diff --git a/Dockerfile b/Dockerfile
index adae492..9d50907 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,51 +1,34 @@
-# Build stage for Elm frontend
-FROM node:25-alpine AS elm-build
+FROM node:22-alpine AS frontend-builder
 
-WORKDIR /frontend
+WORKDIR /src/frontend
 
-# Install Elm
-RUN npm install -g elm@latest-0.19.1
+COPY frontend/package.json frontend/package-lock.json ./
+RUN npm ci
 
-# Copy Elm files
-COPY frontend/elm.json .
-COPY frontend/src ./src
+COPY frontend/ ./
+RUN npm run build
 
-# Build Elm app
-RUN elm make src/Main.elm --optimize --output=elm.js
+FROM golang:1.25.5-alpine AS backend-builder
 
-# Build stage for Go backend
-FROM golang:1.25.3-alpine AS go-build
+WORKDIR /src/backend
 
-WORKDIR /app
-
-# Copy go mod files
 COPY backend/go.mod backend/go.sum ./
 RUN go mod download
 
-# Copy backend source
 COPY backend/ ./
 
-# Build Go binary
-RUN CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o main .
+COPY --from=frontend-builder /src/frontend/dist ./dist
+
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-s -w" -o timetracker .
 
-# Final stage
 FROM alpine:latest
 
 RUN apk --no-cache add ca-certificates tzdata
 
-WORKDIR /root/
+WORKDIR /app
 
-# Copy Go binary from build stage
-COPY --from=go-build /app/main .
+COPY --from=backend-builder /src/backend/timetracker .
 
-# Create static directory
-RUN mkdir -p /root/static
-
-# Copy Elm build artifacts
-COPY --from=elm-build /frontend/elm.js /root/static/
-COPY frontend/public/index.html /root/static/
-
-# Create volume for database
 VOLUME ["/data"]
 
 ENV PORT=8080
@@ -53,4 +36,4 @@ ENV DB_PATH=/data/timetracking.db
 
 EXPOSE 8080
 
-CMD ["./main"]
+CMD ["./timetracker"]
diff --git a/README.md b/README.md
index 732cdbb..70397ee 100644
--- a/README.md
+++ b/README.md
@@ -65,8 +65,9 @@ Das System arbeitet mit ISO-Kalenderwochen und unterstützt schuljahrbezogene Au
 
 ### Frontend
 
-- **Elm 0.19**: Funktionale Programmiersprache für type-safe UI
-- **Bulma CSS**: Modernes CSS-Framework
+- **Svelte 5**: Reaktivität und Performance.
+- **Vite**: Build-Tooling.
+- **Tailwind CSS + DaisyUI**: UI-Komponenten.
 - **Font Awesome**: Icons
 - **LocalStorage**: Client-seitige Datenpersistenz für Authentifizierung
 
@@ -93,9 +94,8 @@ Das System arbeitet mit ISO-Kalenderwochen und unterstützt schuljahrbezogene Au
 
 ### Für lokale Entwicklung
 
-- Go 1.21+
-- Elm 0.19
-- Node.js 16+ (für Elm-Tooling)
+- Go 1.25+
+- Node.js 20+
 - SQLite3
 
 ## 🚀 Installation
@@ -770,6 +770,6 @@ Todo
 
 ---
 
-**Version**: 1.5.0  
-**Letztes Update**: November 2025  
+**Version**: 1.7.0  
+**Letztes Update**: Januar 2026  
 **Entwickelt für**: Schulen zur Verwaltung von Flexistunden pädagogischer Mitarbeiter
diff --git a/backend/database.go b/backend/database.go
index 66f3e54..3f06ab6 100644
--- a/backend/database.go
+++ b/backend/database.go
@@ -14,20 +14,45 @@ import (
 )
 
 func InitDB(filepath string) *sql.DB {
-	db, err := sql.Open("sqlite", filepath)
+	dsn := filepath + "?_pragma=journal_mode(WAL)&_pragma=busy_timeout(5000)&_pragma=synchronous(NORMAL)"
+
+	db, err := sql.Open("sqlite", dsn)
 	if err != nil {
 		log.Fatal(err)
 	}
 
+	db.SetMaxOpenConns(1)
+	db.SetMaxIdleConns(1)
+	db.SetConnMaxLifetime(time.Hour)
+
 	if err = db.Ping(); err != nil {
 		log.Fatal(err)
 	}
 
 	createTables(db)
 	createIndexes(db)
+
+	ensureAdminExists(db)
+
 	return db
 }
 
+func ensureAdminExists(db *sql.DB) {
+	var count int
+	db.QueryRow("SELECT COUNT(*) FROM users").Scan(&count)
+	if count == 0 {
+		log.Println("Keine Benutzer gefunden. Erstelle Standard-Admin...")
+		pw, _ := bcrypt.GenerateFromPassword([]byte("admin123"), bcrypt.DefaultCost)
+		_, err := db.Exec("INSERT INTO users (username, password, is_admin, yearly_hours) VALUES (?, ?, ?, ?)",
+			"admin", string(pw), true, 0)
+		if err != nil {
+			log.Printf("Fehler beim Erstellen des Admins: %v", err)
+		} else {
+			log.Println("Admin erstellt. User: 'admin', Pass: 'admin123'")
+		}
+	}
+}
+
 func createTables(db *sql.DB) {
 	queries := []string{
 		`CREATE TABLE IF NOT EXISTS users (
@@ -56,58 +81,35 @@ func createTables(db *sql.DB) {
 			start_time TEXT NOT NULL,
 			end_time TEXT NOT NULL,
 			created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
-			FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
-			FOREIGN KEY (schedule_id) REFERENCES schedules(id)
-		)`,
-		`CREATE TABLE IF NOT EXISTS audit_logs (
-			id INTEGER PRIMARY KEY AUTOINCREMENT,
-			user_id INTEGER NOT NULL,
-			action TEXT NOT NULL,
-			details TEXT,
-			created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+			FOREIGN KEY(user_id) REFERENCES users(id),
+			FOREIGN KEY(schedule_id) REFERENCES schedules(id)
 		)`,
 		`CREATE TABLE IF NOT EXISTS school_years (
-    	id INTEGER PRIMARY KEY AUTOINCREMENT,
-     	name TEXT NOT NULL UNIQUE,
-      	start_date DATE NOT NULL,
-       	end_date DATE NOT NULL,
-        is_active BOOLEAN NOT NULL DEFAULT 0,
-        created_at DATETIME DEFAULT CURRENT_TIMESTAMP
+			id INTEGER PRIMARY KEY AUTOINCREMENT,
+			name TEXT NOT NULL,
+			start_date TEXT NOT NULL,
+			end_date TEXT NOT NULL,
+			is_active BOOLEAN NOT NULL DEFAULT 0,
+			created_at DATETIME DEFAULT CURRENT_TIMESTAMP
 		)`,
 	}
 
 	for _, query := range queries {
-		if _, err := db.Exec(query); err != nil {
-			log.Fatal(err)
+		_, err := db.Exec(query)
+		if err != nil {
+			log.Fatalf("Error creating table: %s\nQuery: %s", err, query)
 		}
 	}
-
-	hash, _ := bcrypt.GenerateFromPassword([]byte("admin123"), bcrypt.DefaultCost)
-	_, err := db.Exec(`
-		INSERT OR IGNORE INTO users (id, username, password, is_admin, yearly_hours)
-		VALUES (?, ?, ?, ?, ?)`,
-		1, "admin", string(hash), true, 40.0,
-	)
-	if err != nil {
-		log.Fatal(err)
-	}
 }
 
 func createIndexes(db *sql.DB) {
 	indexes := []string{
-		`CREATE INDEX IF NOT EXISTS idx_time_entries_user_date ON time_entries(user_id, date)`,
-		`CREATE INDEX IF NOT EXISTS idx_time_entries_date ON time_entries(date)`,
-		`CREATE INDEX IF NOT EXISTS idx_audit_logs_user ON audit_logs(user_id)`,
-		`CREATE INDEX IF NOT EXISTS idx_audit_logs_created ON audit_logs(created_at)`,
-		`CREATE INDEX IF NOT EXISTS idx_schedules_day ON schedules(day_of_week)`,
-		`CREATE INDEX IF NOT EXISTS idx_school_years_active ON school_years(is_active)`,
-		`CREATE INDEX IF NOT EXISTS idx_school_years_dates ON school_years(start_date, end_date)`,
+		"CREATE UNIQUE INDEX IF NOT EXISTS idx_users_username ON users(username)",
+		"CREATE INDEX IF NOT EXISTS idx_time_entries_user_date ON time_entries(user_id, date)",
+		"CREATE INDEX IF NOT EXISTS idx_schedules_day ON schedules(day_of_week)",
 	}
-
 	for _, idx := range indexes {
-		if _, err := db.Exec(idx); err != nil {
-			log.Printf("Warning: Failed to create index: %v", err)
-		}
+		db.Exec(idx)
 	}
 }
 
diff --git a/backend/handlers.go b/backend/handlers.go
index 06b3f57..55f8684 100644
--- a/backend/handlers.go
+++ b/backend/handlers.go
@@ -3,8 +3,10 @@ package main
 import (
 	"database/sql"
 	"fmt"
+	"io"
 	"log"
 	"net/http"
+	"os"
 	"strconv"
 	"strings"
 	"time"
@@ -726,3 +728,74 @@ func (app *App) DeleteSchoolYearHandler(c echo.Context) error {
 
 	return c.NoContent(http.StatusNoContent)
 }
+
+func (app *App) ChangeMyPasswordHandler(c echo.Context) error {
+	claims, err := getClaims(c)
+	if err != nil {
+		return HandleError(c, ErrUnauthorizedMsg())
+	}
+
+	var req ChangePasswordRequest
+	if err := c.Bind(&req); err != nil {
+		return HandleError(c, ErrInvalidInputMsg("Anfragedaten"))
+	}
+
+	if len(req.NewPassword) < 6 {
+		return HandleError(c, ErrInvalidInputMsg("Neues Passwort muss mind. 6 Zeichen lang sein"))
+	}
+
+	var currentHash string
+	err = app.DB.QueryRow("SELECT password FROM users WHERE id = ?", claims.UserID).Scan(&currentHash)
+	if err != nil {
+		return HandleError(c, ErrDatabaseMsg(err))
+	}
+
+	if err := bcrypt.CompareHashAndPassword([]byte(currentHash), []byte(req.OldPassword)); err != nil {
+		return HandleError(c, ErrInvalidInputMsg("Altes Passwort ist falsch"))
+	}
+
+	newHash, err := bcrypt.GenerateFromPassword([]byte(req.NewPassword), bcrypt.DefaultCost)
+	if err != nil {
+		return HandleError(c, ErrInternalMsg(err))
+	}
+
+	_, err = app.DB.Exec("UPDATE users SET password = ? WHERE id = ?", string(newHash), claims.UserID)
+	if err != nil {
+		return HandleError(c, ErrDatabaseMsg(err))
+	}
+
+	return c.JSON(http.StatusOK, map[string]string{"message": "Passwort erfolgreich geändert"})
+}
+
+func (app *App) GetLogoHandler(c echo.Context) error {
+	if _, err := os.Stat("school_logo.png"); os.IsNotExist(err) {
+		return c.NoContent(http.StatusNotFound)
+	}
+	c.Response().Header().Set("Cache-Control", "no-cache")
+	return c.File("school_logo.png")
+}
+
+func (app *App) UploadLogoHandler(c echo.Context) error {
+	file, err := c.FormFile("logo")
+	if err != nil {
+		return HandleError(c, ErrInvalidInputMsg("Keine Datei hochgeladen"))
+	}
+
+	src, err := file.Open()
+	if err != nil {
+		return HandleError(c, ErrInternalMsg(err))
+	}
+	defer src.Close()
+
+	dst, err := os.Create("school_logo.png")
+	if err != nil {
+		return HandleError(c, ErrInternalMsg(err))
+	}
+	defer dst.Close()
+
+	if _, err = io.Copy(dst, src); err != nil {
+		return HandleError(c, ErrInternalMsg(err))
+	}
+
+	return c.JSON(http.StatusOK, map[string]string{"message": "Logo erfolgreich hochgeladen"})
+}
diff --git a/backend/load-env.sh b/backend/load-env.sh
index 7358e39..d374b7a 100755
--- a/backend/load-env.sh
+++ b/backend/load-env.sh
@@ -11,7 +11,7 @@ else
 fi
 
 if [ -z "$PORT" ]; then
-    export PORT=8080
+    export PORT=8085
 fi
 
 if [ -z "$DB_PATH" ]; then
diff --git a/backend/main.go b/backend/main.go
index 84cb7f1..c7faa85 100644
--- a/backend/main.go
+++ b/backend/main.go
@@ -1,6 +1,10 @@
 package main
 
 import (
+	"embed"
+	"fmt"
+	"io"
+	"io/fs"
 	"log"
 	"net/http"
 	"os"
@@ -10,6 +14,9 @@ import (
 	"github.com/labstack/echo/v4/middleware"
 )
 
+//go:embed dist
+var frontendDist embed.FS
+
 func main() {
 	dbPath := os.Getenv("DB_PATH")
 	if dbPath == "" {
@@ -26,14 +33,15 @@ func main() {
 	e.Use(middleware.Logger())
 	e.Use(middleware.Recover())
 
-	// CORS Configuration
-	allowOrigins := []string{"*"} // Default for development
+	e.Use(middleware.Gzip())
+
+	e.Use(middleware.Secure())
+
+	allowOrigins := []string{"*"}
 	if os.Getenv("ENVIRONMENT") == "production" {
 		origins := os.Getenv("CORS_ALLOWED_ORIGINS")
 		if origins != "" {
 			allowOrigins = strings.Split(origins, ",")
-		} else {
-			log.Println("Warning: ENVIRONMENT is 'production' but CORS_ALLOWED_ORIGINS is not set. Allowing all origins.")
 		}
 	}
 
@@ -46,6 +54,7 @@ func main() {
 	e.HTTPErrorHandler = customHTTPErrorHandler
 
 	e.POST("/api/login", app.LoginHandler)
+	e.GET("/api/logo", app.GetLogoHandler)
 
 	protected := e.Group("/api")
 	protected.Use(JWTMiddleware())
@@ -59,6 +68,7 @@ func main() {
 		protected.GET("/week-has-entries", app.CheckWeekHasEntries)
 		protected.GET("/yearly-hours-summary", app.GetYearlyHoursSummaryHandler)
 		protected.GET("/my-info", app.GetMyInfoHandler)
+		protected.POST("/change-password", app.ChangeMyPasswordHandler)
 		protected.GET("/school-year/active", app.GetActiveSchoolYearHandler)
 	}
 
@@ -83,13 +93,38 @@ func main() {
 		admin.DELETE("/school-years/:id", app.DeleteSchoolYearHandler)
 		admin.PUT("/school-years/:id/activate", app.SetActiveSchoolYearHandler)
 		admin.GET("/yearly-summary/pdf", app.GenerateYearlySummaryPDFHandler)
+		admin.POST("/settings/logo", app.UploadLogoHandler)
 	}
 
-	e.Static("/", "./static")
+	distDir, err := fs.Sub(frontendDist, "dist")
+	if err != nil {
+		log.Fatal("Fehler beim Laden des eingebetteten Frontends:", err)
+	}
+
+	fileHandler := http.FileServer(http.FS(distDir))
+	e.GET("/*", func(c echo.Context) error {
+		path := c.Request().URL.Path
+		f, err := distDir.Open(strings.TrimPrefix(path, "/"))
+		if err == nil {
+			f.Close()
+			fileHandler.ServeHTTP(c.Response(), c.Request())
+			return nil
+		}
+
+		index, err := distDir.Open("index.html")
+		if err != nil {
+			return echo.NewHTTPError(http.StatusInternalServerError, "Frontend index.html missing")
+		}
+		defer index.Close()
+
+		stat, _ := index.Stat()
+		http.ServeContent(c.Response(), c.Request(), "index.html", stat.ModTime(), index.(io.ReadSeeker))
+		return nil
+	})
 
 	port := os.Getenv("PORT")
 	if port == "" {
-		port = "8080"
+		port = "8085"
 	}
 
 	log.Printf("Server starting on port %s", port)
@@ -102,16 +137,9 @@ func customHTTPErrorHandler(err error, c echo.Context) {
 
 	if he, ok := err.(*echo.HTTPError); ok {
 		code = he.Code
-		message = he.Message.(string)
+		message = fmt.Sprintf("%v", he.Message)
 	}
 
-	if !c.Response().Committed {
-		if c.Request().Method == http.MethodHead {
-			c.NoContent(code)
-		} else {
-			c.JSON(code, map[string]string{
-				"error": message,
-			})
-		}
-	}
+	c.Logger().Error(err)
+	c.JSON(code, map[string]string{"message": message})
 }
diff --git a/backend/models.go b/backend/models.go
index 8429bb6..8cf5c6b 100644
--- a/backend/models.go
+++ b/backend/models.go
@@ -23,10 +23,10 @@ type WeeklyHours struct {
 	Week            int     `json:"week"`
 	Year            int     `json:"year"`
 	TotalHours      float64 `json:"total_hours"`
-	YearlyTarget    float64 `json:"yearly_target"`    // NEU
-	YearlyActual    float64 `json:"yearly_actual"`    // NEU
-	WeeklyTarget    float64 `json:"weekly_target"`    // NEU
-	RemainingYearly float64 `json:"remaining_yearly"` // NEU
+	YearlyTarget    float64 `json:"yearly_target"`
+	YearlyActual    float64 `json:"yearly_actual"`
+	WeeklyTarget    float64 `json:"weekly_target"`
+	RemainingYearly float64 `json:"remaining_yearly"`
 }
 
 type User struct {
@@ -101,3 +101,8 @@ type Claims struct {
 	IsAdmin  bool   `json:"is_admin"`
 	jwt.RegisteredClaims
 }
+
+type ChangePasswordRequest struct {
+	OldPassword string `json:"old_password"`
+	NewPassword string `json:"new_password"`
+}
diff --git a/docker-compose.yml b/docker-compose.yml
index 221d016..39e31ce 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -2,23 +2,18 @@ services:
   timetracking:
     build: .
     container_name: school-timetracking
+    restart: unless-stopped
     ports:
       - "8080:8080"
     environment:
       - PORT=8080
+      - ENVIRONMENT=production
       - DB_PATH=/data/timetracking.db
-      - JWT_SECRET=your-default-secret-change-me
-      - TZ=Europe/Berlin # Optional: Zeitzone
+      - JWT_SECRET=change-me-to-something-secure-and-long
+      - TZ=Europe/Berlin
+      - CORS_ALLOWED_ORIGINS=http://localhost:8080
     volumes:
-      - timetracking-data:/data
-    restart: unless-stopped
-    networks:
-      - timetracking-net
+      - timetracking_data:/data
 
 volumes:
-  timetracking-data:
-    driver: local
-
-networks:
-  timetracking-net:
-    driver: bridge
+  timetracking_data:
diff --git a/frontend/elm.json b/frontend/elm.json
deleted file mode 100644
index 07196ee..0000000
--- a/frontend/elm.json
+++ /dev/null
@@ -1,27 +0,0 @@
-{
-    "type": "application",
-    "source-directories": [
-        "src"
-    ],
-    "elm-version": "0.19.1",
-    "dependencies": {
-        "direct": {
-            "elm/browser": "1.0.2",
-            "elm/bytes": "1.0.8",
-            "elm/core": "1.0.5",
-            "elm/file": "1.0.5",
-            "elm/html": "1.0.0",
-            "elm/http": "2.0.0",
-            "elm/json": "1.1.3",
-            "elm/time": "1.0.0"
-        },
-        "indirect": {
-            "elm/url": "1.0.0",
-            "elm/virtual-dom": "1.0.3"
-        }
-    },
-    "test-dependencies": {
-        "direct": {},
-        "indirect": {}
-    }
-}
diff --git a/frontend/index.html b/frontend/index.html
new file mode 100644
index 0000000..705ff05
--- /dev/null
+++ b/frontend/index.html
@@ -0,0 +1,14 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <link rel="icon" type="image/svg+xml" href="/vite.svg" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>school-timetracker</title>
+
+  </head>
+  <body>
+    <div id="app"></div>
+    <script type="module" src="/src/main.js"></script>
+  </body>
+</html>
diff --git a/frontend/jsconfig.json b/frontend/jsconfig.json
new file mode 100644
index 0000000..c7a0b10
--- /dev/null
+++ b/frontend/jsconfig.json
@@ -0,0 +1,33 @@
+{
+  "compilerOptions": {
+    "moduleResolution": "bundler",
+    "target": "ESNext",
+    "module": "ESNext",
+    /**
+     * svelte-preprocess cannot figure out whether you have
+     * a value or a type, so tell TypeScript to enforce using
+     * `import type` instead of `import` for Types.
+     */
+    "verbatimModuleSyntax": true,
+    "isolatedModules": true,
+    "resolveJsonModule": true,
+    /**
+     * To have warnings / errors of the Svelte compiler at the
+     * correct position, enable source maps by default.
+     */
+    "sourceMap": true,
+    "esModuleInterop": true,
+    "types": ["vite/client"],
+    "skipLibCheck": true,
+    /**
+     * Typecheck JS in `.svelte` and `.js` files by default.
+     * Disable this if you'd like to use dynamic types.
+     */
+    "checkJs": true
+  },
+  /**
+   * Use global.d.ts instead of compilerOptions.types
+   * to avoid limiting type declarations.
+   */
+  "include": ["src/**/*.d.ts", "src/**/*.js", "src/**/*.svelte"]
+}
diff --git a/frontend/package-lock.json b/frontend/package-lock.json
new file mode 100644
index 0000000..81e876f
--- /dev/null
+++ b/frontend/package-lock.json
@@ -0,0 +1,2061 @@
+{
+  "name": "school-timetracker",
+  "version": "0.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "school-timetracker",
+      "version": "0.0.0",
+      "dependencies": {
+        "@tailwindcss/vite": "^4.1.18",
+        "daisyui": "^5.5.14",
+        "tailwindcss": "^4.1.18"
+      },
+      "devDependencies": {
+        "@sveltejs/vite-plugin-svelte": "^6.2.1",
+        "autoprefixer": "^10.4.23",
+        "postcss": "^8.5.6",
+        "svelte": "^5.43.8",
+        "vite": "^7.2.4"
+      }
+    },
+    "node_modules/@esbuild/aix-ppc64": {
+      "version": "0.27.2",
+      "resolved": "https://registry.npmjs.org/@esbuild/aix-ppc64/-/aix-ppc64-0.27.2.tgz",
+      "integrity": "sha512-GZMB+a0mOMZs4MpDbj8RJp4cw+w1WV5NYD6xzgvzUJ5Ek2jerwfO2eADyI6ExDSUED+1X8aMbegahsJi+8mgpw==",
+      "cpu": [
+        "ppc64"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "aix"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/android-arm": {
+      "version": "0.27.2",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-arm/-/android-arm-0.27.2.tgz",
+      "integrity": "sha512-DVNI8jlPa7Ujbr1yjU2PfUSRtAUZPG9I1RwW4F4xFB1Imiu2on0ADiI/c3td+KmDtVKNbi+nffGDQMfcIMkwIA==",
+      "cpu": [
+        "arm"
+      ],
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "android"
+      ],
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/@esbuild/android-arm64": {
+      "version": "0.27.2",
+      "resolved": "https://registry.npmjs.org/@esbuild/android-arm64/-/android-arm64-0.27.2.tgz",
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+        "postcss": "^8.5.6",
+        "rollup": "^4.43.0",
+        "tinyglobby": "^0.2.15"
+      },
+      "bin": {
+        "vite": "bin/vite.js"
+      },
+      "engines": {
+        "node": "^20.19.0 || >=22.12.0"
+      },
+      "funding": {
+        "url": "https://github.com/vitejs/vite?sponsor=1"
+      },
+      "optionalDependencies": {
+        "fsevents": "~2.3.3"
+      },
+      "peerDependencies": {
+        "@types/node": "^20.19.0 || >=22.12.0",
+        "jiti": ">=1.21.0",
+        "less": "^4.0.0",
+        "lightningcss": "^1.21.0",
+        "sass": "^1.70.0",
+        "sass-embedded": "^1.70.0",
+        "stylus": ">=0.54.8",
+        "sugarss": "^5.0.0",
+        "terser": "^5.16.0",
+        "tsx": "^4.8.1",
+        "yaml": "^2.4.2"
+      },
+      "peerDependenciesMeta": {
+        "@types/node": {
+          "optional": true
+        },
+        "jiti": {
+          "optional": true
+        },
+        "less": {
+          "optional": true
+        },
+        "lightningcss": {
+          "optional": true
+        },
+        "sass": {
+          "optional": true
+        },
+        "sass-embedded": {
+          "optional": true
+        },
+        "stylus": {
+          "optional": true
+        },
+        "sugarss": {
+          "optional": true
+        },
+        "terser": {
+          "optional": true
+        },
+        "tsx": {
+          "optional": true
+        },
+        "yaml": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/vitefu": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/vitefu/-/vitefu-1.1.1.tgz",
+      "integrity": "sha512-B/Fegf3i8zh0yFbpzZ21amWzHmuNlLlmJT6n7bu5e+pCHUKQIfXSYokrqOBGEMMe9UG2sostKQF9mml/vYaWJQ==",
+      "dev": true,
+      "license": "MIT",
+      "workspaces": [
+        "tests/deps/*",
+        "tests/projects/*",
+        "tests/projects/workspace/packages/*"
+      ],
+      "peerDependencies": {
+        "vite": "^3.0.0 || ^4.0.0 || ^5.0.0 || ^6.0.0 || ^7.0.0-beta.0"
+      },
+      "peerDependenciesMeta": {
+        "vite": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/zimmerframe": {
+      "version": "1.1.4",
+      "resolved": "https://registry.npmjs.org/zimmerframe/-/zimmerframe-1.1.4.tgz",
+      "integrity": "sha512-B58NGBEoc8Y9MWWCQGl/gq9xBCe4IiKM0a2x7GZdQKOW5Exr8S1W24J6OgM1njK8xCRGvAJIL/MxXHf6SkmQKQ==",
+      "dev": true,
+      "license": "MIT"
+    }
+  }
+}
diff --git a/frontend/package.json b/frontend/package.json
new file mode 100644
index 0000000..fe2de5a
--- /dev/null
+++ b/frontend/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "school-timetracker",
+  "private": true,
+  "version": "0.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview"
+  },
+  "devDependencies": {
+    "@sveltejs/vite-plugin-svelte": "^6.2.1",
+    "autoprefixer": "^10.4.23",
+    "postcss": "^8.5.6",
+    "svelte": "^5.43.8",
+    "vite": "^7.2.4"
+  },
+  "dependencies": {
+    "@tailwindcss/vite": "^4.1.18",
+    "daisyui": "^5.5.14",
+    "tailwindcss": "^4.1.18"
+  }
+}
diff --git a/frontend/public/index.html b/frontend/public/index.html
deleted file mode 100644
index 12ae1c0..0000000
--- a/frontend/public/index.html
+++ /dev/null
@@ -1,338 +0,0 @@
-<!doctype html>
-<html lang="de">
-
-<head>
-    <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
-    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
-    <title>Zeiterfassung</title>
-
-    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bulma@0.9.4/css/bulma.min.css" />
-
-    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css" />
-
-    <style>
-        /* Toast-Container */
-        .toast-container {
-            position: fixed;
-            top: 20px;
-            right: 20px;
-            z-index: 9999;
-            display: flex;
-            flex-direction: column;
-            gap: 12px;
-            max-width: 400px;
-            pointer-events: none;
-        }
-
-        /* Basis-Toast */
-        .toast {
-            display: flex;
-            align-items: center;
-            justify-content: space-between;
-            padding: 16px 20px;
-            border-radius: 8px;
-            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
-            backdrop-filter: blur(10px);
-            pointer-events: all;
-            min-width: 320px;
-            transition: all 0.3s ease;
-            border-left: 4px solid;
-        }
-
-        .toast:hover {
-            transform: translateX(-5px);
-            box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
-        }
-
-        /* Toast-Content */
-        .toast-content {
-            display: flex;
-            align-items: center;
-            gap: 12px;
-            flex: 1;
-        }
-
-        .toast-icon {
-            font-size: 1.25rem;
-            display: flex;
-            align-items: center;
-        }
-
-        .toast-message {
-            font-size: 0.95rem;
-            line-height: 1.4;
-            color: #2c3e50;
-            font-weight: 500;
-        }
-
-        /* Close-Button */
-        .toast-close {
-            background: transparent;
-            border: none;
-            cursor: pointer;
-            padding: 4px;
-            margin-left: 12px;
-            color: rgba(0, 0, 0, 0.4);
-            transition: color 0.2s ease;
-            font-size: 1rem;
-        }
-
-        .toast-close:hover {
-            color: rgba(0, 0, 0, 0.7);
-        }
-
-        /* Toast-Typen */
-        .toast-error {
-            background: linear-gradient(135deg, #fff5f5 0%, #ffe5e5 100%);
-            border-left-color: #e53e3e;
-        }
-
-        .toast-error .toast-icon {
-            color: #e53e3e;
-        }
-
-        .toast-success {
-            background: linear-gradient(135deg, #f0fff4 0%, #e6ffed 100%);
-            border-left-color: #38a169;
-        }
-
-        .toast-success .toast-icon {
-            color: #38a169;
-        }
-
-        .toast-info {
-            background: linear-gradient(135deg, #ebf8ff 0%, #e0f3ff 100%);
-            border-left-color: #3182ce;
-        }
-
-        .toast-info .toast-icon {
-            color: #3182ce;
-        }
-
-        .toast-warning {
-            background: linear-gradient(135deg, #fffaf0 0%, #fff5e6 100%);
-            border-left-color: #dd6b20;
-        }
-
-        .toast-warning .toast-icon {
-            color: #dd6b20;
-        }
-
-        /* Animationen */
-        @keyframes slideIn {
-            from {
-                transform: translateX(400px);
-                opacity: 0;
-            }
-
-            to {
-                transform: translateX(0);
-                opacity: 1;
-            }
-        }
-
-        @keyframes slideOut {
-            from {
-                transform: translateX(0);
-                opacity: 1;
-            }
-
-            to {
-                transform: translateX(400px);
-                opacity: 0;
-            }
-        }
-
-        .toast.dismissing {
-            animation: slideOut 0.3s ease-in forwards;
-        }
-
-        /* Mobile Anpassungen */
-        @media screen and (max-width: 768px) {
-            .toast-container {
-                top: 10px;
-                right: 10px;
-                left: 10px;
-                max-width: none;
-            }
-
-            .toast {
-                min-width: auto;
-                width: 100%;
-            }
-
-            .toast-message {
-                font-size: 0.9rem;
-            }
-        }
-
-        /* Dark Mode Support (optional) */
-        @media (prefers-color-scheme: dark) {
-            .toast {
-                box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
-            }
-
-            .toast-message {
-                color: #1a202c;
-            }
-
-            .toast-close {
-                color: rgba(0, 0, 0, 0.5);
-            }
-
-            .toast-close:hover {
-                color: rgba(0, 0, 0, 0.8);
-            }
-        }
-
-        body {
-            min-height: 100vh;
-        }
-
-        .table-container {
-            overflow-x: auto;
-        }
-
-        @media screen and (max-width: 768px) {
-            .level {
-                flex-direction: column;
-            }
-
-            .level-left,
-            .level-right {
-                width: 100%;
-            }
-
-            .level-item {
-                justify-content: center;
-                margin-bottom: 0.5rem;
-            }
-
-            .buttons {
-                flex-wrap: wrap;
-            }
-
-            .button {
-                margin-bottom: 0.5rem;
-            }
-        }
-
-        .fa-spinner {
-            animation: fa-spin 1s infinite linear;
-        }
-
-        @keyframes fa-spin {
-            0% {
-                transform: rotate(0deg);
-            }
-
-            100% {
-                transform: rotate(360deg);
-            }
-        }
-    </style>
-</head>
-
-<body>
-    <div id="elm"></div>
-
-    <script src="/elm.js"></script>
-    <script>
-        function getStoredData() {
-            try {
-                const data = localStorage.getItem("timetracking");
-                if (data) {
-                    return JSON.parse(data);
-                }
-            } catch (e) {
-                console.error("Failed to parse stored data:", e);
-            }
-            return {token: null, isAdmin: false};
-        }
-
-        function saveData(token, isAdmin) {
-            try {
-                localStorage.setItem(
-                    "timetracking",
-                    JSON.stringify({
-                        token: token,
-                        isAdmin: isAdmin,
-                    }),
-                );
-            } catch (e) {
-                console.error("Failed to save data:", e);
-            }
-        }
-
-        function clearData() {
-            try {
-                localStorage.removeItem("timetracking");
-            } catch (e) {
-                console.error("Failed to clear data:", e);
-            }
-        }
-
-        const storedData = getStoredData();
-        const app = Elm.Main.init({
-            node: document.getElementById("elm"),
-            flags: {
-                token: storedData.token,
-                isAdmin: storedData.isAdmin,
-            },
-        });
-
-        app.ports.saveToken.subscribe(function (data) {
-            saveData(data.token, data.isAdmin);
-        });
-
-        app.ports.removeToken.subscribe(function () {
-            clearData();
-        });
-
-        app.ports.confirmDelete.subscribe(function (message) {
-            const confirmed = confirm(message);
-            app.ports.confirmDeleteResponse.send(confirmed);
-        });
-
-        document.addEventListener("DOMContentLoaded", () => {
-            function setupBurgerMenu() {
-                const burgers = document.querySelectorAll(".navbar-burger");
-
-                burgers.forEach((burger) => {
-                    burger.addEventListener("click", () => {
-                        const target = burger.dataset.target;
-                        const menu = document.getElementById(target);
-
-                        if (menu) {
-                            burger.classList.toggle("is-active");
-                            menu.classList.toggle("is-active");
-                        }
-                    });
-                });
-            }
-
-            setupBurgerMenu();
-
-            const observer = new MutationObserver((mutations) => {
-                setupBurgerMenu();
-            });
-
-            observer.observe(document.getElementById("elm"), {
-                childList: true,
-                subtree: true,
-            });
-        });
-
-        if (
-            "serviceWorker" in navigator &&
-            window.location.protocol === "https:"
-        ) {
-            navigator.serviceWorker.register("/sw.js").catch(() => {
-                console.log("Service Worker registration failed");
-            });
-        }
-    </script>
-</body>
-
-</html>
diff --git a/frontend/public/vite.svg b/frontend/public/vite.svg
new file mode 100644
index 0000000..e7b8dfb
--- /dev/null
+++ b/frontend/public/vite.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="31.88" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 257"><defs><linearGradient id="IconifyId1813088fe1fbc01fb466" x1="-.828%" x2="57.636%" y1="7.652%" y2="78.411%"><stop offset="0%" stop-color="#41D1FF"></stop><stop offset="100%" stop-color="#BD34FE"></stop></linearGradient><linearGradient id="IconifyId1813088fe1fbc01fb467" x1="43.376%" x2="50.316%" y1="2.242%" y2="89.03%"><stop offset="0%" stop-color="#FFEA83"></stop><stop offset="8.333%" stop-color="#FFDD35"></stop><stop offset="100%" stop-color="#FFA800"></stop></linearGradient></defs><path fill="url(#IconifyId1813088fe1fbc01fb466)" d="M255.153 37.938L134.897 252.976c-2.483 4.44-8.862 4.466-11.382.048L.875 37.958c-2.746-4.814 1.371-10.646 6.827-9.67l120.385 21.517a6.537 6.537 0 0 0 2.322-.004l117.867-21.483c5.438-.991 9.574 4.796 6.877 9.62Z"></path><path fill="url(#IconifyId1813088fe1fbc01fb467)" d="M185.432.063L96.44 17.501a3.268 3.268 0 0 0-2.634 3.014l-5.474 92.456a3.268 3.268 0 0 0 3.997 3.378l24.777-5.718c2.318-.535 4.413 1.507 3.936 3.838l-7.361 36.047c-.495 2.426 1.782 4.5 4.151 3.78l15.304-4.649c2.372-.72 4.652 1.36 4.15 3.788l-11.698 56.621c-.732 3.542 3.979 5.473 5.943 2.437l1.313-2.028l72.516-144.72c1.215-2.423-.88-5.186-3.54-4.672l-25.505 4.922c-2.396.462-4.435-1.77-3.759-4.114l16.646-57.705c.677-2.35-1.37-4.583-3.769-4.113Z"></path></svg>
\ No newline at end of file
diff --git a/frontend/src/Api/Auth.elm b/frontend/src/Api/Auth.elm
deleted file mode 100644
index 0de5c4e..0000000
--- a/frontend/src/Api/Auth.elm
+++ /dev/null
@@ -1,21 +0,0 @@
-module Api.Auth exposing (loginRequest)
-
-import Api.Decoders exposing (loginDecoder)
-import Http
-import Json.Encode as Encode
-import Types.Api exposing (LoginResult)
-import Types.Msg exposing (Msg(..))
-
-
-loginRequest : String -> String -> Cmd Msg
-loginRequest username password =
-    Http.post
-        { url = "/api/login"
-        , body =
-            Http.jsonBody <|
-                Encode.object
-                    [ ( "username", Encode.string username )
-                    , ( "password", Encode.string password )
-                    ]
-        , expect = Http.expectJson LoginResponse loginDecoder
-        }
diff --git a/frontend/src/Api/Decoders.elm b/frontend/src/Api/Decoders.elm
deleted file mode 100644
index cb72efa..0000000
--- a/frontend/src/Api/Decoders.elm
+++ /dev/null
@@ -1,109 +0,0 @@
-module Api.Decoders exposing
-    ( apiErrorDecoder
-    , loginDecoder
-    , scheduleDecoder
-    , schoolYearDecoder
-    , timeEntryDecoder
-    , userDecoder
-    , weekDatesDecoder
-    , weeklyHoursDecoder
-    , yearlyHoursSummaryDecoder
-    )
-
-import Dict
-import Json.Decode as Decode exposing (Decoder, bool, field, float, int, list, string)
-import Types.Api exposing (ApiError, LoginResult)
-import Types.Model exposing (..)
-
-
-loginDecoder : Decoder LoginResult
-loginDecoder =
-    Decode.map3 LoginResult
-        (field "token" string)
-        (field "username" string)
-        (field "is_admin" bool)
-
-
-scheduleDecoder : Decoder Schedule
-scheduleDecoder =
-    Decode.map6 Schedule
-        (field "id" int)
-        (field "day_of_week" int)
-        (field "start_time" string)
-        (field "end_time" string)
-        (field "type" string)
-        (field "title" string)
-
-
-timeEntryDecoder : Decoder TimeEntry
-timeEntryDecoder =
-    Decode.map8 TimeEntry
-        (field "id" int)
-        (field "user_id" int)
-        (field "schedule_id" int)
-        (field "date" string)
-        (field "type" string)
-        (field "username" string)
-        (field "start_time" string)
-        (field "end_time" string)
-
-
-userDecoder : Decoder User
-userDecoder =
-    Decode.map4 User
-        (field "id" int)
-        (field "username" string)
-        (field "is_admin" bool)
-        (field "yearly_hours" float)
-
-
-weekDatesDecoder : Decoder WeekDates
-weekDatesDecoder =
-    Decode.map4 WeekDates
-        (field "year" int)
-        (field "week" int)
-        (field "dates" (Decode.dict string) |> Decode.map Dict.toList)
-        (field "range" string)
-
-
-weeklyHoursDecoder : Decoder WeeklyHours
-weeklyHoursDecoder =
-    Decode.map7 WeeklyHours
-        (field "user_id" int)
-        (field "username" string)
-        (field "year" int)
-        (field "week" int)
-        (field "total_hours" float)
-        (field "expected_hours" float)
-        (field "remaining_hours" float)
-
-
-yearlyHoursSummaryDecoder : Decoder YearlyHoursSummary
-yearlyHoursSummaryDecoder =
-    Decode.succeed YearlyHoursSummary
-        |> Decode.andThen (\f -> Decode.map f (field "user_id" int))
-        |> Decode.andThen (\f -> Decode.map f (field "username" string))
-        |> Decode.andThen (\f -> Decode.map f (field "year" int))
-        |> Decode.andThen (\f -> Decode.map f (field "week" int))
-        |> Decode.andThen (\f -> Decode.map f (field "total_hours" float))
-        |> Decode.andThen (\f -> Decode.map f (field "yearly_target" float))
-        |> Decode.andThen (\f -> Decode.map f (field "yearly_actual" float))
-        |> Decode.andThen (\f -> Decode.map f (field "weekly_target" float))
-        |> Decode.andThen (\f -> Decode.map f (field "remaining_yearly" float))
-
-
-schoolYearDecoder : Decoder SchoolYear
-schoolYearDecoder =
-    Decode.map5 SchoolYear
-        (field "id" int)
-        (field "name" string)
-        (field "start_date" string)
-        (field "end_date" string)
-        (field "is_active" bool)
-
-
-apiErrorDecoder : Decoder ApiError
-apiErrorDecoder =
-    Decode.map2 ApiError
-        (field "code" string)
-        (field "message" string)
diff --git a/frontend/src/Api/Schedule.elm b/frontend/src/Api/Schedule.elm
deleted file mode 100644
index f966645..0000000
--- a/frontend/src/Api/Schedule.elm
+++ /dev/null
@@ -1,120 +0,0 @@
-module Api.Schedule exposing
-    ( createSchedule
-    , deleteSchedule
-    , fetchSchedules
-    , saveTimeEntriesForWeek
-    )
-
-import Api.Decoders exposing (scheduleDecoder)
-import Http
-import Json.Decode
-import Json.Encode as Encode
-import Types.Model exposing (NewSchedule, Schedule, SelectedEntry, WeekDates)
-import Types.Msg exposing (Msg(..))
-
-
-fetchSchedules : Maybe String -> Cmd Msg
-fetchSchedules maybeToken =
-    case maybeToken of
-        Just token ->
-            Http.request
-                { method = "GET"
-                , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-                , url = "/api/schedules"
-                , body = Http.emptyBody
-                , expect = Http.expectJson SchedulesReceived (Json.Decode.list scheduleDecoder)
-                , timeout = Nothing
-                , tracker = Nothing
-                }
-
-        Nothing ->
-            Cmd.none
-
-
-createSchedule : String -> NewSchedule -> Cmd Msg
-createSchedule token schedule =
-    case String.toInt schedule.dayOfWeek of
-        Just day ->
-            Http.request
-                { method = "POST"
-                , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-                , url = "/api/admin/schedules"
-                , body =
-                    Http.jsonBody <|
-                        Encode.object
-                            [ ( "day_of_week", Encode.int day )
-                            , ( "start_time", Encode.string schedule.startTime )
-                            , ( "end_time", Encode.string schedule.endTime )
-                            , ( "type", Encode.string schedule.scheduleType )
-                            , ( "title", Encode.string schedule.title )
-                            ]
-                , expect = Http.expectWhatever ScheduleCreated
-                , timeout = Nothing
-                , tracker = Nothing
-                }
-
-        Nothing ->
-            Cmd.none
-
-
-deleteSchedule : String -> Int -> Cmd Msg
-deleteSchedule token scheduleId =
-    Http.request
-        { method = "DELETE"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/schedules/delete?id=" ++ String.fromInt scheduleId
-        , body = Http.emptyBody
-        , expect = Http.expectWhatever ScheduleDeleted
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-saveTimeEntriesForWeek : String -> List SelectedEntry -> Int -> Int -> List Schedule -> Maybe WeekDates -> Cmd Msg
-saveTimeEntriesForWeek token selectedEntries year week schedules maybeWeekDates =
-    case maybeWeekDates of
-        Nothing ->
-            Cmd.none
-
-        Just weekDates ->
-            let
-                getScheduleById id =
-                    List.filter (\s -> s.id == id) schedules |> List.head
-
-                getDateForDay dayOfWeek =
-                    weekDates.dates
-                        |> List.filter (\( day, _ ) -> day == String.fromInt dayOfWeek)
-                        |> List.head
-                        |> Maybe.map Tuple.second
-
-                createEntryData entry =
-                    case ( getScheduleById entry.scheduleId, getDateForDay entry.dayOfWeek ) of
-                        ( Just schedule, Just dateStr ) ->
-                            Just <|
-                                Encode.object
-                                    [ ( "schedule_id", Encode.int entry.scheduleId )
-                                    , ( "date", Encode.string dateStr )
-                                    , ( "type", Encode.string schedule.scheduleType )
-                                    , ( "start_time", Encode.string schedule.startTime )
-                                    , ( "end_time", Encode.string schedule.endTime )
-                                    ]
-
-                        _ ->
-                            Nothing
-
-                entriesData =
-                    List.filterMap createEntryData selectedEntries
-            in
-            if List.isEmpty entriesData then
-                Cmd.none
-
-            else
-                Http.request
-                    { method = "POST"
-                    , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-                    , url = "/api/time-entries/batch"
-                    , body = Http.jsonBody <| Encode.object [ ( "entries", Encode.list identity entriesData ) ]
-                    , expect = Http.expectWhatever TimeEntriesSaved
-                    , timeout = Nothing
-                    , tracker = Nothing
-                    }
diff --git a/frontend/src/Api/SchoolYear.elm b/frontend/src/Api/SchoolYear.elm
deleted file mode 100644
index be1fb63..0000000
--- a/frontend/src/Api/SchoolYear.elm
+++ /dev/null
@@ -1,85 +0,0 @@
-module Api.SchoolYear exposing
-    ( activateSchoolYear
-    , createSchoolYear
-    , deleteSchoolYear
-    , fetchActiveSchoolYear
-    , fetchSchoolYears
-    )
-
-import Api.Decoders exposing (schoolYearDecoder)
-import Http
-import Json.Decode as Decode
-import Json.Encode as Encode
-import Types.Model exposing (NewSchoolYear)
-import Types.Msg exposing (Msg(..))
-
-
-fetchSchoolYears : String -> Cmd Msg
-fetchSchoolYears token =
-    Http.request
-        { method = "GET"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/school-years"
-        , body = Http.emptyBody
-        , expect = Http.expectJson SchoolYearsReceived (Decode.list schoolYearDecoder)
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-fetchActiveSchoolYear : String -> Cmd Msg
-fetchActiveSchoolYear token =
-    Http.request
-        { method = "GET"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/school-year/active"
-        , body = Http.emptyBody
-        , expect = Http.expectJson ActiveSchoolYearReceived schoolYearDecoder
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-createSchoolYear : String -> NewSchoolYear -> Cmd Msg
-createSchoolYear token schoolYear =
-    Http.request
-        { method = "POST"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/school-years"
-        , body =
-            Http.jsonBody <|
-                Encode.object
-                    [ ( "name", Encode.string schoolYear.name )
-                    , ( "start_date", Encode.string schoolYear.startDate )
-                    , ( "end_date", Encode.string schoolYear.endDate )
-                    ]
-        , expect = Http.expectWhatever SchoolYearCreated
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-activateSchoolYear : String -> Int -> Cmd Msg
-activateSchoolYear token id =
-    Http.request
-        { method = "PUT"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/school-years/" ++ String.fromInt id ++ "/activate"
-        , body = Http.emptyBody
-        , expect = Http.expectWhatever SchoolYearActivated
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-deleteSchoolYear : String -> Int -> Cmd Msg
-deleteSchoolYear token id =
-    Http.request
-        { method = "DELETE"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/school-years/" ++ String.fromInt id
-        , body = Http.emptyBody
-        , expect = Http.expectWhatever SchoolYearDeleted
-        , timeout = Nothing
-        , tracker = Nothing
-        }
diff --git a/frontend/src/Api/TimeEntry.elm b/frontend/src/Api/TimeEntry.elm
deleted file mode 100644
index c1ebede..0000000
--- a/frontend/src/Api/TimeEntry.elm
+++ /dev/null
@@ -1,201 +0,0 @@
-module Api.TimeEntry exposing
-    ( checkWeekHasEntries
-    , createAdminTimeEntry
-    , deleteTimeEntry
-    , deleteWeekEntries
-    , downloadYearlySummaryPDF
-    , fetchAllTimeEntries
-    , fetchMyTimeEntries
-    , fetchWeekDates
-    , fetchWeeklyHours
-    , fetchYearlyHoursSummary
-    , updateTimeEntry
-    )
-
-import Api.Decoders exposing (timeEntryDecoder, weekDatesDecoder, yearlyHoursSummaryDecoder)
-import Bytes exposing (Bytes)
-import Http
-import Json.Decode as Decode exposing (bool, field)
-import Json.Encode as Encode
-import Types.Model exposing (AdminManualEntry, EditingTimeEntry)
-import Types.Msg exposing (Msg(..))
-
-
-fetchMyTimeEntries : String -> Cmd Msg
-fetchMyTimeEntries token =
-    Http.request
-        { method = "GET"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/my-time-entries"
-        , body = Http.emptyBody
-        , expect = Http.expectJson MyTimeEntriesReceived (Decode.list timeEntryDecoder)
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-fetchAllTimeEntries : String -> Cmd Msg
-fetchAllTimeEntries token =
-    Http.request
-        { method = "GET"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/time-entries"
-        , body = Http.emptyBody
-        , expect = Http.expectJson AllTimeEntriesReceived (Decode.list timeEntryDecoder)
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-fetchWeekDates : String -> Int -> Int -> Cmd Msg
-fetchWeekDates token year week =
-    Http.request
-        { method = "GET"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/week-dates?year=" ++ String.fromInt year ++ "&week=" ++ String.fromInt week
-        , body = Http.emptyBody
-        , expect = Http.expectJson WeekDatesReceived weekDatesDecoder
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-checkWeekHasEntries : String -> Int -> Int -> Cmd Msg
-checkWeekHasEntries token year week =
-    Http.request
-        { method = "GET"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/week-has-entries?year=" ++ String.fromInt year ++ "&week=" ++ String.fromInt week
-        , body = Http.emptyBody
-        , expect = Http.expectJson WeekHasEntriesReceived (field "has_entries" bool)
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-deleteWeekEntries : String -> Int -> Int -> Cmd Msg
-deleteWeekEntries token year week =
-    Http.request
-        { method = "DELETE"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/my-time-entries/week?year=" ++ String.fromInt year ++ "&week=" ++ String.fromInt week
-        , body = Http.emptyBody
-        , expect = Http.expectWhatever WeekEntriesDeleted
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-updateTimeEntry : String -> EditingTimeEntry -> Cmd Msg
-updateTimeEntry token entry =
-    Http.request
-        { method = "PUT"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/time-entries/" ++ String.fromInt entry.entryId
-        , body =
-            Http.jsonBody <|
-                Encode.object
-                    [ ( "date", Encode.string entry.date )
-                    , ( "start_time", Encode.string entry.startTime )
-                    , ( "end_time", Encode.string entry.endTime )
-                    , ( "type", Encode.string entry.entryType )
-                    ]
-        , expect = Http.expectWhatever TimeEntrySaved
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-deleteTimeEntry : String -> Int -> Cmd Msg
-deleteTimeEntry token entryId =
-    Http.request
-        { method = "DELETE"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/time-entries/" ++ String.fromInt entryId
-        , body = Http.emptyBody
-        , expect = Http.expectWhatever TimeEntryDeleted
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-createAdminTimeEntry : String -> AdminManualEntry -> Cmd Msg
-createAdminTimeEntry token entry =
-    case entry.selectedUserId of
-        Just userId ->
-            Http.request
-                { method = "POST"
-                , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-                , url = "/api/admin/time-entry"
-                , body =
-                    Http.jsonBody <|
-                        Encode.object
-                            [ ( "user_id", Encode.int userId )
-                            , ( "date", Encode.string entry.date )
-                            , ( "hours", Encode.float (String.toFloat entry.hours |> Maybe.withDefault 0) )
-                            , ( "type", Encode.string "manual" )
-                            ]
-                , expect = Http.expectWhatever AdminTimeEntrySaved
-                , timeout = Nothing
-                , tracker = Nothing
-                }
-
-        Nothing ->
-            Cmd.none
-
-
-fetchYearlyHoursSummary : String -> Cmd Msg
-fetchYearlyHoursSummary token =
-    Http.request
-        { method = "GET"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/yearly-hours-summary"
-        , body = Http.emptyBody
-        , expect = Http.expectJson YearlyHoursSummaryReceived (Decode.list yearlyHoursSummaryDecoder)
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-downloadYearlySummaryPDF : String -> Cmd Msg
-downloadYearlySummaryPDF token =
-    Http.request
-        { method = "GET"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/yearly-summary/pdf"
-        , body = Http.emptyBody
-        , expect =
-            Http.expectBytesResponse YearlySummaryPDFReceived
-                (\response ->
-                    case response of
-                        Http.GoodStatus_ _ body ->
-                            Ok body
-
-                        Http.BadUrl_ url ->
-                            Err (Http.BadUrl url)
-
-                        Http.Timeout_ ->
-                            Err Http.Timeout
-
-                        Http.NetworkError_ ->
-                            Err Http.NetworkError
-
-                        Http.BadStatus_ metadata _ ->
-                            Err (Http.BadStatus metadata.statusCode)
-                )
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-fetchWeeklyHours : String -> Cmd Msg
-fetchWeeklyHours token =
-    Http.request
-        { method = "GET"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/weekly-hours"
-        , body = Http.emptyBody
-        , expect = Http.expectJson WeeklyHoursReceived (Decode.list Api.Decoders.weeklyHoursDecoder)
-        , timeout = Nothing
-        , tracker = Nothing
-        }
diff --git a/frontend/src/Api/User.elm b/frontend/src/Api/User.elm
deleted file mode 100644
index 17c77ac..0000000
--- a/frontend/src/Api/User.elm
+++ /dev/null
@@ -1,110 +0,0 @@
-module Api.User exposing
-    ( createUser
-    , deleteUser
-    , fetchMyInfo
-    , fetchUsers
-    , resetUserPassword
-    , updateUserWorkHours
-    )
-
-import Api.Decoders exposing (userDecoder)
-import Http
-import Json.Decode as Decode
-import Json.Encode as Encode
-import Types.Model exposing (NewUser)
-import Types.Msg exposing (Msg(..))
-
-
-fetchUsers : String -> Cmd Msg
-fetchUsers token =
-    Http.request
-        { method = "GET"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/users/list"
-        , body = Http.emptyBody
-        , expect = Http.expectJson UsersReceived (Decode.list userDecoder)
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-fetchMyInfo : String -> Cmd Msg
-fetchMyInfo token =
-    Http.request
-        { method = "GET"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/my-info"
-        , body = Http.emptyBody
-        , expect = Http.expectJson MyInfoReceived userDecoder
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-createUser : String -> NewUser -> Cmd Msg
-createUser token user =
-    Http.request
-        { method = "POST"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/users"
-        , body =
-            Http.jsonBody <|
-                Encode.object
-                    [ ( "username", Encode.string user.username )
-                    , ( "password", Encode.string user.password )
-                    , ( "is_admin", Encode.bool user.isAdmin )
-                    ]
-        , expect = Http.expectWhatever UserCreated
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-deleteUser : String -> Int -> Cmd Msg
-deleteUser token userId =
-    Http.request
-        { method = "DELETE"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/users/delete?id=" ++ String.fromInt userId
-        , body = Http.emptyBody
-        , expect = Http.expectWhatever UserDeleted
-        , timeout = Nothing
-        , tracker = Nothing
-        }
-
-
-updateUserWorkHours : String -> Int -> String -> Cmd Msg
-updateUserWorkHours token userId hours =
-    case String.toFloat hours of
-        Just workHours ->
-            Http.request
-                { method = "PUT"
-                , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-                , url = "/api/admin/users/" ++ String.fromInt userId
-                , body =
-                    Http.jsonBody <|
-                        Encode.object
-                            [ ( "yearly_hours", Encode.float workHours ) ]
-                , expect = Http.expectWhatever UserWorkHoursSaved
-                , timeout = Nothing
-                , tracker = Nothing
-                }
-
-        Nothing ->
-            Cmd.none
-
-
-resetUserPassword : String -> Int -> String -> Cmd Msg
-resetUserPassword token userId newPassword =
-    Http.request
-        { method = "PUT"
-        , headers = [ Http.header "Authorization" ("Bearer " ++ token) ]
-        , url = "/api/admin/users/" ++ String.fromInt userId ++ "/reset-password"
-        , body =
-            Http.jsonBody <|
-                Encode.object
-                    [ ( "new_password", Encode.string newPassword ) ]
-        , expect = Http.expectWhatever ResetPasswordSaved
-        , timeout = Nothing
-        , tracker = Nothing
-        }
diff --git a/frontend/src/App.svelte b/frontend/src/App.svelte
new file mode 100644
index 0000000..3fa1604
--- /dev/null
+++ b/frontend/src/App.svelte
@@ -0,0 +1,60 @@
+<script>
+  import { auth } from './lib/stores';
+  import Login from './components/Login.svelte';
+  import UserDashboard from './components/UserDashboard.svelte';
+  import AdminDashboard from './components/AdminDashboard.svelte';
+  import ToastNotification from './components/ToastNotification.svelte';
+  import { onMount } from 'svelte';
+  import { addToast } from './lib/stores';
+
+  $: user = $auth.user;
+  $: isAuthenticated = $auth.isAuthenticated;
+
+  onMount(() => {
+  const darkModeMediaQuery = window.matchMedia('(prefers-color-scheme: dark)');
+
+    const applyTheme = (e) => {
+        const isDark = e.matches;
+        const theme = isDark ? 'night' : 'winter';
+        document.documentElement.setAttribute('data-theme', theme);
+    };
+
+    applyTheme(darkModeMediaQuery);
+
+    darkModeMediaQuery.addEventListener('change', applyTheme);
+    const handleRejection = (event) => {
+        console.error("Unerwarteter Fehler (Promise):", event.reason);
+        if (event.reason && event.reason.message !== 'Sitzung abgelaufen') {
+            addToast("Ein unerwarteter Fehler ist aufgetreten.", "error");
+        }
+    };
+
+    const handleError = (event) => {
+        console.error("Kritischer Fehler:", event.error);
+        addToast("Kritischer Anwendungsfehler. Bitte neu laden.", "error");
+    };
+
+    window.addEventListener('unhandledrejection', handleRejection);
+    window.addEventListener('error', handleError);
+
+    return () => {
+        window.removeEventListener('unhandledrejection', handleRejection);
+        window.removeEventListener('error', handleError);
+    };
+  });
+</script>
+
+<div class="app-container">
+  <ToastNotification />
+  
+  <main>
+    {#if !isAuthenticated}
+      <Login />
+    {:else if user?.isAdmin}
+      <AdminDashboard />
+    {:else}
+      <UserDashboard />
+    {/if}
+  </main>
+</div>
+
diff --git a/frontend/src/Main.elm b/frontend/src/Main.elm
deleted file mode 100644
index 6f29eab..0000000
--- a/frontend/src/Main.elm
+++ /dev/null
@@ -1,124 +0,0 @@
-module Main exposing (..)
-
-import Api.Auth exposing (..)
-import Api.Decoders exposing (..)
-import Api.Schedule exposing (..)
-import Api.SchoolYear exposing (..)
-import Api.TimeEntry exposing (..)
-import Api.User exposing (..)
-import Browser
-import Task
-import Time
-import Types.Model exposing (..)
-import Types.Msg exposing (Msg(..))
-import Types.Page exposing (..)
-import Update.Update exposing (update)
-import Utils.Ports exposing (..)
-import View.View exposing (view)
-
-
-
--- MAIN
-
-
-main : Program Flags Model Msg
-main =
-    Browser.element
-        { init = init
-        , update = update
-        , subscriptions = subscriptions
-        , view = view
-        }
-
-
-init : Flags -> ( Model, Cmd Msg )
-init flags =
-    let
-        initialPage =
-            case flags.token of
-                Just _ ->
-                    if flags.isAdmin then
-                        AdminDashboard
-
-                    else
-                        UserDashboard
-
-                Nothing ->
-                    LoginPage
-
-        model =
-            { page = initialPage
-            , activeTab = ScheduleTab
-            , username = ""
-            , password = ""
-            , token = flags.token
-            , isAdmin = flags.isAdmin
-            , schedules = []
-            , users = []
-            , timeEntries = []
-            , weeklyHours = []
-            , yearlyHoursSummary = []
-            , selectedEntries = []
-            , currentWeek = 1
-            , currentYear = 2025
-            , currentTime = Time.millisToPosix 0
-            , zone = Time.utc
-            , newSchedule = NewSchedule "" "" "" "lesson" ""
-            , newUser = NewUser "" "" False
-            , error = Nothing
-            , weekEditMode = False
-            , hasEntriesForCurrentWeek = False
-            , weekDates = Nothing
-            , userWeeklySummary = Nothing
-            , editingTimeEntryId = Nothing
-            , editingTimeEntry = EditingTimeEntry 0 "" "" "" ""
-            , editingUserId = Nothing
-            , editingUserWorkHours = ""
-            , resetPasswordUserId = Nothing
-            , resetPasswordNew = ""
-            , pendingDeleteId = Nothing
-            , selectedUserId = Nothing
-            , userWorkHoursInput = ""
-            , userPasswordInput = ""
-            , isProcessing = False
-            , mobileMenuOpen = False
-            , adminManualEntryForm = AdminManualEntry Nothing "" "" "manual"
-            , schoolYears = []
-            , newSchoolYear = NewSchoolYear "" "" ""
-            , activeSchoolYear = Nothing
-            , editingSchoolYearId = Nothing
-            , toasts = []
-            , nextToastId = 0
-            }
-
-        cmd =
-            case flags.token of
-                Just token ->
-                    Cmd.batch
-                        [ Task.perform SetTime Time.now
-                        , fetchSchedules (Just token)
-                        , fetchYearlyHoursSummary token
-                        , if flags.isAdmin then
-                            Cmd.batch
-                                [ fetchSchoolYears token
-                                , fetchUsers token
-                                , fetchAllTimeEntries token
-                                ]
-
-                          else
-                            fetchMyInfo token
-                        ]
-
-                Nothing ->
-                    Task.perform SetTime Time.now
-    in
-    ( model, cmd )
-
-
-
--- SUBSCRIPTIONS
-
-
-subscriptions : Model -> Sub Msg
-subscriptions model =
-    confirmDeleteResponse DeleteConfirmed
diff --git a/frontend/src/Ports.elm b/frontend/src/Ports.elm
deleted file mode 100644
index 4ede617..0000000
--- a/frontend/src/Ports.elm
+++ /dev/null
@@ -1,11 +0,0 @@
-port module Ports exposing (..)
-
-import Json.Encode as Encode
-
--- Outgoing Ports
-port saveToken : String -> Cmd msg
-port removeToken : () -> Cmd msg
-
--- Incoming Ports  
-port loadToken : (Maybe String -> msg) -> Sub msg
-
diff --git a/frontend/src/Types/Api.elm b/frontend/src/Types/Api.elm
deleted file mode 100644
index aae29d0..0000000
--- a/frontend/src/Types/Api.elm
+++ /dev/null
@@ -1,17 +0,0 @@
-module Types.Api exposing
-    ( ApiError
-    , LoginResult
-    )
-
-
-type alias LoginResult =
-    { token : String
-    , username : String
-    , isAdmin : Bool
-    }
-
-
-type alias ApiError =
-    { code : String
-    , message : String
-    }
diff --git a/frontend/src/Types/Model.elm b/frontend/src/Types/Model.elm
deleted file mode 100644
index 64911d6..0000000
--- a/frontend/src/Types/Model.elm
+++ /dev/null
@@ -1,218 +0,0 @@
-module Types.Model exposing
-    ( AdminManualEntry
-    , EditingTimeEntry
-    , Flags
-    , Model
-    , NewSchedule
-    , NewSchoolYear
-    , NewUser
-    , Schedule
-    , SchoolYear
-    , SelectedEntry
-    , TimeEntry
-    , Toast
-    , ToastType(..)
-    , User
-    , WeekDates
-    , WeeklyHours
-    , WeeklySummary
-    , YearlyHoursSummary
-    )
-
-import Time
-import Types.Page exposing (AdminTab, Page)
-
-
-type alias Model =
-    { page : Page
-    , activeTab : AdminTab
-    , username : String
-    , password : String
-    , token : Maybe String
-    , isAdmin : Bool
-    , schedules : List Schedule
-    , users : List User
-    , timeEntries : List TimeEntry
-    , weeklyHours : List WeeklyHours
-    , yearlyHoursSummary : List YearlyHoursSummary
-    , selectedEntries : List SelectedEntry
-    , currentWeek : Int
-    , currentYear : Int
-    , weekDates : Maybe WeekDates
-    , currentTime : Time.Posix
-    , zone : Time.Zone
-    , newSchedule : NewSchedule
-    , newUser : NewUser
-    , error : Maybe String
-    , weekEditMode : Bool
-    , hasEntriesForCurrentWeek : Bool
-    , userWeeklySummary : Maybe WeeklySummary
-    , editingTimeEntryId : Maybe Int
-    , editingTimeEntry : EditingTimeEntry
-    , editingUserId : Maybe Int
-    , editingUserWorkHours : String
-    , resetPasswordUserId : Maybe Int
-    , resetPasswordNew : String
-    , pendingDeleteId : Maybe Int
-    , selectedUserId : Maybe Int
-    , userWorkHoursInput : String
-    , userPasswordInput : String
-    , isProcessing : Bool
-    , mobileMenuOpen : Bool
-    , adminManualEntryForm : AdminManualEntry
-    , schoolYears : List SchoolYear
-    , newSchoolYear : NewSchoolYear
-    , activeSchoolYear : Maybe SchoolYear
-    , editingSchoolYearId : Maybe Int
-    , toasts : List Toast
-    , nextToastId : Int
-    }
-
-
-type ToastType
-    = ErrorToast
-    | SuccessToast
-    | InfoToast
-    | WarningToast
-
-
-type alias Toast =
-    { id : Int
-    , message : String
-    , toastType : ToastType
-    , dismissible : Bool
-    }
-
-
-type alias Flags =
-    { token : Maybe String
-    , isAdmin : Bool
-    }
-
-
-type alias Schedule =
-    { id : Int
-    , dayOfWeek : Int
-    , startTime : String
-    , endTime : String
-    , scheduleType : String
-    , title : String
-    }
-
-
-type alias User =
-    { id : Int
-    , username : String
-    , isAdmin : Bool
-    , yearlyWorkHours : Float
-    }
-
-
-type alias TimeEntry =
-    { id : Int
-    , userId : Int
-    , scheduleId : Int
-    , date : String
-    , entryType : String
-    , username : String
-    , startTime : String
-    , endTime : String
-    }
-
-
-type alias SelectedEntry =
-    { scheduleId : Int
-    , dayOfWeek : Int
-    }
-
-
-type alias NewSchedule =
-    { dayOfWeek : String
-    , startTime : String
-    , endTime : String
-    , scheduleType : String
-    , title : String
-    }
-
-
-type alias NewUser =
-    { username : String
-    , password : String
-    , isAdmin : Bool
-    }
-
-
-type alias WeekDates =
-    { year : Int
-    , week : Int
-    , dates : List ( String, String )
-    , range : String
-    }
-
-
-type alias WeeklySummary =
-    { userId : Int
-    , username : String
-    , year : Int
-    , week : Int
-    , totalHours : Float
-    , targetHours : Float
-    , remainingHours : Float
-    }
-
-
-type alias EditingTimeEntry =
-    { entryId : Int
-    , date : String
-    , startTime : String
-    , endTime : String
-    , entryType : String
-    }
-
-
-type alias WeeklyHours =
-    { userId : Int
-    , username : String
-    , year : Int
-    , week : Int
-    , totalHours : Float
-    , targetHours : Float
-    , remainingHours : Float
-    }
-
-
-type alias YearlyHoursSummary =
-    { userId : Int
-    , username : String
-    , year : Int
-    , week : Int
-    , totalHours : Float
-    , yearlyTarget : Float
-    , yearlyActual : Float
-    , weeklyTarget : Float
-    , remainingYearly : Float
-    }
-
-
-type alias AdminManualEntry =
-    { selectedUserId : Maybe Int
-    , date : String
-    , hours : String
-    , entryType : String
-    }
-
-
-type alias SchoolYear =
-    { id : Int
-    , name : String
-    , startDate : String
-    , endDate : String
-    , isActive : Bool
-    }
-
-
-type alias NewSchoolYear =
-    { name : String
-    , startDate : String
-    , endDate : String
-    }
diff --git a/frontend/src/Types/Msg.elm b/frontend/src/Types/Msg.elm
deleted file mode 100644
index 4158571..0000000
--- a/frontend/src/Types/Msg.elm
+++ /dev/null
@@ -1,133 +0,0 @@
-module Types.Msg exposing (Msg(..))
-
-import Bytes exposing (Bytes)
-import Http
-import Time
-import Types.Api exposing (LoginResult)
-import Types.Model
-    exposing
-        ( Schedule
-        , SchoolYear
-        , TimeEntry
-        , ToastType(..)
-        , User
-        , WeekDates
-        , WeeklyHours
-        , WeeklySummary
-        , YearlyHoursSummary
-        )
-import Types.Page exposing (AdminTab)
-
-
-type Msg
-    = UpdateUsername String
-    | UpdatePassword String
-    | Login
-    | LoginResponse (Result Http.Error LoginResult)
-    | Logout
-    | SetTime Time.Posix
-    | FetchSchedules
-    | SchedulesReceived (Result Http.Error (List Schedule))
-    | ToggleScheduleSelection Int Int
-    | SaveTimeEntries
-    | TimeEntriesSaved (Result Http.Error ())
-    | PreviousWeek
-    | NextWeek
-    | EnableEditMode
-    | DisableEditMode
-    | DeleteWeekEntries
-    | WeekEntriesDeleted (Result Http.Error ())
-    | SwitchTab AdminTab
-    | UpdateNewScheduleDay String
-    | UpdateNewScheduleStart String
-    | UpdateNewScheduleEnd String
-    | UpdateNewScheduleType String
-    | UpdateNewScheduleTitle String
-    | CreateSchedule
-    | ScheduleCreated (Result Http.Error ())
-    | DeleteSchedule Int
-    | ScheduleDeleted (Result Http.Error ())
-    | UpdateNewUsername String
-    | UpdateNewPassword String
-    | UpdateNewUserAdmin Bool
-    | CreateUser
-    | UserCreated (Result Http.Error ())
-    | DeleteUser Int
-    | UserDeleted (Result Http.Error ())
-    | FetchUsers
-    | UsersReceived (Result Http.Error (List User))
-    | FetchMyTimeEntries
-    | MyTimeEntriesReceived (Result Http.Error (List TimeEntry))
-    | FetchAllTimeEntries
-    | AllTimeEntriesReceived (Result Http.Error (List TimeEntry))
-    | FetchWeeklyHours
-    | WeeklyHoursReceived (Result Http.Error (List WeeklyHours))
-    | FetchYearlyHoursSummary
-    | YearlyHoursSummaryReceived (Result Http.Error (List YearlyHoursSummary))
-    | FetchWeekDates
-    | WeekDatesReceived (Result Http.Error WeekDates)
-    | CheckWeekHasEntries
-    | WeekHasEntriesReceived (Result Http.Error Bool)
-    | MyWeeklySummaryReceived (Result Http.Error WeeklySummary)
-    | EditTimeEntry Int
-    | CancelEditTimeEntry
-    | UpdateEditTimeEntryDate String
-    | UpdateEditTimeEntryStartTime String
-    | UpdateEditTimeEntryEndTime String
-    | UpdateEditTimeEntryType String
-    | SaveEditTimeEntry
-    | TimeEntrySaved (Result Http.Error ())
-    | TimeEntryDeleted (Result Http.Error ())
-    | EditUserWorkHours Int
-    | CancelEditUserWorkHours
-    | UpdateEditUserWorkHours String
-    | SaveUserWorkHours
-    | UserWorkHoursSaved (Result Http.Error ())
-    | ResetUserPassword Int
-    | CancelResetPassword
-    | UpdateResetPasswordNew String
-    | SaveResetPassword
-    | ResetPasswordSaved (Result Http.Error ())
-    | ConfirmDeleteTimeEntry Int
-    | ConfirmDeleteUser Int
-    | DeleteConfirmed Bool
-    | StartEditingTimeEntry Int TimeEntry
-    | CancelEditingTimeEntry
-    | UpdateEditingTimeEntryDate String
-    | UpdateEditingTimeEntryStartTime String
-    | UpdateEditingTimeEntryEndTime String
-    | UpdateEditingTimeEntryType String
-    | SaveEditingTimeEntry
-    | SelectUserForManagement Int
-    | UpdateUserWorkHours String
-    | UpdateUserPassword String
-    | SaveUserPassword
-    | UserPasswordSaved (Result Http.Error ())
-    | ToggleMobileMenu
-    | CloseMobileMenu
-    | SelectUserForManualEntry Int
-    | UpdateManualEntryDate String
-    | UpdateManualEntryHours String
-    | UpdateManualEntryType String
-    | SaveAdminTimeEntry
-    | AdminTimeEntrySaved (Result Http.Error ())
-    | FetchMyInfo
-    | MyInfoReceived (Result Http.Error User)
-    | FetchSchoolYears
-    | SchoolYearsReceived (Result Http.Error (List SchoolYear))
-    | FetchActiveSchoolYear
-    | ActiveSchoolYearReceived (Result Http.Error SchoolYear)
-    | UpdateNewSchoolYearName String
-    | UpdateNewSchoolYearStart String
-    | UpdateNewSchoolYearEnd String
-    | CreateSchoolYear
-    | SchoolYearCreated (Result Http.Error ())
-    | ActivateSchoolYear Int
-    | SchoolYearActivated (Result Http.Error ())
-    | DeleteSchoolYear Int
-    | SchoolYearDeleted (Result Http.Error ())
-    | DownloadYearlySummaryPDF
-    | YearlySummaryPDFReceived (Result Http.Error Bytes)
-    | ShowToast String ToastType
-    | DismissToast Int
-    | AutoDismissToast Int
diff --git a/frontend/src/Types/Page.elm b/frontend/src/Types/Page.elm
deleted file mode 100644
index 5b41054..0000000
--- a/frontend/src/Types/Page.elm
+++ /dev/null
@@ -1,17 +0,0 @@
-module Types.Page exposing
-    ( AdminTab(..)
-    , Page(..)
-    )
-
-
-type Page
-    = LoginPage
-    | UserDashboard
-    | AdminDashboard
-
-
-type AdminTab
-    = ScheduleTab
-    | UsersTab
-    | TimeEntriesTab
-    | SchoolYearsTab
diff --git a/frontend/src/Update/AuthUpdate.elm b/frontend/src/Update/AuthUpdate.elm
deleted file mode 100644
index 20a1fbc..0000000
--- a/frontend/src/Update/AuthUpdate.elm
+++ /dev/null
@@ -1,115 +0,0 @@
-module Update.AuthUpdate exposing
-    ( handleLogin
-    , handleLoginResponse
-    , handleLogout
-    )
-
-import Api.Auth
-import Api.Schedule
-import Api.SchoolYear
-import Api.TimeEntry
-import Api.User
-import Http
-import Json.Encode as Encode
-import Task
-import Types.Model exposing (Model, ToastType(..))
-import Types.Msg exposing (Msg(..))
-import Types.Page exposing (Page(..))
-import Utils.DateUtils exposing (getISOWeekFromPosix)
-import Utils.Ports exposing (removeToken, saveToken)
-
-
-handleLogin : Model -> ( Model, Cmd Msg )
-handleLogin model =
-    if model.isProcessing then
-        ( model, Cmd.none )
-
-    else
-        ( { model | isProcessing = True }, Api.Auth.loginRequest model.username model.password )
-
-
-handleLoginResponse : Result Http.Error { token : String, username : String, isAdmin : Bool } -> Model -> ( Model, Cmd Msg )
-handleLoginResponse result model =
-    case result of
-        Ok loginResult ->
-            let
-                newPage =
-                    if loginResult.isAdmin then
-                        AdminDashboard
-
-                    else
-                        UserDashboard
-
-                ( year, week ) =
-                    getISOWeekFromPosix model.currentTime
-
-                tokenData =
-                    Encode.object
-                        [ ( "token", Encode.string loginResult.token )
-                        , ( "isAdmin", Encode.bool loginResult.isAdmin )
-                        ]
-            in
-            ( { model
-                | token = Just loginResult.token
-                , username = loginResult.username
-                , isAdmin = loginResult.isAdmin
-                , page = newPage
-                , error = Nothing
-                , isProcessing = False
-              }
-            , Cmd.batch
-                [ saveToken tokenData
-                , Api.Schedule.fetchSchedules (Just loginResult.token)
-                , Task.perform (\_ -> ShowToast ("Willkommen, " ++ loginResult.username ++ "!") SuccessToast) (Task.succeed ())
-                , if not loginResult.isAdmin then
-                    Cmd.batch
-                        [ Api.TimeEntry.fetchMyTimeEntries loginResult.token
-                        , Api.TimeEntry.fetchWeekDates loginResult.token year week
-                        , Api.TimeEntry.checkWeekHasEntries loginResult.token year week
-                        , Api.TimeEntry.fetchYearlyHoursSummary loginResult.token
-                        , Api.User.fetchMyInfo loginResult.token
-                        ]
-
-                  else
-                    Cmd.batch
-                        [ Api.TimeEntry.fetchMyTimeEntries loginResult.token
-                        , Api.TimeEntry.fetchWeekDates loginResult.token year week
-                        , Api.TimeEntry.checkWeekHasEntries loginResult.token year week
-                        , Api.TimeEntry.fetchYearlyHoursSummary loginResult.token
-                        ]
-                ]
-            )
-
-        Err err ->
-            let
-                errorMsg =
-                    case err of
-                        Http.BadStatus 401 ->
-                            "Benutzername oder Passwort ungültig"
-
-                        Http.Timeout ->
-                            "Zeitüberschreitung - bitte erneut versuchen"
-
-                        Http.NetworkError ->
-                            "Netzwerkfehler - bitte Verbindung prüfen"
-
-                        _ ->
-                            "Anmeldung fehlgeschlagen"
-            in
-            ( { model | isProcessing = False }
-            , Task.perform (\_ -> ShowToast errorMsg ErrorToast) (Task.succeed ())
-            )
-
-
-handleLogout : Model -> ( Model, Cmd Msg )
-handleLogout model =
-    ( { model
-        | page = LoginPage
-        , token = Nothing
-        , isAdmin = False
-        , username = ""
-        , password = ""
-        , isProcessing = False
-      }
-    , removeToken ()
-    )
diff --git a/frontend/src/Update/ScheduleUpdate.elm b/frontend/src/Update/ScheduleUpdate.elm
deleted file mode 100644
index 2312e13..0000000
--- a/frontend/src/Update/ScheduleUpdate.elm
+++ /dev/null
@@ -1,244 +0,0 @@
-module Update.ScheduleUpdate exposing
-    ( handleCreateSchedule
-    , handleDeleteSchedule
-    , handleDeleteWeekEntries
-    , handleDisableEditMode
-    , handleEnableEditMode
-    , handleSaveTimeEntries
-    , handleScheduleCreated
-    , handleScheduleDeleted
-    , handleSchedulesReceived
-    , handleTimeEntriesSaved
-    , handleToggleScheduleSelection
-    , handleWeekEntriesDeleted
-    )
-
-import Api.Schedule
-import Api.TimeEntry
-import Http
-import Task
-import Types.Model exposing (Model, NewSchedule, Schedule, SelectedEntry, ToastType(..))
-import Types.Msg exposing (Msg(..))
-import Utils.DateUtils exposing (getDayOfWeek, getYearWeekFromDate)
-
-
-handleToggleScheduleSelection : Int -> Int -> Model -> ( Model, Cmd Msg )
-handleToggleScheduleSelection scheduleId dayOfWeek model =
-    let
-        entry =
-            { scheduleId = scheduleId, dayOfWeek = dayOfWeek }
-
-        newSelected =
-            if List.any (\e -> e.scheduleId == scheduleId && e.dayOfWeek == dayOfWeek) model.selectedEntries then
-                List.filter (\e -> not (e.scheduleId == scheduleId && e.dayOfWeek == dayOfWeek)) model.selectedEntries
-
-            else
-                entry :: model.selectedEntries
-    in
-    ( { model | selectedEntries = newSelected }, Cmd.none )
-
-
-handleSaveTimeEntries : Model -> ( Model, Cmd Msg )
-handleSaveTimeEntries model =
-    case model.token of
-        Just token ->
-            ( { model | error = Nothing }
-            , Api.Schedule.saveTimeEntriesForWeek token model.selectedEntries model.currentYear model.currentWeek model.schedules model.weekDates
-            )
-
-        Nothing ->
-            ( model, Cmd.none )
-
-
-handleTimeEntriesSaved : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleTimeEntriesSaved result model =
-    case result of
-        Ok _ ->
-            case model.token of
-                Just token ->
-                    ( { model
-                        | error = Nothing
-                        , weekEditMode = False
-                        , hasEntriesForCurrentWeek = True
-                      }
-                    , Cmd.batch
-                        [ Api.TimeEntry.fetchMyTimeEntries token
-                        , Task.perform (\_ -> ShowToast "Zeiteinträge erfolgreich gespeichert!" SuccessToast) (Task.succeed ())
-                        ]
-                    )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Err err ->
-            ( model, Cmd.none )
-
-
-handleEnableEditMode : Model -> ( Model, Cmd Msg )
-handleEnableEditMode model =
-    let
-        currentWeekEntries =
-            List.filter
-                (\e ->
-                    let
-                        ( entryYear, entryWeek ) =
-                            getYearWeekFromDate e.date
-                    in
-                    entryWeek == model.currentWeek && entryYear == model.currentYear
-                )
-                model.timeEntries
-
-        preSelectedEntries =
-            List.map
-                (\entry ->
-                    let
-                        parts =
-                            String.split "-" entry.date
-
-                        year =
-                            parts |> List.head |> Maybe.andThen String.toInt |> Maybe.withDefault 2025
-
-                        month =
-                            parts |> List.drop 1 |> List.head |> Maybe.andThen String.toInt |> Maybe.withDefault 1
-
-                        day =
-                            parts |> List.drop 2 |> List.head |> Maybe.andThen String.toInt |> Maybe.withDefault 1
-
-                        dayOfWeek =
-                            getDayOfWeek year month day
-                    in
-                    { scheduleId = entry.scheduleId, dayOfWeek = dayOfWeek }
-                )
-                currentWeekEntries
-    in
-    ( { model
-        | weekEditMode = True
-        , selectedEntries = preSelectedEntries
-      }
-    , Cmd.none
-    )
-
-
-handleDisableEditMode : Model -> ( Model, Cmd Msg )
-handleDisableEditMode model =
-    ( { model | weekEditMode = False }, Cmd.none )
-
-
-handleDeleteWeekEntries : Model -> ( Model, Cmd Msg )
-handleDeleteWeekEntries model =
-    case model.token of
-        Just token ->
-            ( model, Api.TimeEntry.deleteWeekEntries token model.currentYear model.currentWeek )
-
-        Nothing ->
-            ( model, Cmd.none )
-
-
-handleWeekEntriesDeleted : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleWeekEntriesDeleted result model =
-    case result of
-        Ok _ ->
-            case model.token of
-                Just token ->
-                    ( { model
-                        | weekEditMode = True
-                        , selectedEntries = []
-                        , hasEntriesForCurrentWeek = False
-                      }
-                    , Cmd.batch
-                        [ Api.TimeEntry.fetchMyTimeEntries token
-                        , Task.perform (\_ -> ShowToast "Wocheneinträge erfolgreich gelöscht" SuccessToast) (Task.succeed ())
-                        ]
-                    )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Err err ->
-            ( model, Cmd.none )
-
-
-handleCreateSchedule : Model -> ( Model, Cmd Msg )
-handleCreateSchedule model =
-    if
-        String.isEmpty model.newSchedule.dayOfWeek
-            || String.isEmpty model.newSchedule.startTime
-            || String.isEmpty model.newSchedule.endTime
-    then
-        ( model, Task.perform (\_ -> ShowToast "Bitte alle Felder ausfüllen" WarningToast) (Task.succeed ()) )
-
-    else
-        case model.token of
-            Just token ->
-                ( { model | isProcessing = True }, Api.Schedule.createSchedule token model.newSchedule )
-
-            Nothing ->
-                ( model, Cmd.none )
-
-
-handleScheduleCreated : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleScheduleCreated result model =
-    case result of
-        Ok _ ->
-            case model.token of
-                Just token ->
-                    let
-                        emptySchedule =
-                            NewSchedule "" "" "" "lesson" ""
-                    in
-                    ( { model
-                        | newSchedule = emptySchedule
-                        , error = Nothing
-                        , isProcessing = False
-                      }
-                    , Cmd.batch
-                        [ Api.Schedule.fetchSchedules model.token
-                        , Task.perform (\_ -> ShowToast "Stundenplan erfolgreich erstellt!" SuccessToast) (Task.succeed ())
-                        ]
-                    )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Err err ->
-            ( { model | isProcessing = False }, Cmd.none )
-
-
-handleDeleteSchedule : Int -> Model -> ( Model, Cmd Msg )
-handleDeleteSchedule scheduleId model =
-    case model.token of
-        Just token ->
-            ( model, Api.Schedule.deleteSchedule token scheduleId )
-
-        Nothing ->
-            ( model, Cmd.none )
-
-
-handleScheduleDeleted : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleScheduleDeleted result model =
-    case result of
-        Ok _ ->
-            case model.token of
-                Just token ->
-                    ( { model | error = Nothing }
-                    , Cmd.batch
-                        [ Api.Schedule.fetchSchedules (Just token)
-                        , Task.perform (\_ -> ShowToast "Stundenplan erfolgreich gelöscht" SuccessToast) (Task.succeed ())
-                        ]
-                    )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Err err ->
-            ( model, Cmd.none )
-
-
-handleSchedulesReceived : Result Http.Error (List Schedule) -> Model -> ( Model, Cmd Msg )
-handleSchedulesReceived result model =
-    case result of
-        Ok schedules ->
-            ( { model | schedules = schedules }, Cmd.none )
-
-        Err err ->
-            ( model, Cmd.none )
diff --git a/frontend/src/Update/SchoolYearUpdate.elm b/frontend/src/Update/SchoolYearUpdate.elm
deleted file mode 100644
index 0de741d..0000000
--- a/frontend/src/Update/SchoolYearUpdate.elm
+++ /dev/null
@@ -1,139 +0,0 @@
-module Update.SchoolYearUpdate exposing
-    ( handleActivateSchoolYear
-    , handleActiveSchoolYearReceived
-    , handleCreateSchoolYear
-    , handleDeleteSchoolYear
-    , handleSchoolYearActivated
-    , handleSchoolYearCreated
-    , handleSchoolYearDeleted
-    , handleSchoolYearsReceived
-    )
-
-import Api.SchoolYear
-import Http
-import Task
-import Types.Model exposing (Model, NewSchoolYear, SchoolYear, ToastType(..))
-import Types.Msg exposing (Msg(..))
-
-
-handleCreateSchoolYear : Model -> ( Model, Cmd Msg )
-handleCreateSchoolYear model =
-    if
-        String.isEmpty model.newSchoolYear.name
-            || String.isEmpty model.newSchoolYear.startDate
-            || String.isEmpty model.newSchoolYear.endDate
-    then
-        ( model, Task.perform (\_ -> ShowToast "Bitte alle Felder ausfüllen" WarningToast) (Task.succeed ()) )
-
-    else
-        case model.token of
-            Just token ->
-                ( { model | isProcessing = True }, Api.SchoolYear.createSchoolYear token model.newSchoolYear )
-
-            Nothing ->
-                ( model, Cmd.none )
-
-
-handleSchoolYearCreated : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleSchoolYearCreated result model =
-    case result of
-        Ok _ ->
-            case model.token of
-                Just token ->
-                    ( { model
-                        | newSchoolYear = NewSchoolYear "" "" ""
-                        , error = Nothing
-                        , isProcessing = False
-                      }
-                    , Cmd.batch
-                        [ Api.SchoolYear.fetchSchoolYears token
-                        , Task.perform (\_ -> ShowToast "Schuljahr erfolgreich erstellt!" SuccessToast) (Task.succeed ())
-                        ]
-                    )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Err err ->
-            ( { model | isProcessing = False }, Cmd.none )
-
-
-handleActivateSchoolYear : Int -> Model -> ( Model, Cmd Msg )
-handleActivateSchoolYear id model =
-    case model.token of
-        Just token ->
-            ( model, Api.SchoolYear.activateSchoolYear token id )
-
-        Nothing ->
-            ( model, Cmd.none )
-
-
-handleSchoolYearActivated : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleSchoolYearActivated result model =
-    case result of
-        Ok _ ->
-            case model.token of
-                Just token ->
-                    ( { model | error = Nothing }
-                    , Cmd.batch
-                        [ Api.SchoolYear.fetchSchoolYears token
-                        , Api.SchoolYear.fetchActiveSchoolYear token
-                        , Task.perform (\_ -> ShowToast "Schuljahr erfolgreich aktiviert!" SuccessToast) (Task.succeed ())
-                        ]
-                    )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Err err ->
-            ( model, Cmd.none )
-
-
-handleDeleteSchoolYear : Int -> Model -> ( Model, Cmd Msg )
-handleDeleteSchoolYear id model =
-    case model.token of
-        Just token ->
-            ( model, Api.SchoolYear.deleteSchoolYear token id )
-
-        Nothing ->
-            ( model, Cmd.none )
-
-
-handleSchoolYearDeleted : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleSchoolYearDeleted result model =
-    case result of
-        Ok _ ->
-            case model.token of
-                Just token ->
-                    ( { model | error = Nothing }
-                    , Cmd.batch
-                        [ Api.SchoolYear.fetchSchoolYears token
-                        , Task.perform (\_ -> ShowToast "Schuljahr erfolgreich gelöscht" SuccessToast) (Task.succeed ())
-                        ]
-                    )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Err err ->
-            ( model, Cmd.none )
-
-
-handleSchoolYearsReceived : Result Http.Error (List SchoolYear) -> Model -> ( Model, Cmd Msg )
-handleSchoolYearsReceived result model =
-    case result of
-        Ok years ->
-            ( { model | schoolYears = years }, Cmd.none )
-
-        Err err ->
-            ( model, Cmd.none )
-
-
-handleActiveSchoolYearReceived : Result Http.Error SchoolYear -> Model -> ( Model, Cmd Msg )
-handleActiveSchoolYearReceived result model =
-    case result of
-        Ok year ->
-            ( { model | activeSchoolYear = Just year }, Cmd.none )
-
-        Err _ ->
-            ( { model | activeSchoolYear = Nothing }, Cmd.none )
diff --git a/frontend/src/Update/TimeEntryUpdate.elm b/frontend/src/Update/TimeEntryUpdate.elm
deleted file mode 100644
index a794944..0000000
--- a/frontend/src/Update/TimeEntryUpdate.elm
+++ /dev/null
@@ -1,189 +0,0 @@
-module Update.TimeEntryUpdate exposing
-    ( handleAdminTimeEntrySaved
-    , handleAllTimeEntriesReceived
-    , handleConfirmDeleteTimeEntry
-    , handleEditTimeEntry
-    , handleMyTimeEntriesReceived
-    , handleSaveAdminTimeEntry
-    , handleSaveEditTimeEntry
-    , handleTimeEntryDeleted
-    , handleTimeEntrySaved
-    , handleYearlyHoursSummaryReceived
-    )
-
-import Api.TimeEntry
-import Http
-import Task
-import Types.Model exposing (AdminManualEntry, EditingTimeEntry, Model, TimeEntry, ToastType(..), YearlyHoursSummary)
-import Types.Msg exposing (Msg(..))
-import Utils.DateUtils exposing (getYearWeekFromDate)
-import Utils.Ports exposing (confirmDelete)
-
-
-handleMyTimeEntriesReceived : Result Http.Error (List TimeEntry) -> Model -> ( Model, Cmd Msg )
-handleMyTimeEntriesReceived result model =
-    case result of
-        Ok entries ->
-            let
-                hasEntries =
-                    List.any
-                        (\e ->
-                            let
-                                ( entryYear, entryWeek ) =
-                                    getYearWeekFromDate e.date
-                            in
-                            entryWeek == model.currentWeek && entryYear == model.currentYear
-                        )
-                        entries
-            in
-            ( { model
-                | timeEntries = entries
-                , hasEntriesForCurrentWeek = hasEntries
-                , weekEditMode = False
-              }
-            , Cmd.none
-            )
-
-        Err err ->
-            ( model, Cmd.none )
-
-
-handleAllTimeEntriesReceived : Result Http.Error (List TimeEntry) -> Model -> ( Model, Cmd Msg )
-handleAllTimeEntriesReceived result model =
-    case result of
-        Ok entries ->
-            ( { model | timeEntries = entries }, Cmd.none )
-
-        Err err ->
-            ( model, Cmd.none )
-
-
-handleEditTimeEntry : Int -> Model -> ( Model, Cmd Msg )
-handleEditTimeEntry entryId model =
-    case List.filter (\e -> e.id == entryId) model.timeEntries |> List.head of
-        Just entry ->
-            ( { model
-                | editingTimeEntryId = Just entryId
-                , editingTimeEntry =
-                    { entryId = entryId
-                    , date = entry.date
-                    , startTime = entry.startTime
-                    , endTime = entry.endTime
-                    , entryType = entry.entryType
-                    }
-              }
-            , Cmd.none
-            )
-
-        Nothing ->
-            ( model, Cmd.none )
-
-
-handleSaveEditTimeEntry : Model -> ( Model, Cmd Msg )
-handleSaveEditTimeEntry model =
-    case model.token of
-        Just token ->
-            ( model, Api.TimeEntry.updateTimeEntry token model.editingTimeEntry )
-
-        Nothing ->
-            ( model, Cmd.none )
-
-
-handleTimeEntrySaved : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleTimeEntrySaved result model =
-    case result of
-        Ok _ ->
-            case model.token of
-                Just token ->
-                    ( { model
-                        | editingTimeEntryId = Nothing
-                        , pendingDeleteId = Nothing
-                        , error = Nothing
-                      }
-                    , Cmd.batch
-                        [ Api.TimeEntry.fetchAllTimeEntries token
-                        , Task.perform (\_ -> ShowToast "Zeiteintrag erfolgreich gespeichert!" SuccessToast) (Task.succeed ())
-                        ]
-                    )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Err err ->
-            ( model, Cmd.none )
-
-
-handleTimeEntryDeleted : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleTimeEntryDeleted result model =
-    case result of
-        Ok _ ->
-            case model.token of
-                Just token ->
-                    ( { model
-                        | editingTimeEntryId = Nothing
-                        , editingTimeEntry = EditingTimeEntry 0 "" "" "" "lesson"
-                        , pendingDeleteId = Nothing
-                        , error = Nothing
-                      }
-                    , Cmd.batch
-                        [ Api.TimeEntry.fetchAllTimeEntries token
-                        , Api.TimeEntry.fetchYearlyHoursSummary token
-                        , Task.perform (\_ -> ShowToast "Zeiteintrag erfolgreich gelöscht" SuccessToast) (Task.succeed ())
-                        ]
-                    )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Err err ->
-            ( { model | pendingDeleteId = Nothing }, Cmd.none )
-
-
-handleConfirmDeleteTimeEntry : Int -> Model -> ( Model, Cmd Msg )
-handleConfirmDeleteTimeEntry entryId model =
-    ( { model | pendingDeleteId = Just entryId }, confirmDelete "Soll dieser Zeiteintrag gelöscht werden?" )
-
-
-handleSaveAdminTimeEntry : Model -> ( Model, Cmd Msg )
-handleSaveAdminTimeEntry model =
-    case model.token of
-        Just token ->
-            ( { model | isProcessing = True }, Api.TimeEntry.createAdminTimeEntry token model.adminManualEntryForm )
-
-        Nothing ->
-            ( model, Cmd.none )
-
-
-handleAdminTimeEntrySaved : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleAdminTimeEntrySaved result model =
-    case result of
-        Ok _ ->
-            case model.token of
-                Just token ->
-                    ( { model
-                        | adminManualEntryForm = AdminManualEntry Nothing "" "" "manual"
-                        , error = Nothing
-                        , isProcessing = False
-                      }
-                    , Cmd.batch
-                        [ Api.TimeEntry.fetchAllTimeEntries token
-                        , Api.TimeEntry.fetchYearlyHoursSummary token
-                        , Task.perform (\_ -> ShowToast "Manueller Eintrag erfolgreich erstellt!" SuccessToast) (Task.succeed ())
-                        ]
-                    )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Err err ->
-            ( { model | isProcessing = False }, Cmd.none )
-
-
-handleYearlyHoursSummaryReceived : Result Http.Error (List YearlyHoursSummary) -> Model -> ( Model, Cmd Msg )
-handleYearlyHoursSummaryReceived result model =
-    case result of
-        Ok summary ->
-            ( { model | yearlyHoursSummary = summary }, Cmd.none )
-
-        Err err ->
-            ( model, Cmd.none )
diff --git a/frontend/src/Update/Update.elm b/frontend/src/Update/Update.elm
deleted file mode 100644
index f384b8c..0000000
--- a/frontend/src/Update/Update.elm
+++ /dev/null
@@ -1,811 +0,0 @@
-module Update.Update exposing (update)
-
-import Api.Schedule
-import Api.SchoolYear
-import Api.TimeEntry
-import Api.User
-import File.Download
-import Process
-import Task
-import Time
-import Types.Model exposing (EditingTimeEntry, Model, NewUser, ToastType(..))
-import Types.Msg exposing (Msg(..))
-import Types.Page exposing (AdminTab(..), Page(..))
-import Update.AuthUpdate as Auth
-import Update.ScheduleUpdate as Schedule
-import Update.SchoolYearUpdate as SchoolYear
-import Update.TimeEntryUpdate as TimeEntry
-import Update.UserUpdate as User
-import Utils.DateUtils exposing (getISOWeekFromPosix, nextWeek, previousWeek)
-import Utils.Ports
-
-
-update : Msg -> Model -> ( Model, Cmd Msg )
-update msg model =
-    case msg of
-        -- Mobile Menu
-        ToggleMobileMenu ->
-            ( { model | mobileMenuOpen = not model.mobileMenuOpen }, Cmd.none )
-
-        CloseMobileMenu ->
-            ( { model | mobileMenuOpen = False }, Cmd.none )
-
-        -- Auth
-        UpdateUsername username ->
-            ( { model | username = username }, Cmd.none )
-
-        UpdatePassword password ->
-            ( { model | password = password }, Cmd.none )
-
-        Login ->
-            Auth.handleLogin model
-
-        LoginResponse result ->
-            Auth.handleLoginResponse result model
-
-        Logout ->
-            Auth.handleLogout model
-
-        -- Time
-        SetTime time ->
-            let
-                ( year, week ) =
-                    getISOWeekFromPosix time
-
-                cmds =
-                    case model.token of
-                        Just token ->
-                            if model.page == UserDashboard || model.page == LoginPage then
-                                Cmd.batch
-                                    [ Api.TimeEntry.checkWeekHasEntries token year week
-                                    , Api.TimeEntry.fetchWeekDates token year week
-                                    , Api.TimeEntry.fetchMyTimeEntries token
-                                    ]
-
-                            else
-                                Cmd.none
-
-                        Nothing ->
-                            Cmd.none
-            in
-            ( { model
-                | currentTime = time
-                , currentWeek = week
-                , currentYear = year
-              }
-            , cmds
-            )
-
-        -- Schedules
-        FetchSchedules ->
-            ( model, Api.Schedule.fetchSchedules model.token )
-
-        SchedulesReceived result ->
-            Schedule.handleSchedulesReceived result model
-
-        ToggleScheduleSelection scheduleId dayOfWeek ->
-            Schedule.handleToggleScheduleSelection scheduleId dayOfWeek model
-
-        SaveTimeEntries ->
-            Schedule.handleSaveTimeEntries model
-
-        TimeEntriesSaved result ->
-            Schedule.handleTimeEntriesSaved result model
-
-        EnableEditMode ->
-            Schedule.handleEnableEditMode model
-
-        DisableEditMode ->
-            Schedule.handleDisableEditMode model
-
-        DeleteWeekEntries ->
-            Schedule.handleDeleteWeekEntries model
-
-        WeekEntriesDeleted result ->
-            Schedule.handleWeekEntriesDeleted result model
-
-        CreateSchedule ->
-            Schedule.handleCreateSchedule model
-
-        ScheduleCreated result ->
-            Schedule.handleScheduleCreated result model
-
-        DeleteSchedule scheduleId ->
-            Schedule.handleDeleteSchedule scheduleId model
-
-        ScheduleDeleted result ->
-            Schedule.handleScheduleDeleted result model
-
-        -- Week Navigation
-        PreviousWeek ->
-            let
-                ( newYear, newWeek ) =
-                    previousWeek model.currentYear model.currentWeek
-            in
-            ( { model
-                | currentWeek = newWeek
-                , currentYear = newYear
-                , selectedEntries = []
-                , weekEditMode = False
-              }
-            , case model.token of
-                Just token ->
-                    Cmd.batch
-                        [ Api.TimeEntry.fetchWeekDates token newYear newWeek
-                        , Api.TimeEntry.checkWeekHasEntries token newYear newWeek
-                        ]
-
-                Nothing ->
-                    Cmd.none
-            )
-
-        NextWeek ->
-            let
-                ( newYear, newWeek ) =
-                    nextWeek model.currentYear model.currentWeek
-            in
-            ( { model
-                | currentWeek = newWeek
-                , currentYear = newYear
-                , selectedEntries = []
-                , weekEditMode = False
-              }
-            , case model.token of
-                Just token ->
-                    Cmd.batch
-                        [ Api.TimeEntry.fetchWeekDates token newYear newWeek
-                        , Api.TimeEntry.checkWeekHasEntries token newYear newWeek
-                        ]
-
-                Nothing ->
-                    Cmd.none
-            )
-
-        FetchWeekDates ->
-            case model.token of
-                Just token ->
-                    ( model, Api.TimeEntry.fetchWeekDates token model.currentYear model.currentWeek )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        WeekDatesReceived result ->
-            case result of
-                Ok weekDates ->
-                    ( { model | weekDates = Just weekDates }, Cmd.none )
-
-                Err err ->
-                    ( model, Cmd.none )
-
-        CheckWeekHasEntries ->
-            case model.token of
-                Just token ->
-                    ( model, Api.TimeEntry.checkWeekHasEntries token model.currentYear model.currentWeek )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        WeekHasEntriesReceived result ->
-            case result of
-                Ok hasEntries ->
-                    ( { model | hasEntriesForCurrentWeek = hasEntries }, Cmd.none )
-
-                Err err ->
-                    ( model, Cmd.none )
-
-        -- Admin Tabs
-        SwitchTab tab ->
-            let
-                cmd =
-                    case tab of
-                        UsersTab ->
-                            case model.token of
-                                Just token ->
-                                    Api.User.fetchUsers token
-
-                                Nothing ->
-                                    Cmd.none
-
-                        TimeEntriesTab ->
-                            case model.token of
-                                Just token ->
-                                    Cmd.batch
-                                        [ Api.TimeEntry.fetchAllTimeEntries token
-                                        , Api.TimeEntry.fetchYearlyHoursSummary token
-                                        ]
-
-                                Nothing ->
-                                    Cmd.none
-
-                        SchoolYearsTab ->
-                            case model.token of
-                                Just token ->
-                                    Cmd.batch
-                                        [ Api.SchoolYear.fetchSchoolYears token
-                                        , Api.SchoolYear.fetchActiveSchoolYear token
-                                        ]
-
-                                Nothing ->
-                                    Cmd.none
-
-                        _ ->
-                            Cmd.none
-            in
-            ( { model | activeTab = tab, mobileMenuOpen = False }, cmd )
-
-        -- Schedule Form
-        UpdateNewScheduleDay day ->
-            let
-                oldSchedule =
-                    model.newSchedule
-
-                newSchedule =
-                    { oldSchedule | dayOfWeek = day }
-            in
-            ( { model | newSchedule = newSchedule }, Cmd.none )
-
-        UpdateNewScheduleStart time ->
-            let
-                oldSchedule =
-                    model.newSchedule
-
-                newSchedule =
-                    { oldSchedule | startTime = time }
-            in
-            ( { model | newSchedule = newSchedule }, Cmd.none )
-
-        UpdateNewScheduleEnd time ->
-            let
-                oldSchedule =
-                    model.newSchedule
-
-                newSchedule =
-                    { oldSchedule | endTime = time }
-            in
-            ( { model | newSchedule = newSchedule }, Cmd.none )
-
-        UpdateNewScheduleType scheduleType ->
-            let
-                oldSchedule =
-                    model.newSchedule
-
-                newSchedule =
-                    { oldSchedule | scheduleType = scheduleType }
-            in
-            ( { model | newSchedule = newSchedule }, Cmd.none )
-
-        UpdateNewScheduleTitle title ->
-            let
-                oldSchedule =
-                    model.newSchedule
-
-                newSchedule =
-                    { oldSchedule | title = title }
-            in
-            ( { model | newSchedule = newSchedule }, Cmd.none )
-
-        -- Users
-        UpdateNewUsername username ->
-            let
-                oldUser =
-                    model.newUser
-
-                newUser =
-                    { oldUser | username = username }
-            in
-            ( { model | newUser = newUser }, Cmd.none )
-
-        UpdateNewPassword password ->
-            let
-                oldUser =
-                    model.newUser
-
-                newUser =
-                    { oldUser | password = password }
-            in
-            ( { model | newUser = newUser }, Cmd.none )
-
-        UpdateNewUserAdmin isAdmin ->
-            let
-                oldUser =
-                    model.newUser
-
-                newUser =
-                    { oldUser | isAdmin = isAdmin }
-            in
-            ( { model | newUser = newUser }, Cmd.none )
-
-        CreateUser ->
-            User.handleCreateUser model
-
-        UserCreated result ->
-            User.handleUserCreated result model
-
-        DeleteUser userId ->
-            User.handleDeleteUser userId model
-
-        UserDeleted result ->
-            User.handleUserDeleted result model
-
-        FetchUsers ->
-            case model.token of
-                Just token ->
-                    ( model, Api.User.fetchUsers token )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        UsersReceived result ->
-            User.handleUsersReceived result model
-
-        EditUserWorkHours userId ->
-            User.handleEditUserWorkHours userId model
-
-        CancelEditUserWorkHours ->
-            ( { model
-                | editingUserId = Nothing
-                , editingUserWorkHours = ""
-              }
-            , Cmd.none
-            )
-
-        UpdateEditUserWorkHours hours ->
-            ( { model | editingUserWorkHours = hours }, Cmd.none )
-
-        SaveUserWorkHours ->
-            User.handleSaveUserWorkHours model
-
-        UserWorkHoursSaved result ->
-            User.handleUserWorkHoursSaved result model
-
-        ResetUserPassword userId ->
-            User.handleResetUserPassword userId model
-
-        CancelResetPassword ->
-            ( { model
-                | resetPasswordUserId = Nothing
-                , resetPasswordNew = ""
-              }
-            , Cmd.none
-            )
-
-        UpdateResetPasswordNew password ->
-            ( { model | resetPasswordNew = password }, Cmd.none )
-
-        SaveResetPassword ->
-            User.handleSaveResetPassword model
-
-        ResetPasswordSaved result ->
-            User.handleResetPasswordSaved result model
-
-        UpdateUserWorkHours input ->
-            ( { model | userWorkHoursInput = input }, Cmd.none )
-
-        UpdateUserPassword input ->
-            ( { model | userPasswordInput = input }, Cmd.none )
-
-        SaveUserPassword ->
-            case ( model.token, model.selectedUserId ) of
-                ( Just token, Just userId ) ->
-                    if String.length model.userPasswordInput > 0 then
-                        ( model, Api.User.resetUserPassword token userId model.userPasswordInput )
-
-                    else
-                        ( model, Task.perform (\_ -> ShowToast "Passwort erforderlich" WarningToast) (Task.succeed ()) )
-
-                _ ->
-                    ( model, Task.perform (\_ -> ShowToast "Passwort erforderlich" WarningToast) (Task.succeed ()) )
-
-        UserPasswordSaved result ->
-            case result of
-                Ok _ ->
-                    ( { model
-                        | userPasswordInput = ""
-                        , selectedUserId = Nothing
-                        , error = Nothing
-                      }
-                    , Task.perform (\_ -> ShowToast "Passwort erfolgreich zurückgesetzt!" SuccessToast) (Task.succeed ())
-                    )
-
-                Err err ->
-                    ( model, Cmd.none )
-
-        SelectUserForManagement userId ->
-            ( { model | selectedUserId = Just userId, userWorkHoursInput = "", userPasswordInput = "" }, Cmd.none )
-
-        -- Time Entries
-        FetchMyTimeEntries ->
-            case model.token of
-                Just token ->
-                    ( model, Api.TimeEntry.fetchMyTimeEntries token )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        MyTimeEntriesReceived result ->
-            TimeEntry.handleMyTimeEntriesReceived result model
-
-        FetchAllTimeEntries ->
-            case model.token of
-                Just token ->
-                    ( model, Api.TimeEntry.fetchAllTimeEntries token )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        AllTimeEntriesReceived result ->
-            TimeEntry.handleAllTimeEntriesReceived result model
-
-        EditTimeEntry entryId ->
-            TimeEntry.handleEditTimeEntry entryId model
-
-        CancelEditTimeEntry ->
-            ( { model
-                | editingTimeEntryId = Nothing
-                , editingTimeEntry = EditingTimeEntry 0 "" "" "" ""
-              }
-            , Cmd.none
-            )
-
-        UpdateEditTimeEntryDate date ->
-            let
-                old =
-                    model.editingTimeEntry
-
-                new =
-                    { old | date = date }
-            in
-            ( { model | editingTimeEntry = new }, Cmd.none )
-
-        UpdateEditTimeEntryStartTime time ->
-            let
-                old =
-                    model.editingTimeEntry
-
-                new =
-                    { old | startTime = time }
-            in
-            ( { model | editingTimeEntry = new }, Cmd.none )
-
-        UpdateEditTimeEntryEndTime time ->
-            let
-                old =
-                    model.editingTimeEntry
-
-                new =
-                    { old | endTime = time }
-            in
-            ( { model | editingTimeEntry = new }, Cmd.none )
-
-        UpdateEditTimeEntryType entryType ->
-            let
-                old =
-                    model.editingTimeEntry
-
-                new =
-                    { old | entryType = entryType }
-            in
-            ( { model | editingTimeEntry = new }, Cmd.none )
-
-        SaveEditTimeEntry ->
-            TimeEntry.handleSaveEditTimeEntry model
-
-        TimeEntrySaved result ->
-            TimeEntry.handleTimeEntrySaved result model
-
-        TimeEntryDeleted result ->
-            TimeEntry.handleTimeEntryDeleted result model
-
-        ConfirmDeleteTimeEntry entryId ->
-            TimeEntry.handleConfirmDeleteTimeEntry entryId model
-
-        StartEditingTimeEntry entryId entry ->
-            ( { model
-                | editingTimeEntryId = Just entryId
-                , editingTimeEntry = EditingTimeEntry entryId entry.date entry.startTime entry.endTime entry.entryType
-              }
-            , Cmd.none
-            )
-
-        CancelEditingTimeEntry ->
-            ( { model
-                | editingTimeEntryId = Nothing
-                , editingTimeEntry = EditingTimeEntry 0 "" "" "" "lesson"
-              }
-            , Cmd.none
-            )
-
-        UpdateEditingTimeEntryDate date ->
-            let
-                old =
-                    model.editingTimeEntry
-
-                new =
-                    { old | date = date }
-            in
-            ( { model | editingTimeEntry = new }, Cmd.none )
-
-        UpdateEditingTimeEntryStartTime time ->
-            let
-                old =
-                    model.editingTimeEntry
-
-                new =
-                    { old | startTime = time }
-            in
-            ( { model | editingTimeEntry = new }, Cmd.none )
-
-        UpdateEditingTimeEntryEndTime time ->
-            let
-                old =
-                    model.editingTimeEntry
-
-                new =
-                    { old | endTime = time }
-            in
-            ( { model | editingTimeEntry = new }, Cmd.none )
-
-        UpdateEditingTimeEntryType entryType ->
-            let
-                old =
-                    model.editingTimeEntry
-
-                new =
-                    { old | entryType = entryType }
-            in
-            ( { model | editingTimeEntry = new }, Cmd.none )
-
-        SaveEditingTimeEntry ->
-            case ( model.token, model.editingTimeEntryId ) of
-                ( Just token, Just entryId ) ->
-                    ( model, Api.TimeEntry.updateTimeEntry token model.editingTimeEntry )
-
-                _ ->
-                    ( model, Cmd.none )
-
-        -- Weekly Hours
-        FetchWeeklyHours ->
-            case model.token of
-                Just token ->
-                    ( model, Cmd.none )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        WeeklyHoursReceived result ->
-            case result of
-                Ok hours ->
-                    ( { model | weeklyHours = hours }, Cmd.none )
-
-                Err err ->
-                    ( model, Cmd.none )
-
-        MyWeeklySummaryReceived result ->
-            case result of
-                Ok summary ->
-                    ( { model | userWeeklySummary = Just summary }, Cmd.none )
-
-                Err _ ->
-                    ( { model | userWeeklySummary = Nothing }, Cmd.none )
-
-        -- Yearly Hours
-        FetchYearlyHoursSummary ->
-            case model.token of
-                Just token ->
-                    ( model, Api.TimeEntry.fetchYearlyHoursSummary token )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        YearlyHoursSummaryReceived result ->
-            TimeEntry.handleYearlyHoursSummaryReceived result model
-
-        -- Admin Manual Entry
-        SelectUserForManualEntry userId ->
-            let
-                form =
-                    model.adminManualEntryForm
-            in
-            ( { model | adminManualEntryForm = { form | selectedUserId = Just userId } }, Cmd.none )
-
-        UpdateManualEntryDate date ->
-            let
-                form =
-                    model.adminManualEntryForm
-            in
-            ( { model | adminManualEntryForm = { form | date = date } }, Cmd.none )
-
-        UpdateManualEntryHours hours ->
-            let
-                form =
-                    model.adminManualEntryForm
-            in
-            ( { model | adminManualEntryForm = { form | hours = hours } }, Cmd.none )
-
-        UpdateManualEntryType entryType ->
-            let
-                form =
-                    model.adminManualEntryForm
-            in
-            ( { model | adminManualEntryForm = { form | entryType = entryType } }, Cmd.none )
-
-        SaveAdminTimeEntry ->
-            TimeEntry.handleSaveAdminTimeEntry model
-
-        AdminTimeEntrySaved result ->
-            TimeEntry.handleAdminTimeEntrySaved result model
-
-        -- My Info
-        FetchMyInfo ->
-            case model.token of
-                Just token ->
-                    ( model, Api.User.fetchMyInfo token )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        MyInfoReceived result ->
-            case result of
-                Ok user ->
-                    ( { model | users = [ user ] }, Cmd.none )
-
-                Err err ->
-                    ( model, Cmd.none )
-
-        -- School Years
-        FetchSchoolYears ->
-            case model.token of
-                Just token ->
-                    ( model, Api.SchoolYear.fetchSchoolYears token )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        SchoolYearsReceived result ->
-            SchoolYear.handleSchoolYearsReceived result model
-
-        FetchActiveSchoolYear ->
-            case model.token of
-                Just token ->
-                    ( model, Api.SchoolYear.fetchActiveSchoolYear token )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        ActiveSchoolYearReceived result ->
-            SchoolYear.handleActiveSchoolYearReceived result model
-
-        UpdateNewSchoolYearName name ->
-            let
-                old =
-                    model.newSchoolYear
-
-                new =
-                    { old | name = name }
-            in
-            ( { model | newSchoolYear = new }, Cmd.none )
-
-        UpdateNewSchoolYearStart date ->
-            let
-                old =
-                    model.newSchoolYear
-
-                new =
-                    { old | startDate = date }
-            in
-            ( { model | newSchoolYear = new }, Cmd.none )
-
-        UpdateNewSchoolYearEnd date ->
-            let
-                old =
-                    model.newSchoolYear
-
-                new =
-                    { old | endDate = date }
-            in
-            ( { model | newSchoolYear = new }, Cmd.none )
-
-        CreateSchoolYear ->
-            SchoolYear.handleCreateSchoolYear model
-
-        SchoolYearCreated result ->
-            SchoolYear.handleSchoolYearCreated result model
-
-        ActivateSchoolYear id ->
-            SchoolYear.handleActivateSchoolYear id model
-
-        SchoolYearActivated result ->
-            SchoolYear.handleSchoolYearActivated result model
-
-        DeleteSchoolYear id ->
-            SchoolYear.handleDeleteSchoolYear id model
-
-        SchoolYearDeleted result ->
-            SchoolYear.handleSchoolYearDeleted result model
-
-        -- PDF Download
-        DownloadYearlySummaryPDF ->
-            case model.token of
-                Just token ->
-                    ( { model | isProcessing = True }, Api.TimeEntry.downloadYearlySummaryPDF token )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        YearlySummaryPDFReceived result ->
-            case result of
-                Ok pdfBytes ->
-                    let
-                        filename =
-                            "Jahresuebersicht_" ++ String.fromInt model.currentYear ++ ".pdf"
-                    in
-                    ( { model | isProcessing = False }, File.Download.bytes filename "application/pdf" pdfBytes )
-
-                Err err ->
-                    ( { model | isProcessing = False }, Cmd.none )
-
-        -- Delete Confirmation
-        ConfirmDeleteUser userId ->
-            ( { model | pendingDeleteId = Just userId }, Utils.Ports.confirmDelete "Soll dieser Benutzer wirklich gelöscht werden?" )
-
-        DeleteConfirmed confirmed ->
-            if confirmed then
-                case ( model.token, model.pendingDeleteId ) of
-                    ( Just token, Just id ) ->
-                        let
-                            isTimeEntry =
-                                List.any (\e -> e.id == id) model.timeEntries
-                        in
-                        if isTimeEntry then
-                            ( model, Api.TimeEntry.deleteTimeEntry token id )
-
-                        else
-                            ( model, Api.User.deleteUser token id )
-
-                    _ ->
-                        ( model, Cmd.none )
-
-            else
-                ( { model | pendingDeleteId = Nothing }, Cmd.none )
-
-        -- Toasts
-        ShowToast message toastType ->
-            let
-                newToast =
-                    { id = model.nextToastId
-                    , message = message
-                    , toastType = toastType
-                    , dismissible = True
-                    }
-
-                dismissDelay =
-                    case toastType of
-                        ErrorToast ->
-                            8000
-
-                        SuccessToast ->
-                            5000
-
-                        InfoToast ->
-                            5000
-
-                        WarningToast ->
-                            6000
-            in
-            ( { model
-                | toasts = model.toasts ++ [ newToast ]
-                , nextToastId = model.nextToastId + 1
-              }
-            , Task.perform (\_ -> AutoDismissToast newToast.id)
-                (Process.sleep dismissDelay)
-            )
-
-        DismissToast toastId ->
-            ( { model | toasts = List.filter (\t -> t.id /= toastId) model.toasts }
-            , Cmd.none
-            )
-
-        AutoDismissToast toastId ->
-            ( { model | toasts = List.filter (\t -> t.id /= toastId) model.toasts }
-            , Cmd.none
-            )
diff --git a/frontend/src/Update/UserUpdate.elm b/frontend/src/Update/UserUpdate.elm
deleted file mode 100644
index 9fd4b85..0000000
--- a/frontend/src/Update/UserUpdate.elm
+++ /dev/null
@@ -1,196 +0,0 @@
-module Update.UserUpdate exposing
-    ( handleCreateUser
-    , handleDeleteUser
-    , handleEditUserWorkHours
-    , handleResetPasswordSaved
-    , handleResetUserPassword
-    , handleSaveResetPassword
-    , handleSaveUserWorkHours
-    , handleUserCreated
-    , handleUserDeleted
-    , handleUserWorkHoursSaved
-    , handleUsersReceived
-    )
-
-import Api.User
-import Http
-import Task
-import Types.Model exposing (Model, NewUser, ToastType(..), User)
-import Types.Msg exposing (Msg(..))
-
-
-handleCreateUser : Model -> ( Model, Cmd Msg )
-handleCreateUser model =
-    case model.token of
-        Just token ->
-            ( model, Api.User.createUser token model.newUser )
-
-        Nothing ->
-            ( model, Cmd.none )
-
-
-handleUserCreated : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleUserCreated result model =
-    case result of
-        Ok _ ->
-            let
-                emptyUser =
-                    NewUser "" "" False
-            in
-            case model.token of
-                Just token ->
-                    ( { model | newUser = emptyUser }
-                    , Cmd.batch
-                        [ Api.User.fetchUsers token
-                        , Task.perform (\_ -> ShowToast "Benutzer erfolgreich erstellt!" SuccessToast) (Task.succeed ())
-                        ]
-                    )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Err err ->
-            ( model, Cmd.none )
-
-
-handleDeleteUser : Int -> Model -> ( Model, Cmd Msg )
-handleDeleteUser userId model =
-    case model.token of
-        Just token ->
-            ( model, Api.User.deleteUser token userId )
-
-        Nothing ->
-            ( model, Cmd.none )
-
-
-handleUserDeleted : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleUserDeleted result model =
-    case result of
-        Ok _ ->
-            case model.token of
-                Just token ->
-                    ( { model
-                        | pendingDeleteId = Nothing
-                        , error = Nothing
-                        , editingUserId = Nothing
-                        , resetPasswordUserId = Nothing
-                      }
-                    , Cmd.batch
-                        [ Api.User.fetchUsers token
-                        , Task.perform (\_ -> ShowToast "Benutzer erfolgreich gelöscht" SuccessToast) (Task.succeed ())
-                        ]
-                    )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Err err ->
-            ( { model | pendingDeleteId = Nothing }, Cmd.none )
-
-
-handleUsersReceived : Result Http.Error (List User) -> Model -> ( Model, Cmd Msg )
-handleUsersReceived result model =
-    case result of
-        Ok users ->
-            ( { model | users = users }, Cmd.none )
-
-        Err err ->
-            ( model, Cmd.none )
-
-
-handleEditUserWorkHours : Int -> Model -> ( Model, Cmd Msg )
-handleEditUserWorkHours userId model =
-    case List.filter (\u -> u.id == userId) model.users |> List.head of
-        Just user ->
-            ( { model
-                | editingUserId = Just userId
-                , editingUserWorkHours = String.fromFloat user.yearlyWorkHours
-              }
-            , Cmd.none
-            )
-
-        Nothing ->
-            ( model, Cmd.none )
-
-
-handleSaveUserWorkHours : Model -> ( Model, Cmd Msg )
-handleSaveUserWorkHours model =
-    case ( model.token, model.editingUserId, String.toFloat model.editingUserWorkHours ) of
-        ( Just token, Just userId, Just hours ) ->
-            ( model, Api.User.updateUserWorkHours token userId (String.fromFloat hours) )
-
-        _ ->
-            ( model, Task.perform (\_ -> ShowToast "Ungültige Eingabe für Arbeitszeit" WarningToast) (Task.succeed ()) )
-
-
-handleUserWorkHoursSaved : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleUserWorkHoursSaved result model =
-    case result of
-        Ok _ ->
-            case model.token of
-                Just token ->
-                    ( { model
-                        | editingUserWorkHours = ""
-                        , editingUserId = Nothing
-                        , error = Nothing
-                      }
-                    , Cmd.batch
-                        [ Api.User.fetchUsers token
-                        , Task.perform (\_ -> ShowToast "Arbeitszeit erfolgreich gespeichert!" SuccessToast) (Task.succeed ())
-                        ]
-                    )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Err err ->
-            ( model, Cmd.none )
-
-
-handleResetUserPassword : Int -> Model -> ( Model, Cmd Msg )
-handleResetUserPassword userId model =
-    ( { model
-        | resetPasswordUserId = Just userId
-        , resetPasswordNew = ""
-      }
-    , Cmd.none
-    )
-
-
-handleSaveResetPassword : Model -> ( Model, Cmd Msg )
-handleSaveResetPassword model =
-    case model.resetPasswordUserId of
-        Just userId ->
-            case model.token of
-                Just token ->
-                    ( model, Api.User.resetUserPassword token userId model.resetPasswordNew )
-
-                Nothing ->
-                    ( model, Cmd.none )
-
-        Nothing ->
-            ( model, Cmd.none )
-
-
-handleResetPasswordSaved : Result Http.Error () -> Model -> ( Model, Cmd Msg )
-handleResetPasswordSaved result model =
-    case result of
-        Ok _ ->
-            ( { model
-                | resetPasswordUserId = Nothing
-                , resetPasswordNew = ""
-                , error = Nothing
-              }
-            , Cmd.batch
-                [ case model.token of
-                    Just token ->
-                        Api.User.fetchUsers token
-
-                    Nothing ->
-                        Cmd.none
-                , Task.perform (\_ -> ShowToast "Passwort erfolgreich zurückgesetzt" SuccessToast) (Task.succeed ())
-                ]
-            )
-
-        Err err ->
-            ( model, Cmd.none )
diff --git a/frontend/src/Utils/DateUtils.elm b/frontend/src/Utils/DateUtils.elm
deleted file mode 100644
index 1ea98dd..0000000
--- a/frontend/src/Utils/DateUtils.elm
+++ /dev/null
@@ -1,338 +0,0 @@
-module Utils.DateUtils exposing
-    ( addDaysToDate
-    , getDateForWeekDay
-    , getDayOfWeek
-    , getDayOfYear
-    , getISOWeek
-    , getISOWeekFromPosix
-    , getWeekDateRange
-    , getYearWeekFromDate
-    , isLeapYear
-    , monthToInt
-    , nextWeek
-    , previousWeek
-    )
-
-import Time
-
-
-getISOWeekFromPosix : Time.Posix -> ( Int, Int )
-getISOWeekFromPosix time =
-    let
-        year =
-            Time.toYear Time.utc time
-
-        month =
-            Time.toMonth Time.utc time |> monthToInt
-
-        day =
-            Time.toDay Time.utc time
-    in
-    ( year, getISOWeek year month day )
-
-
-monthToInt : Time.Month -> Int
-monthToInt month =
-    case month of
-        Time.Jan ->
-            1
-
-        Time.Feb ->
-            2
-
-        Time.Mar ->
-            3
-
-        Time.Apr ->
-            4
-
-        Time.May ->
-            5
-
-        Time.Jun ->
-            6
-
-        Time.Jul ->
-            7
-
-        Time.Aug ->
-            8
-
-        Time.Sep ->
-            9
-
-        Time.Oct ->
-            10
-
-        Time.Nov ->
-            11
-
-        Time.Dec ->
-            12
-
-
-getISOWeek : Int -> Int -> Int -> Int
-getISOWeek year month day =
-    let
-        dayOfYear =
-            getDayOfYear year month day
-
-        jan4DayOfWeek =
-            getDayOfWeek year 1 4
-
-        mondayOfWeek1DayOfYear =
-            4 - jan4DayOfWeek
-
-        weekNum =
-            ((dayOfYear - mondayOfWeek1DayOfYear) // 7) + 1
-    in
-    if weekNum < 1 then
-        52
-
-    else if weekNum > 52 then
-        let
-            dec31DayOfWeek =
-                getDayOfWeek year 12 31
-
-            jan1DayOfWeek =
-                getDayOfWeek year 1 1
-        in
-        if jan1DayOfWeek == 3 || (isLeapYear year && jan1DayOfWeek == 2) then
-            weekNum
-
-        else
-            1
-
-    else
-        weekNum
-
-
-getDayOfYear : Int -> Int -> Int -> Int
-getDayOfYear year month day =
-    let
-        daysInMonth =
-            [ 31
-            , if isLeapYear year then
-                29
-
-              else
-                28
-            , 31
-            , 30
-            , 31
-            , 30
-            , 31
-            , 31
-            , 30
-            , 31
-            , 30
-            , 31
-            ]
-
-        daysBefore =
-            List.take (month - 1) daysInMonth |> List.sum
-    in
-    daysBefore + day
-
-
-isLeapYear : Int -> Bool
-isLeapYear year =
-    (modBy 4 year == 0) && ((modBy 100 year /= 0) || (modBy 400 year == 0))
-
-
-getDayOfWeek : Int -> Int -> Int -> Int
-getDayOfWeek year month day =
-    let
-        adjustedMonth =
-            if month < 3 then
-                month + 12
-
-            else
-                month
-
-        adjustedYear =
-            if month < 3 then
-                year - 1
-
-            else
-                year
-
-        q =
-            day
-
-        m =
-            adjustedMonth
-
-        k =
-            modBy 100 adjustedYear
-
-        j =
-            adjustedYear // 100
-
-        h =
-            (q + ((13 * (m + 1)) // 5) + k + (k // 4) + (j // 4) - (2 * j)) |> modBy 7
-    in
-    (h + 5) |> modBy 7
-
-
-getDateForWeekDay : Int -> Int -> Int -> String
-getDateForWeekDay year week dayOfWeek =
-    let
-        jan4DayOfWeek =
-            getDayOfWeek year 1 4
-
-        mondayOfWeek1Date =
-            4 - jan4DayOfWeek
-
-        targetDayOfYear =
-            mondayOfWeek1Date + ((week - 1) * 7) + dayOfWeek
-
-        ( finalYear, finalMonth, finalDay ) =
-            if targetDayOfYear < 1 then
-                addDaysToDate (year - 1) 12 31 targetDayOfYear
-
-            else
-                addDaysToDate year 1 targetDayOfYear 0
-    in
-    String.fromInt finalYear
-        ++ "-"
-        ++ String.padLeft 2 '0' (String.fromInt finalMonth)
-        ++ "-"
-        ++ String.padLeft 2 '0' (String.fromInt finalDay)
-
-
-addDaysToDate : Int -> Int -> Int -> Int -> ( Int, Int, Int )
-addDaysToDate startYear startMonth startDay daysToAdd =
-    let
-        daysInMonth m y =
-            case m of
-                1 ->
-                    31
-
-                2 ->
-                    if isLeapYear y then
-                        29
-
-                    else
-                        28
-
-                3 ->
-                    31
-
-                4 ->
-                    30
-
-                5 ->
-                    31
-
-                6 ->
-                    30
-
-                7 ->
-                    31
-
-                8 ->
-                    31
-
-                9 ->
-                    30
-
-                10 ->
-                    31
-
-                11 ->
-                    30
-
-                12 ->
-                    31
-
-                _ ->
-                    0
-
-        helper y m d remaining =
-            if remaining == 0 then
-                ( y, m, d )
-
-            else if remaining > 0 then
-                let
-                    daysInCurrentMonth =
-                        daysInMonth m y
-
-                    daysLeftInMonth =
-                        daysInCurrentMonth - d
-                in
-                if remaining <= daysLeftInMonth then
-                    ( y, m, d + remaining )
-
-                else if m == 12 then
-                    helper (y + 1) 1 1 (remaining - daysLeftInMonth - 1)
-
-                else
-                    helper y (m + 1) 1 (remaining - daysLeftInMonth - 1)
-
-            else if d + remaining >= 1 then
-                ( y, m, d + remaining )
-
-            else if m == 1 then
-                let
-                    prevMonthDays =
-                        daysInMonth 12 (y - 1)
-                in
-                helper (y - 1) 12 prevMonthDays (remaining + d)
-
-            else
-                let
-                    prevMonthDays =
-                        daysInMonth (m - 1) y
-                in
-                helper y (m - 1) prevMonthDays (remaining + d)
-    in
-    helper startYear startMonth startDay daysToAdd
-
-
-previousWeek : Int -> Int -> ( Int, Int )
-previousWeek year week =
-    if week == 1 then
-        ( year - 1, 52 )
-
-    else
-        ( year, week - 1 )
-
-
-nextWeek : Int -> Int -> ( Int, Int )
-nextWeek year week =
-    if week >= 52 then
-        ( year + 1, 1 )
-
-    else
-        ( year, week + 1 )
-
-
-getWeekDateRange : Int -> Int -> String
-getWeekDateRange year week =
-    let
-        mondayDate =
-            getDateForWeekDay year week 0
-
-        fridayDate =
-            getDateForWeekDay year week 4
-    in
-    mondayDate ++ " bis " ++ fridayDate
-
-
-getYearWeekFromDate : String -> ( Int, Int )
-getYearWeekFromDate dateStr =
-    let
-        parts =
-            String.split "-" dateStr
-
-        year =
-            parts |> List.head |> Maybe.andThen String.toInt |> Maybe.withDefault 2025
-
-        month =
-            parts |> List.drop 1 |> List.head |> Maybe.andThen String.toInt |> Maybe.withDefault 1
-
-        day =
-            parts |> List.drop 2 |> List.head |> Maybe.andThen String.toInt |> Maybe.withDefault 1
-    in
-    ( year, getISOWeek year month day )
diff --git a/frontend/src/Utils/ErrorHandler.elm b/frontend/src/Utils/ErrorHandler.elm
deleted file mode 100644
index a9746e2..0000000
--- a/frontend/src/Utils/ErrorHandler.elm
+++ /dev/null
@@ -1,42 +0,0 @@
-module Utils.ErrorHandler exposing (handleApiError)
-
-import Api.Decoders exposing (apiErrorDecoder)
-import Http
-import Json.Decode as Decode
-import Task
-import Types.Model exposing (ToastType(..))
-import Types.Msg exposing (Msg(..))
-
-
-handleApiError : Http.Error -> Cmd Msg
-handleApiError error =
-    let
-        message =
-            case error of
-                Http.BadBody body ->
-                    case Decode.decodeString apiErrorDecoder body of
-                        Ok apiErr ->
-                            apiErr.message
-
-                        Err _ ->
-                            "Ein Fehler ist aufgetreten"
-
-                Http.BadStatus 401 ->
-                    "Keine Berechtigung - bitte erneut anmelden"
-
-                Http.BadStatus 403 ->
-                    "Zugriff verweigert"
-
-                Http.BadStatus 404 ->
-                    "Ressource nicht gefunden"
-
-                Http.Timeout ->
-                    "Zeitüberschreitung - bitte erneut versuchen"
-
-                Http.NetworkError ->
-                    "Netzwerkfehler - bitte Verbindung prüfen"
-
-                _ ->
-                    "Ein unerwarteter Fehler ist aufgetreten"
-    in
-    Task.perform (\_ -> ShowToast message ErrorToast) (Task.succeed ())
diff --git a/frontend/src/Utils/Ports.elm b/frontend/src/Utils/Ports.elm
deleted file mode 100644
index f5b8dc2..0000000
--- a/frontend/src/Utils/Ports.elm
+++ /dev/null
@@ -1,20 +0,0 @@
-port module Utils.Ports exposing
-    ( confirmDelete
-    , confirmDeleteResponse
-    , removeToken
-    , saveToken
-    )
-
-import Json.Encode as Encode
-
-
-port saveToken : Encode.Value -> Cmd msg
-
-
-port removeToken : () -> Cmd msg
-
-
-port confirmDelete : String -> Cmd msg
-
-
-port confirmDeleteResponse : (Bool -> msg) -> Sub msg
diff --git a/frontend/src/Utils/TimeUtils.elm b/frontend/src/Utils/TimeUtils.elm
deleted file mode 100644
index 2d74958..0000000
--- a/frontend/src/Utils/TimeUtils.elm
+++ /dev/null
@@ -1,34 +0,0 @@
-module Utils.TimeUtils exposing (calculateHours)
-
-
-calculateHours : String -> String -> Float
-calculateHours startTime endTime =
-    let
-        parseTime timeStr =
-            case String.split ":" timeStr of
-                [ h, m ] ->
-                    (String.toFloat h |> Maybe.withDefault 0)
-                        + ((String.toFloat m |> Maybe.withDefault 0) / 60)
-
-                _ ->
-                    0
-
-        start =
-            parseTime startTime
-
-        end =
-            parseTime endTime
-    in
-    if end > start then
-        end - start
-
-    else if endTime == "manual" then
-        case String.toFloat startTime of
-            Just time ->
-                time
-
-            Nothing ->
-                0
-
-    else
-        0
diff --git a/frontend/src/View/AdminDashboard.elm b/frontend/src/View/AdminDashboard.elm
deleted file mode 100644
index 9afcfb5..0000000
--- a/frontend/src/View/AdminDashboard.elm
+++ /dev/null
@@ -1,1165 +0,0 @@
-module View.AdminDashboard exposing (viewAdminDashboard)
-
-import Html exposing (..)
-import Html.Attributes exposing (..)
-import Html.Events exposing (..)
-import Types.Model exposing (Model, Schedule, SchoolYear, TimeEntry, User, WeeklyHours, YearlyHoursSummary)
-import Types.Msg exposing (Msg(..))
-import Types.Page exposing (AdminTab(..))
-import Utils.DateUtils exposing (getYearWeekFromDate)
-import Utils.TimeUtils exposing (calculateHours)
-import View.Components.Navigation exposing (viewDayMobile, viewWeekNavigation)
-import View.Components.Schedule exposing (viewScheduleItemWithDay)
-
-
-viewAdminDashboard : Model -> Html Msg
-viewAdminDashboard model =
-    div []
-        [ nav [ class "navbar is-danger" ]
-            [ div [ class "navbar-brand" ]
-                [ div [ class "navbar-item" ]
-                    [ h1 [ class "title is-4 has-text-white" ] [ text "Admin Dashboard" ]
-                    ]
-                , a
-                    [ class
-                        ("navbar-burger"
-                            ++ (if model.mobileMenuOpen then
-                                    " is-active"
-
-                                else
-                                    ""
-                               )
-                        )
-                    , attribute "aria-label" "menu"
-                    , attribute "aria-expanded"
-                        (if model.mobileMenuOpen then
-                            "true"
-
-                         else
-                            "false"
-                        )
-                    , onClick ToggleMobileMenu
-                    ]
-                    [ span [ attribute "aria-hidden" "true" ] []
-                    , span [ attribute "aria-hidden" "true" ] []
-                    , span [ attribute "aria-hidden" "true" ] []
-                    ]
-                ]
-            , div
-                [ id "navbarAdmin"
-                , class
-                    ("navbar-menu"
-                        ++ (if model.mobileMenuOpen then
-                                " is-active"
-
-                            else
-                                ""
-                           )
-                    )
-                ]
-                [ div [ class "navbar-end" ]
-                    [ div [ class "navbar-item" ]
-                        [ span [ class "has-text-white mr-2" ] [ text model.username ]
-                        ]
-                    , div [ class "navbar-item" ]
-                        [ button [ class "button is-light", onClick Logout ]
-                            [ span [ class "icon" ]
-                                [ i [ class "fas fa-sign-out-alt" ] [] ]
-                            , span [] [ text "Abmelden" ]
-                            ]
-                        ]
-                    ]
-                ]
-            ]
-        , section [ class "section" ]
-            [ div [ class "container" ]
-                [ div [ class "tabs is-boxed" ]
-                    [ ul []
-                        [ li [ classList [ ( "is-active", model.activeTab == ScheduleTab ) ] ]
-                            [ a [ onClick (SwitchTab ScheduleTab) ] [ text "Stundenplan" ] ]
-                        , li [ classList [ ( "is-active", model.activeTab == UsersTab ) ] ]
-                            [ a [ onClick (SwitchTab UsersTab) ] [ text "Benutzer" ] ]
-                        , li [ classList [ ( "is-active", model.activeTab == TimeEntriesTab ) ] ]
-                            [ a [ onClick (SwitchTab TimeEntriesTab) ] [ text "Zeiteinträge" ] ]
-                        , li [ classList [ ( "is-active", model.activeTab == SchoolYearsTab ) ] ]
-                            [ a [ onClick (SwitchTab SchoolYearsTab) ] [ text "Schuljahre" ] ]
-                        ]
-                    ]
-                , case model.activeTab of
-                    ScheduleTab ->
-                        viewScheduleTab model
-
-                    UsersTab ->
-                        viewUsersTab model
-
-                    TimeEntriesTab ->
-                        viewTimeEntriesTab model
-
-                    SchoolYearsTab ->
-                        viewSchoolYearsTab model
-                ]
-            ]
-        ]
-
-
-viewScheduleTab : Model -> Html Msg
-viewScheduleTab model =
-    div []
-        [ h2 [ class "title" ] [ text "Stundenplan verwalten" ]
-        , viewScheduleForm model
-        , viewScheduleList model
-        ]
-
-
-viewUsersTab : Model -> Html Msg
-viewUsersTab model =
-    div []
-        [ h2 [ class "title" ] [ text "Benutzer verwalten" ]
-        , viewUserForm model
-        , viewUserList model
-        ]
-
-
-viewTimeEntriesTab : Model -> Html Msg
-viewTimeEntriesTab model =
-    div []
-        [ h2 [ class "title" ] [ text "Jahresübersicht" ]
-        , viewYearlyHoursSummary model
-        , h2 [ class "title mt-6" ] [ text "Manuelle Stundeneintragung" ]
-        , viewAdminManualEntryForm model
-        , h2 [ class "title mt-6" ] [ text "Alle Zeiteinträge" ]
-        , case model.editingTimeEntryId of
-            Just _ ->
-                viewTimeEntriesEditForm model
-
-            Nothing ->
-                viewTimeEntriesListWithEdit model
-        ]
-
-
-viewSchoolYearsTab : Model -> Html Msg
-viewSchoolYearsTab model =
-    div []
-        [ h2 [ class "title" ] [ text "Schuljahre verwalten" ]
-        , case model.activeSchoolYear of
-            Just schoolYear ->
-                div [ class "notification is-info is-light mb-4" ]
-                    [ p [ class "has-text-weight-bold" ]
-                        [ text ("Aktives Schuljahr: " ++ schoolYear.name) ]
-                    , p [ class "is-size-7" ]
-                        [ text (schoolYear.startDate ++ " bis " ++ schoolYear.endDate) ]
-                    ]
-
-            Nothing ->
-                div [ class "notification is-warning is-light mb-4" ]
-                    [ text "⚠️  Kein Schuljahr aktiv! Bitte eines aktivieren." ]
-        , viewSchoolYearForm model
-        , viewSchoolYearsList model
-        ]
-
-
-viewSchoolYearForm : Model -> Html Msg
-viewSchoolYearForm model =
-    div [ class "box" ]
-        [ h3 [ class "subtitle" ] [ text "Neues Schuljahr erstellen" ]
-        , div [ class "columns" ]
-            [ div [ class "column is-4" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Name (z.B. 2024/2025)" ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input"
-                            , type_ "text"
-                            , placeholder "2024/2025"
-                            , value model.newSchoolYear.name
-                            , onInput UpdateNewSchoolYearName
-                            , disabled model.isProcessing
-                            ]
-                            []
-                        ]
-                    ]
-                ]
-            , div [ class "column is-4" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Startdatum" ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input"
-                            , type_ "date"
-                            , value model.newSchoolYear.startDate
-                            , onInput UpdateNewSchoolYearStart
-                            , disabled model.isProcessing
-                            ]
-                            []
-                        ]
-                    ]
-                ]
-            , div [ class "column is-4" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Enddatum" ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input"
-                            , type_ "date"
-                            , value model.newSchoolYear.endDate
-                            , onInput UpdateNewSchoolYearEnd
-                            , disabled model.isProcessing
-                            ]
-                            []
-                        ]
-                    ]
-                ]
-            ]
-        , div [ class "field" ]
-            [ div [ class "control" ]
-                [ button
-                    [ class "button is-primary"
-                    , onClick CreateSchoolYear
-                    , disabled
-                        (String.isEmpty model.newSchoolYear.name
-                            || String.isEmpty model.newSchoolYear.startDate
-                            || String.isEmpty model.newSchoolYear.endDate
-                            || model.isProcessing
-                        )
-                    ]
-                    [ if model.isProcessing then
-                        span [ class "icon" ] [ i [ class "fas fa-spinner fa-pulse" ] [] ]
-
-                      else
-                        text ""
-                    , text " Schuljahr erstellen"
-                    ]
-                ]
-            ]
-        ]
-
-
-viewSchoolYearsList : Model -> Html Msg
-viewSchoolYearsList model =
-    div [ class "box mt-4" ]
-        [ h3 [ class "subtitle" ] [ text "Vorhandene Schuljahre" ]
-        , if List.isEmpty model.schoolYears then
-            p [ class "has-text-centered has-text-grey" ] [ text "Keine Schuljahre vorhanden" ]
-
-          else
-            table [ class "table is-fullwidth is-striped is-hoverable" ]
-                [ thead []
-                    [ tr []
-                        [ th [] [ text "Name" ]
-                        , th [] [ text "Startdatum" ]
-                        , th [] [ text "Enddatum" ]
-                        , th [ class "has-text-centered" ] [ text "Status" ]
-                        , th [ class "has-text-centered" ] [ text "Aktionen" ]
-                        ]
-                    ]
-                , tbody []
-                    (List.map viewSchoolYearRow model.schoolYears)
-                ]
-        ]
-
-
-viewSchoolYearRow : SchoolYear -> Html Msg
-viewSchoolYearRow schoolYear =
-    tr []
-        [ td [] [ text schoolYear.name ]
-        , td [] [ text schoolYear.startDate ]
-        , td [] [ text schoolYear.endDate ]
-        , td [ class "has-text-centered" ]
-            [ if schoolYear.isActive then
-                span [ class "tag is-success" ] [ text "Aktiv" ]
-
-              else
-                span [ class "tag is-light" ] [ text "Inaktiv" ]
-            ]
-        , td [ class "has-text-centered" ]
-            [ if not schoolYear.isActive then
-                button
-                    [ class "button is-small is-info mr-2"
-                    , onClick (ActivateSchoolYear schoolYear.id)
-                    ]
-                    [ text "Aktivieren" ]
-
-              else
-                text ""
-            , button
-                [ class "button is-small is-danger"
-                , onClick (DeleteSchoolYear schoolYear.id)
-                ]
-                [ text "Löschen" ]
-            ]
-        ]
-
-
-viewScheduleList : Model -> Html Msg
-viewScheduleList model =
-    div [ class "box" ]
-        [ h3 [ class "subtitle" ] [ text "Aktueller Stundenplan" ]
-        , table [ class "table is-fullwidth is-striped" ]
-            [ thead []
-                [ tr []
-                    [ th [] [ text "Tag" ]
-                    , th [] [ text "Zeit" ]
-                    , th [] [ text "Typ" ]
-                    , th [] [ text "Titel" ]
-                    , th [] [ text "Aktion" ]
-                    ]
-                ]
-            , tbody []
-                (List.map viewScheduleRow model.schedules)
-            ]
-        ]
-
-
-viewScheduleForm : Model -> Html Msg
-viewScheduleForm model =
-    div [ class "box" ]
-        [ div [ class "columns" ]
-            [ div [ class "column" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Wochentag" ]
-                    , div [ class "control" ]
-                        [ div [ class "select is-fullwidth" ]
-                            [ select
-                                [ onInput UpdateNewScheduleDay
-                                , disabled model.isProcessing
-                                , value model.newSchedule.dayOfWeek
-                                ]
-                                [ option [ value "" ] [ text "Wochentag wählen" ]
-                                , option [ value "0" ] [ text "Montag" ]
-                                , option [ value "1" ] [ text "Dienstag" ]
-                                , option [ value "2" ] [ text "Mittwoch" ]
-                                , option [ value "3" ] [ text "Donnerstag" ]
-                                , option [ value "4" ] [ text "Freitag" ]
-                                ]
-                            ]
-                        ]
-                    ]
-                ]
-            , div [ class "column" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Startzeit" ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input"
-                            , type_ "time"
-                            , value model.newSchedule.startTime
-                            , onInput UpdateNewScheduleStart
-                            , disabled model.isProcessing
-                            ]
-                            []
-                        ]
-                    ]
-                ]
-            , div [ class "column" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Endzeit" ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input"
-                            , type_ "time"
-                            , value model.newSchedule.endTime
-                            , onInput UpdateNewScheduleEnd
-                            , disabled model.isProcessing
-                            ]
-                            []
-                        ]
-                    ]
-                ]
-            ]
-        , div [ class "columns" ]
-            [ div [ class "column" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Typ" ]
-                    , div [ class "control" ]
-                        [ div [ class "select is-fullwidth" ]
-                            [ select
-                                [ onInput UpdateNewScheduleType
-                                , value model.newSchedule.scheduleType
-                                , disabled model.isProcessing
-                                ]
-                                [ option [ value "lesson" ] [ text "Unterricht" ]
-                                , option [ value "break" ] [ text "Pause" ]
-                                ]
-                            ]
-                        ]
-                    ]
-                ]
-            , div [ class "column" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Titel" ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input"
-                            , type_ "text"
-                            , placeholder "z.B. Mathematik"
-                            , value model.newSchedule.title
-                            , onInput UpdateNewScheduleTitle
-                            , disabled model.isProcessing
-                            ]
-                            []
-                        ]
-                    ]
-                ]
-            ]
-        , div [ class "field" ]
-            [ div [ class "control" ]
-                [ button
-                    [ class "button is-primary"
-                    , onClick CreateSchedule
-                    , disabled (String.isEmpty model.newSchedule.dayOfWeek || model.isProcessing)
-                    ]
-                    [ if model.isProcessing then
-                        span [ class "icon" ] [ i [ class "fas fa-spinner fa-pulse" ] [] ]
-
-                      else
-                        text ""
-                    , text " Hinzufügen"
-                    ]
-                ]
-            ]
-        , if String.isEmpty model.newSchedule.dayOfWeek then
-            div [ class "help is-warning" ] [ text "Bitte alle Felder ausfüllen" ]
-
-          else
-            text ""
-        ]
-
-
-viewScheduleRow : Schedule -> Html Msg
-viewScheduleRow schedule =
-    let
-        dayName =
-            case schedule.dayOfWeek of
-                0 ->
-                    "Montag"
-
-                1 ->
-                    "Dienstag"
-
-                2 ->
-                    "Mittwoch"
-
-                3 ->
-                    "Donnerstag"
-
-                4 ->
-                    "Freitag"
-
-                _ ->
-                    "Unbekannt"
-
-        typeName =
-            if schedule.scheduleType == "break" then
-                "Pause"
-
-            else
-                "Unterricht"
-    in
-    tr []
-        [ td [] [ text dayName ]
-        , td [] [ text (schedule.startTime ++ " - " ++ schedule.endTime) ]
-        , td [] [ text typeName ]
-        , td [] [ text schedule.title ]
-        , td []
-            [ button
-                [ class "button is-small is-danger"
-                , onClick (DeleteSchedule schedule.id)
-                ]
-                [ text "Löschen" ]
-            ]
-        ]
-
-
-viewUserForm : Model -> Html Msg
-viewUserForm model =
-    div [ class "box" ]
-        [ div [ class "columns" ]
-            [ div [ class "column" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Benutzername" ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input"
-                            , type_ "text"
-                            , placeholder "Benutzername"
-                            , value model.newUser.username
-                            , onInput UpdateNewUsername
-                            ]
-                            []
-                        ]
-                    ]
-                ]
-            , div [ class "column" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Passwort" ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input"
-                            , type_ "password"
-                            , placeholder "Passwort"
-                            , value model.newUser.password
-                            , onInput UpdateNewPassword
-                            ]
-                            []
-                        ]
-                    ]
-                ]
-            , div [ class "column is-narrow" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Admin" ]
-                    , div [ class "control" ]
-                        [ label [ class "checkbox" ]
-                            [ input
-                                [ type_ "checkbox"
-                                , checked model.newUser.isAdmin
-                                , onCheck UpdateNewUserAdmin
-                                ]
-                                []
-                            , text " Admin-Rechte"
-                            ]
-                        ]
-                    ]
-                ]
-            ]
-        , div [ class "field" ]
-            [ div [ class "control" ]
-                [ button [ class "button is-primary", onClick CreateUser ] [ text "Benutzer anlegen" ]
-                ]
-            ]
-        ]
-
-
-viewUserList : Model -> Html Msg
-viewUserList model =
-    div [ class "box" ]
-        [ h3 [ class "subtitle" ] [ text "Benutzer" ]
-        , if List.isEmpty model.users then
-            p [ class "has-text-centered" ] [ text "Keine Benutzer vorhanden" ]
-
-          else
-            table [ class "table is-fullwidth is-striped is-hoverable" ]
-                [ thead []
-                    [ tr []
-                        [ th [] [ text "ID" ]
-                        , th [] [ text "Benutzername" ]
-                        , th [] [ text "Rolle" ]
-                        , th [ class "has-text-right" ] [ text "Arbeitszeit/Jahr" ]
-                        , th [ class "has-text-centered" ] [ text "Aktionen" ]
-                        ]
-                    ]
-                , tbody []
-                    (List.map (viewUserRowWithActions model) model.users)
-                ]
-        ]
-
-
-viewUserRowWithActions : Model -> User -> Html Msg
-viewUserRowWithActions model user =
-    if model.editingUserId == Just user.id then
-        tr []
-            [ td [] [ text (String.fromInt user.id) ]
-            , td [] [ text user.username ]
-            , td []
-                [ text
-                    (if user.isAdmin then
-                        "Admin"
-
-                     else
-                        "Benutzer"
-                    )
-                ]
-            , td []
-                [ input
-                    [ class "input is-small"
-                    , type_ "number"
-                    , step "0.5"
-                    , value model.editingUserWorkHours
-                    , onInput UpdateEditUserWorkHours
-                    ]
-                    []
-                ]
-            , td [ class "has-text-centered" ]
-                [ button [ class "button is-small is-success mr-2", onClick SaveUserWorkHours ] [ text "✓" ]
-                , button [ class "button is-small is-light", onClick CancelEditUserWorkHours ] [ text "✕" ]
-                ]
-            ]
-
-    else if model.resetPasswordUserId == Just user.id then
-        tr []
-            [ td [] [ text (String.fromInt user.id) ]
-            , td [] [ text user.username ]
-            , td []
-                [ text
-                    (if user.isAdmin then
-                        "Admin"
-
-                     else
-                        "Benutzer"
-                    )
-                ]
-            , td []
-                [ input
-                    [ class "input is-small"
-                    , type_ "password"
-                    , placeholder "Neues Passwort"
-                    , value model.resetPasswordNew
-                    , onInput UpdateResetPasswordNew
-                    ]
-                    []
-                ]
-            , td [ class "has-text-centered" ]
-                [ button [ class "button is-small is-success mr-2", onClick SaveResetPassword ] [ text "✓" ]
-                , button [ class "button is-small is-light", onClick CancelResetPassword ] [ text "✕" ]
-                ]
-            ]
-
-    else
-        tr []
-            [ td [] [ text (String.fromInt user.id) ]
-            , td [] [ text user.username ]
-            , td []
-                [ text
-                    (if user.isAdmin then
-                        "Admin"
-
-                     else
-                        "Benutzer"
-                    )
-                ]
-            , td [ class "has-text-right" ] [ text (String.fromFloat user.yearlyWorkHours ++ " Std.") ]
-            , td [ class "has-text-centered" ]
-                [ if user.id == 1 then
-                    span [ class "tag is-light" ] [ text "Geschützt" ]
-
-                  else
-                    div []
-                        [ button
-                            [ class "button is-small is-info mr-2"
-                            , onClick (EditUserWorkHours user.id)
-                            ]
-                            [ text "Arbeitszeit" ]
-                        , button
-                            [ class "button is-small is-warning mr-2"
-                            , onClick (ResetUserPassword user.id)
-                            ]
-                            [ text "PW Reset" ]
-                        , button
-                            [ class "button is-small is-danger"
-                            , onClick (DeleteUser user.id)
-                            ]
-                            [ text "Löschen" ]
-                        ]
-                ]
-            ]
-
-
-viewUserRow : User -> Html Msg
-viewUserRow user =
-    tr []
-        [ td [] [ text (String.fromInt user.id) ]
-        , td [] [ text user.username ]
-        , td []
-            [ text
-                (if user.isAdmin then
-                    "Admin"
-
-                 else
-                    "Benutzer"
-                )
-            ]
-        , td []
-            [ if user.id == 1 then
-                span [ class "tag is-light" ] [ text "Geschützt" ]
-
-              else
-                button
-                    [ class "button is-small is-danger"
-                    , onClick (DeleteUser user.id)
-                    ]
-                    [ text "Löschen" ]
-            ]
-        ]
-
-
-viewTimeEntriesList : Model -> Html Msg
-viewTimeEntriesList model =
-    let
-        filteredEntries =
-            List.filter
-                (\e ->
-                    let
-                        ( entryYear, entryWeek ) =
-                            getYearWeekFromDate e.date
-                    in
-                    entryWeek == model.currentWeek && entryYear == model.currentYear
-                )
-                model.timeEntries
-    in
-    div [ class "box" ]
-        [ if List.isEmpty filteredEntries then
-            p [ class "has-text-centered" ] [ text "Keine Einträge für diese Woche" ]
-
-          else
-            table [ class "table is-fullwidth is-striped" ]
-                [ thead []
-                    [ tr []
-                        [ th [] [ text "Mitarbeiter" ]
-                        , th [] [ text "Datum" ]
-                        , th [] [ text "Zeit" ]
-                        , th [] [ text "Typ" ]
-                        , th [ class "has-text-right" ] [ text "Stunden" ]
-                        ]
-                    ]
-                , tbody []
-                    (List.map (viewTimeEntryRowWithActions model) filteredEntries)
-                ]
-        ]
-
-
-viewTimeEntryRowWithActions : Model -> TimeEntry -> Html Msg
-viewTimeEntryRowWithActions model entry =
-    let
-        hours =
-            if entry.entryType == "lesson" then
-                1.0
-
-            else
-                calculateHours entry.startTime entry.endTime
-    in
-    tr []
-        [ td [] [ text entry.username ]
-        , td [] [ text entry.date ]
-        , td [] [ text (entry.startTime ++ " - " ++ entry.endTime) ]
-        , td [] [ text entry.entryType ]
-        , td [ class "has-text-right" ] [ text (String.fromFloat hours ++ " Std.") ]
-        , td []
-            [ div [ class "buttons are-small" ]
-                [ button
-                    [ class "button is-info is-small"
-                    , onClick (StartEditingTimeEntry entry.id entry)
-                    ]
-                    [ text "Bearbeiten" ]
-                , button
-                    [ class "button is-danger is-small"
-                    , onClick (ConfirmDeleteTimeEntry entry.id)
-                    ]
-                    [ text "Löschen" ]
-                ]
-            ]
-        ]
-
-
-viewTimeEntriesEditForm : Model -> Html Msg
-viewTimeEntriesEditForm model =
-    div [ class "box has-background-warning-light" ]
-        [ h3 [ class "subtitle" ] [ text "Zeiteintrag bearbeiten" ]
-        , div [ class "columns" ]
-            [ div [ class "column" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Datum" ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input"
-                            , type_ "date"
-                            , value model.editingTimeEntry.date
-                            , onInput UpdateEditTimeEntryDate
-                            ]
-                            []
-                        ]
-                    ]
-                ]
-            , div [ class "column" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Startzeit" ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input"
-                            , type_ "time"
-                            , value model.editingTimeEntry.startTime
-                            , onInput UpdateEditTimeEntryStartTime
-                            ]
-                            []
-                        ]
-                    ]
-                ]
-            , div [ class "column" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Endzeit" ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input"
-                            , type_ "time"
-                            , value model.editingTimeEntry.endTime
-                            , onInput UpdateEditTimeEntryEndTime
-                            ]
-                            []
-                        ]
-                    ]
-                ]
-            , div [ class "column" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Typ" ]
-                    , div [ class "control" ]
-                        [ div [ class "select is-fullwidth" ]
-                            [ select [ onInput UpdateEditTimeEntryType, value model.editingTimeEntry.entryType ]
-                                [ option [ value "lesson" ] [ text "Unterricht" ]
-                                , option [ value "break" ] [ text "Pause" ]
-                                ]
-                            ]
-                        ]
-                    ]
-                ]
-            ]
-        , div [ class "field is-grouped mt-4" ]
-            [ div [ class "control" ]
-                [ button
-                    [ class "button is-success"
-                    , onClick SaveEditTimeEntry
-                    ]
-                    [ text "Speichern" ]
-                ]
-            , div [ class "control" ]
-                [ button
-                    [ class "button is-light"
-                    , onClick CancelEditTimeEntry
-                    ]
-                    [ text "Abbrechen" ]
-                ]
-            ]
-        , viewTimeEntriesListWithEdit model
-        ]
-
-
-viewTimeEntriesListWithEdit : Model -> Html Msg
-viewTimeEntriesListWithEdit model =
-    div [ class "box" ]
-        [ if List.isEmpty model.timeEntries then
-            p [ class "has-text-centered" ] [ text "Keine Einträge vorhanden" ]
-
-          else
-            table [ class "table is-fullwidth is-striped is-hoverable" ]
-                [ thead []
-                    [ tr []
-                        [ th [] [ text "Mitarbeiter" ]
-                        , th [] [ text "Datum" ]
-                        , th [] [ text "Zeit" ]
-                        , th [] [ text "Typ" ]
-                        , th [ class "has-text-right" ] [ text "Stunden" ]
-                        , th [ class "has-text-centered" ] [ text "Aktionen" ]
-                        ]
-                    ]
-                , tbody []
-                    (List.map (viewTimeEntryRowWithEdit model) model.timeEntries)
-                ]
-        ]
-
-
-viewTimeEntryRowWithEdit : Model -> TimeEntry -> Html Msg
-viewTimeEntryRowWithEdit model entry =
-    let
-        hours =
-            calculateHours entry.startTime entry.endTime
-
-        isEditing =
-            model.editingTimeEntryId == Just entry.id
-    in
-    if isEditing then
-        tr []
-            [ td [] [ text entry.username ]
-            , td []
-                [ input
-                    [ class "input is-small"
-                    , type_ "date"
-                    , value model.editingTimeEntry.date
-                    , onInput UpdateEditTimeEntryDate
-                    ]
-                    []
-                ]
-            , td []
-                [ div [ class "field is-grouped" ]
-                    [ div [ class "control" ]
-                        [ input
-                            [ class "input is-small"
-                            , type_ "time"
-                            , value model.editingTimeEntry.startTime
-                            , onInput UpdateEditTimeEntryStartTime
-                            ]
-                            []
-                        ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input is-small"
-                            , type_ "time"
-                            , value model.editingTimeEntry.endTime
-                            , onInput UpdateEditTimeEntryEndTime
-                            ]
-                            []
-                        ]
-                    ]
-                ]
-            , td []
-                [ div [ class "select is-small" ]
-                    [ select [ value model.editingTimeEntry.entryType, onInput UpdateEditTimeEntryType ]
-                        [ option [ value "lesson" ] [ text "Unterricht" ]
-                        , option [ value "break" ] [ text "Pause" ]
-                        ]
-                    ]
-                ]
-            , td [ class "has-text-right" ] [ text "" ]
-            , td [ class "has-text-centered" ]
-                [ button [ class "button is-small is-success mr-2", onClick SaveEditTimeEntry ] [ text "✓" ]
-                , button [ class "button is-small is-light", onClick CancelEditTimeEntry ] [ text "✕" ]
-                ]
-            ]
-
-    else
-        tr []
-            [ td [] [ text entry.username ]
-            , td [] [ text entry.date ]
-            , td [] [ text (entry.startTime ++ " - " ++ entry.endTime) ]
-            , td [] [ text entry.entryType ]
-            , td [ class "has-text-right" ] [ text (String.fromFloat hours ++ " Std.") ]
-            , td [ class "has-text-centered" ]
-                [ button
-                    [ class "button is-small is-info mr-2"
-                    , onClick (EditTimeEntry entry.id)
-                    ]
-                    [ text "Bearbeiten" ]
-                , button
-                    [ class "button is-small is-danger"
-                    , onClick (ConfirmDeleteTimeEntry entry.id)
-                    ]
-                    [ text "Löschen" ]
-                ]
-            ]
-
-
-viewWeeklyHoursSummary : Model -> Html Msg
-viewWeeklyHoursSummary model =
-    let
-        filteredHours =
-            List.filter
-                (\h -> h.week == model.currentWeek && h.year == model.currentYear)
-                model.weeklyHours
-    in
-    div [ class "box" ]
-        [ if List.isEmpty filteredHours then
-            p [ class "has-text-centered" ] [ text "Keine Einträge für diese Woche" ]
-
-          else
-            table [ class "table is-fullwidth is-striped" ]
-                [ thead []
-                    [ tr []
-                        [ th [] [ text "Mitarbeiter" ]
-                        , th [ class "has-text-right" ] [ text "Arbeitet" ]
-                        , th [ class "has-text-right" ] [ text "Soll" ]
-                        , th [ class "has-text-right" ] [ text "Verbleibend" ]
-                        , th [] [ text "Fortschritt" ]
-                        ]
-                    ]
-                , tbody []
-                    (List.map viewWeeklyHoursRow filteredHours)
-                , tfoot []
-                    [ tr [ class "has-background-light" ]
-                        [ th [] [ text "Gesamt" ]
-                        , th [ class "has-text-right has-text-weight-bold" ]
-                            [ text (String.fromFloat (List.sum (List.map .totalHours filteredHours)) ++ " Std.") ]
-                        , th [ class "has-text-right has-text-weight-bold" ]
-                            [ text (String.fromFloat (List.sum (List.map .targetHours filteredHours)) ++ " Std.") ]
-                        , th [] [ text "" ]
-                        , th [] [ text "" ]
-                        ]
-                    ]
-                ]
-        ]
-
-
-viewWeeklyHoursRow : WeeklyHours -> Html Msg
-viewWeeklyHoursRow hours =
-    let
-        progressPercent =
-            Basics.min 100 (hours.totalHours / hours.targetHours * 100)
-
-        progressColor =
-            if hours.totalHours >= hours.targetHours then
-                "is-success"
-
-            else if hours.totalHours >= hours.targetHours * 0.8 then
-                "is-info"
-
-            else
-                "is-warning"
-    in
-    tr []
-        [ td [] [ text hours.username ]
-        , td [ class "has-text-right" ] [ text (String.fromFloat hours.totalHours ++ " Std.") ]
-        , td [ class "has-text-right" ] [ text (String.fromFloat hours.targetHours ++ " Std.") ]
-        , td [ class "has-text-right" ] [ text (String.fromFloat hours.remainingHours ++ " Std.") ]
-        , td []
-            [ progress
-                [ class ("progress " ++ progressColor)
-                , value (String.fromFloat progressPercent)
-                , Html.Attributes.max "100"
-                ]
-                []
-            ]
-        ]
-
-
-viewAdminManualEntryForm : Model -> Html Msg
-viewAdminManualEntryForm model =
-    div [ class "box has-background-info-light" ]
-        [ h3 [ class "subtitle" ] [ text "Manuelle Stundeneintragung" ]
-        , p [ class "help mb-3" ]
-            [ text "Positive Werte = Abzug, Negative Werte = Hinzurechnung" ]
-        , div [ class "columns" ]
-            [ div [ class "column is-4" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Mitarbeiter" ]
-                    , div [ class "control" ]
-                        [ div [ class "select is-fullwidth" ]
-                            [ select [ onInput (SelectUserForManualEntry << Maybe.withDefault 0 << String.toInt) ]
-                                (option [ value "" ] [ text "-- Wählen --" ]
-                                    :: List.map
-                                        (\u ->
-                                            option [ value (String.fromInt u.id), selected (model.adminManualEntryForm.selectedUserId == Just u.id) ] [ text u.username ]
-                                        )
-                                        model.users
-                                )
-                            ]
-                        ]
-                    ]
-                ]
-            , div [ class "column is-4" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Datum" ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input"
-                            , type_ "date"
-                            , value model.adminManualEntryForm.date
-                            , onInput UpdateManualEntryDate
-                            ]
-                            []
-                        ]
-                    ]
-                ]
-            , div [ class "column is-4" ]
-                [ div [ class "field" ]
-                    [ label [ class "label" ] [ text "Stunden (z.B. 2.5 oder -1.0)" ]
-                    , div [ class "control" ]
-                        [ input
-                            [ class "input"
-                            , type_ "number"
-                            , step "0.5"
-                            , placeholder "z.B. 2.5 oder -1.0"
-                            , value model.adminManualEntryForm.hours
-                            , onInput UpdateManualEntryHours
-                            ]
-                            []
-                        ]
-                    , p [ class "help" ]
-                        [ text "Positiv: Wird abgezogen | Negativ: Wird hinzugerechnet" ]
-                    ]
-                ]
-            ]
-        , div [ class "field is-grouped mt-4" ]
-            [ div [ class "control" ]
-                [ button
-                    [ class "button is-info"
-                    , onClick SaveAdminTimeEntry
-                    , disabled
-                        (case model.adminManualEntryForm.selectedUserId of
-                            Just _ ->
-                                model.isProcessing || String.isEmpty model.adminManualEntryForm.hours
-
-                            Nothing ->
-                                True
-                        )
-                    ]
-                    [ text "Eintrag erstellen" ]
-                ]
-            ]
-        ]
-
-
-viewYearlyHoursSummary : Model -> Html Msg
-viewYearlyHoursSummary model =
-    div [ class "box" ]
-        [ div [ class "level mb-4" ]
-            [ div [ class "level-left" ]
-                [ div [ class "level-item" ]
-                    [ h3 [ class "subtitle is-5 mb-0" ] [ text "Jahresübersicht" ]
-                    ]
-                ]
-            , div [ class "level-right" ]
-                [ div [ class "level-item" ]
-                    [ a
-                        [ class "button is-info"
-                        , onClick DownloadYearlySummaryPDF
-                        , disabled model.isProcessing
-                        ]
-                        [ span [ class "icon" ]
-                            [ i [ class "fas fa-file-pdf" ] [] ]
-                        , span []
-                            [ text
-                                (if model.isProcessing then
-                                    "Wird erstellt..."
-
-                                 else
-                                    "PDF exportieren"
-                                )
-                            ]
-                        ]
-                    ]
-                ]
-            ]
-        , if List.isEmpty model.yearlyHoursSummary then
-            p [ class "has-text-centered" ] [ text "Keine Daten vorhanden" ]
-
-          else
-            table [ class "table is-fullwidth is-striped is-hoverable" ]
-                [ thead []
-                    [ tr []
-                        [ th [] [ text "Mitarbeiter" ]
-                        , th [ class "has-text-right" ] [ text "Sollen (Stunden)" ]
-                        , th [ class "has-text-right" ] [ text "Iststand (Stunden)" ]
-                        , th [ class "has-text-right" ] [ text "Differenz (Stunden)" ]
-                        , th [ class "has-text-centered" ] [ text "Status" ]
-                        ]
-                    ]
-                , tbody []
-                    (List.map viewYearlyHourRow model.yearlyHoursSummary)
-                ]
-        ]
-
-
-viewYearlyHourRow : YearlyHoursSummary -> Html Msg
-viewYearlyHourRow summary =
-    let
-        statusClass =
-            if summary.remainingYearly > 0 then
-                "has-text-danger"
-
-            else if abs summary.remainingYearly < 0.5 then
-                "has-text-success"
-
-            else
-                "has-text-warning"
-    in
-    tr []
-        [ td [] [ text summary.username ]
-        , td [ class "has-text-right" ] [ text (String.fromFloat summary.yearlyTarget) ]
-        , td [ class "has-text-right" ] [ text (String.fromFloat summary.yearlyActual) ]
-        , td [ class "has-text-right" ] [ text (String.fromFloat summary.remainingYearly) ]
-        , td [ class ("has-text-centered " ++ statusClass) ]
-            [ if summary.remainingYearly > 0 then
-                text ("Offen: " ++ String.fromFloat summary.remainingYearly)
-
-              else if summary.remainingYearly < -0.5 then
-                text ("Zu viel: " ++ String.fromFloat (abs summary.remainingYearly))
-
-              else
-                text "✓ Erfüllt"
-            ]
-        ]
diff --git a/frontend/src/View/Components/Navigation.elm b/frontend/src/View/Components/Navigation.elm
deleted file mode 100644
index ba3895d..0000000
--- a/frontend/src/View/Components/Navigation.elm
+++ /dev/null
@@ -1,99 +0,0 @@
-module View.Components.Navigation exposing (viewDayMobile, viewWeekNavigation)
-
-import Html exposing (..)
-import Html.Attributes exposing (..)
-import Html.Events exposing (..)
-import Types.Model exposing (Model, Schedule)
-import Types.Msg exposing (Msg(..))
-import View.Components.Schedule exposing (viewScheduleItemWithDay)
-
-
-viewWeekNavigation : Model -> Html Msg
-viewWeekNavigation model =
-    let
-        dateRange =
-            case model.weekDates of
-                Just wd ->
-                    wd.range
-
-                Nothing ->
-                    "Laden..."
-    in
-    div [ class "box" ]
-        [ nav [ class "level" ]
-            [ div [ class "level-left" ]
-                [ div [ class "level-item" ]
-                    [ button
-                        [ class "button is-primary"
-                        , onClick PreviousWeek
-                        ]
-                        [ span [ class "icon" ]
-                            [ i [ class "fas fa-chevron-left" ] [] ]
-                        , span [] [ text "Vorherige Woche" ]
-                        ]
-                    ]
-                ]
-            , div [ class "level-item" ]
-                [ div
-                    [ style "display" "flex"
-                    , style "flex-direction" "column"
-                    , style "align-items" "center"
-                    , style "gap" "0.5rem"
-                    , style "min-width" "250px"
-                    ]
-                    [ p
-                        [ class "heading"
-                        , style "margin" "0"
-                        , style "line-height" "1.2"
-                        ]
-                        [ text "Kalenderwoche" ]
-                    , p
-                        [ class "title is-3"
-                        , style "margin" "0"
-                        , style "line-height" "1.2"
-                        ]
-                        [ text ("KW " ++ String.fromInt model.currentWeek ++ " / " ++ String.fromInt model.currentYear) ]
-                    , p
-                        [ class "subtitle is-6"
-                        , style "margin" "0"
-                        , style "line-height" "1.2"
-                        ]
-                        [ text dateRange ]
-                    ]
-                ]
-            , div [ class "level-right" ]
-                [ div [ class "level-item" ]
-                    [ button
-                        [ class "button is-primary"
-                        , onClick NextWeek
-                        ]
-                        [ span [] [ text "Nächste Woche" ]
-                        , span [ class "icon" ]
-                            [ i [ class "fas fa-chevron-right" ] [] ]
-                        ]
-                    ]
-                ]
-            ]
-        ]
-
-
-viewDayMobile : Model -> String -> ( Int, List Schedule ) -> Html Msg
-viewDayMobile model dayName ( dayOfWeek, schedules ) =
-    let
-        dateForDay =
-            case model.weekDates of
-                Just wd ->
-                    wd.dates
-                        |> List.filter (\( day, _ ) -> day == String.fromInt dayOfWeek)
-                        |> List.head
-                        |> Maybe.map Tuple.second
-                        |> Maybe.withDefault "N/A"
-
-                Nothing ->
-                    "Laden..."
-    in
-    div [ class "box mb-4" ]
-        [ p [ class "has-text-weight-bold has-text-centered mb-3" ]
-            [ text (dayName ++ " - " ++ dateForDay) ]
-        , div [] (List.map (viewScheduleItemWithDay model dayOfWeek) schedules)
-        ]
diff --git a/frontend/src/View/Components/Schedule.elm b/frontend/src/View/Components/Schedule.elm
deleted file mode 100644
index 57730bb..0000000
--- a/frontend/src/View/Components/Schedule.elm
+++ /dev/null
@@ -1,76 +0,0 @@
-module View.Components.Schedule exposing (viewScheduleItemWithDay)
-
-import Html exposing (..)
-import Html.Attributes exposing (..)
-import Html.Events exposing (..)
-import Types.Model exposing (Model, Schedule)
-import Types.Msg exposing (Msg(..))
-
-
-viewScheduleItemWithDay : Model -> Int -> Schedule -> Html Msg
-viewScheduleItemWithDay model dayOfWeek schedule =
-    let
-        isSelected =
-            List.any (\e -> e.scheduleId == schedule.id && e.dayOfWeek == dayOfWeek) model.selectedEntries
-
-        isClickable =
-            (not model.hasEntriesForCurrentWeek || model.weekEditMode) && not model.isProcessing
-
-        boxClass =
-            if isSelected then
-                "box has-background-success-light"
-
-            else if isClickable then
-                "box has-background-white"
-
-            else
-                "box has-background-light"
-
-        typeText =
-            if schedule.scheduleType == "break" then
-                " (Pause)"
-
-            else
-                ""
-
-        cursorStyle =
-            if isClickable then
-                "pointer"
-
-            else
-                "not-allowed"
-
-        opacity =
-            if isClickable || isSelected then
-                "1"
-
-            else
-                "0.6"
-    in
-    div
-        [ class boxClass
-        , onClick
-            (if isClickable then
-                ToggleScheduleSelection schedule.id dayOfWeek
-
-             else
-                FetchSchedules
-            )
-        , style "cursor" cursorStyle
-        , style "margin-bottom" "0.5rem"
-        , style "padding" "0.75rem"
-        , style "opacity" opacity
-        , style "transition" "all 0.2s ease"
-        , style "border"
-            (if isClickable && not isSelected then
-                "2px solid transparent"
-
-             else
-                "2px solid currentColor"
-            )
-        ]
-        [ p [ class "has-text-weight-bold is-size-7" ]
-            [ text (schedule.startTime ++ " - " ++ schedule.endTime) ]
-        , p [ class "is-size-7" ]
-            [ text (schedule.title ++ typeText) ]
-        ]
diff --git a/frontend/src/View/Components/Toast.elm b/frontend/src/View/Components/Toast.elm
deleted file mode 100644
index e55d2fe..0000000
--- a/frontend/src/View/Components/Toast.elm
+++ /dev/null
@@ -1,66 +0,0 @@
-module View.Components.Toast exposing (viewToasts)
-
-import Html exposing (..)
-import Html.Attributes exposing (..)
-import Html.Events exposing (..)
-import Types.Model exposing (Model, Schedule, Toast, ToastType(..))
-import Types.Msg exposing (Msg(..))
-import Utils.TimeUtils exposing (calculateHours)
-import View.Components.Navigation exposing (viewDayMobile, viewWeekNavigation)
-import View.Components.Schedule exposing (viewScheduleItemWithDay)
-
-
-viewToasts : List Toast -> Html Msg
-viewToasts toasts =
-    div [ class "toast-container" ]
-        (List.map viewToast toasts)
-
-
-viewToast : Toast -> Html Msg
-viewToast toast =
-    let
-        toastClass =
-            case toast.toastType of
-                ErrorToast ->
-                    "toast-error"
-
-                SuccessToast ->
-                    "toast-success"
-
-                InfoToast ->
-                    "toast-info"
-
-                WarningToast ->
-                    "toast-warning"
-
-        icon =
-            case toast.toastType of
-                ErrorToast ->
-                    "fas fa-exclamation-circle"
-
-                SuccessToast ->
-                    "fas fa-check-circle"
-
-                InfoToast ->
-                    "fas fa-info-circle"
-
-                WarningToast ->
-                    "fas fa-exclamation-triangle"
-    in
-    div [ class ("toast " ++ toastClass), style "animation" "slideIn 0.3s ease-out" ]
-        [ div [ class "toast-content" ]
-            [ span [ class "toast-icon" ]
-                [ i [ class icon ] [] ]
-            , span [ class "toast-message" ] [ text toast.message ]
-            ]
-        , if toast.dismissible then
-            button
-                [ class "toast-close"
-                , onClick (DismissToast toast.id)
-                , attribute "aria-label" "Schließen"
-                ]
-                [ i [ class "fas fa-times" ] [] ]
-
-          else
-            text ""
-        ]
diff --git a/frontend/src/View/Login.elm b/frontend/src/View/Login.elm
deleted file mode 100644
index 9ed2485..0000000
--- a/frontend/src/View/Login.elm
+++ /dev/null
@@ -1,57 +0,0 @@
-module View.Login exposing (viewLogin)
-
-import Html exposing (..)
-import Html.Attributes exposing (..)
-import Html.Events exposing (..)
-import Types.Model exposing (Model)
-import Types.Msg exposing (Msg(..))
-
-
-viewLogin : Model -> Html Msg
-viewLogin model =
-    section [ class "section" ]
-        [ div [ class "container" ]
-            [ div [ class "columns is-centered" ]
-                [ div [ class "column is-5-tablet is-4-desktop is-3-widescreen" ]
-                    [ div [ class "box" ]
-                        [ h1 [ class "title has-text-centered" ] [ text "Zeiterfassung Login" ]
-                        , div [ class "field" ]
-                            [ label [ class "label" ] [ text "Benutzername" ]
-                            , div [ class "control" ]
-                                [ input
-                                    [ class "input"
-                                    , type_ "text"
-                                    , placeholder "Benutzername"
-                                    , value model.username
-                                    , onInput UpdateUsername
-                                    ]
-                                    []
-                                ]
-                            ]
-                        , div [ class "field" ]
-                            [ label [ class "label" ] [ text "Passwort" ]
-                            , div [ class "control" ]
-                                [ input
-                                    [ class "input"
-                                    , type_ "password"
-                                    , placeholder "Passwort"
-                                    , value model.password
-                                    , onInput UpdatePassword
-                                    ]
-                                    []
-                                ]
-                            ]
-                        , div [ class "field" ]
-                            [ div [ class "control" ]
-                                [ button
-                                    [ class "button is-primary is-fullwidth"
-                                    , onClick Login
-                                    ]
-                                    [ text "Anmelden" ]
-                                ]
-                            ]
-                        ]
-                    ]
-                ]
-            ]
-        ]
diff --git a/frontend/src/View/UserDashboard.elm b/frontend/src/View/UserDashboard.elm
deleted file mode 100644
index 60fac13..0000000
--- a/frontend/src/View/UserDashboard.elm
+++ /dev/null
@@ -1,338 +0,0 @@
-module View.UserDashboard exposing (viewUserDashboard)
-
-import Html exposing (..)
-import Html.Attributes exposing (..)
-import Html.Events exposing (..)
-import Types.Model exposing (Model, Schedule)
-import Types.Msg exposing (Msg(..))
-import Utils.TimeUtils exposing (calculateHours)
-import View.Components.Navigation exposing (viewDayMobile, viewWeekNavigation)
-import View.Components.Schedule exposing (viewScheduleItemWithDay)
-
-
-viewUserDashboard : Model -> Html Msg
-viewUserDashboard model =
-    div []
-        [ nav [ class "navbar is-primary" ]
-            [ div [ class "navbar-brand" ]
-                [ div [ class "navbar-item" ]
-                    [ h1 [ class "title is-4 has-text-white" ] [ text "Zeiterfassung" ]
-                    ]
-                , a
-                    [ class
-                        ("navbar-burger"
-                            ++ (if model.mobileMenuOpen then
-                                    " is-active"
-
-                                else
-                                    ""
-                               )
-                        )
-                    , attribute "role" "navigation"
-                    , attribute "aria-label" "menu"
-                    , attribute "aria-expanded"
-                        (if model.mobileMenuOpen then
-                            "true"
-
-                         else
-                            "false"
-                        )
-                    , onClick ToggleMobileMenu
-                    ]
-                    [ span [ attribute "aria-hidden" "true" ] []
-                    , span [ attribute "aria-hidden" "true" ] []
-                    , span [ attribute "aria-hidden" "true" ] []
-                    ]
-                ]
-            , div
-                [ id "navbarUser"
-                , class
-                    ("navbar-menu"
-                        ++ (if model.mobileMenuOpen then
-                                " is-active"
-
-                            else
-                                ""
-                           )
-                    )
-                ]
-                [ div [ class "navbar-end" ]
-                    [ div [ class "navbar-item" ]
-                        [ span [ class "has-text-white mr-2" ] [ text model.username ]
-                        ]
-                    , div [ class "navbar-item" ]
-                        [ button [ class "button is-light", onClick Logout ]
-                            [ span [ class "icon" ]
-                                [ i [ class "fas fa-sign-out-alt" ] [] ]
-                            , span [] [ text "Abmelden" ]
-                            ]
-                        ]
-                    ]
-                ]
-            ]
-        , section [ class "section" ]
-            [ div [ class "container" ]
-                [ viewWeekNavigation model
-                , h2 [ class "title" ] [ text "Stundenplan" ]
-                , if model.hasEntriesForCurrentWeek && not model.weekEditMode then
-                    div [ class "notification is-success" ]
-                        [ div [ class "level" ]
-                            [ div [ class "level-left" ]
-                                [ div [ class "level-item" ]
-                                    [ span [ class "icon" ]
-                                        [ i [ class "fas fa-check-circle" ] [] ]
-                                    , span [] [ text "Diese Woche wurde bereits erfasst" ]
-                                    ]
-                                ]
-                            , div [ class "level-right" ]
-                                [ div [ class "level-item" ]
-                                    [ button
-                                        [ class "button is-warning"
-                                        , onClick EnableEditMode
-                                        , disabled model.isProcessing
-                                        ]
-                                        [ text "Bearbeiten" ]
-                                    ]
-                                ]
-                            ]
-                        ]
-
-                  else if model.weekEditMode then
-                    div [ class "notification is-warning" ]
-                        [ div [ class "level" ]
-                            [ div [ class "level-left" ]
-                                [ div [ class "level-item" ]
-                                    [ span [ class "icon" ]
-                                        [ i [ class "fas fa-edit" ] [] ]
-                                    , span [] [ text "Bearbeitungsmodus aktiv" ]
-                                    ]
-                                ]
-                            , div [ class "level-right" ]
-                                [ div [ class "level-item" ]
-                                    [ button
-                                        [ class "button is-danger is-small mr-2"
-                                        , onClick DeleteWeekEntries
-                                        , disabled model.isProcessing
-                                        ]
-                                        [ text "Einträge löschen" ]
-                                    , button
-                                        [ class "button is-light is-small"
-                                        , onClick DisableEditMode
-                                        ]
-                                        [ text "Abbrechen" ]
-                                    ]
-                                ]
-                            ]
-                        ]
-
-                  else
-                    div [ class "notification is-info is-light" ]
-                        [ text "Wählen Sie die Zeiten aus, die Sie in dieser Woche gearbeitet haben." ]
-                , viewScheduleGridWithWeek model
-                , if not model.hasEntriesForCurrentWeek || model.weekEditMode then
-                    div [ class "field mt-4" ]
-                        [ div [ class "control" ]
-                            [ button
-                                [ class "button is-primary is-large is-fullwidth"
-                                , onClick SaveTimeEntries
-                                , disabled (List.isEmpty model.selectedEntries || model.isProcessing)
-                                ]
-                                [ if model.isProcessing then
-                                    span [ class "icon" ] [ i [ class "fas fa-spinner fa-pulse" ] [] ]
-
-                                  else
-                                    text ""
-                                , text
-                                    (if model.weekEditMode then
-                                        "Änderungen speichern"
-
-                                     else
-                                        "Speichern"
-                                    )
-                                ]
-                            ]
-                        ]
-
-                  else
-                    text ""
-                , h3 [ class "subtitle mt-6" ] [ text "Jahresgesamtzeit" ]
-                , viewUserYearlyTotal model
-                ]
-            ]
-        ]
-
-
-viewScheduleGridWithWeek : Model -> Html Msg
-viewScheduleGridWithWeek model =
-    let
-        days =
-            [ "Montag", "Dienstag", "Mittwoch", "Donnerstag", "Freitag" ]
-
-        groupedSchedules =
-            List.range 0 4
-                |> List.map
-                    (\day ->
-                        ( day, List.filter (\s -> s.dayOfWeek == day) model.schedules )
-                    )
-    in
-    div []
-        [ div [ class "is-hidden-mobile" ]
-            [ div [ class "table-container" ]
-                [ table [ class "table is-bordered is-fullwidth" ]
-                    [ thead []
-                        [ tr [] (List.map (\day -> th [ class "has-text-centered" ] [ text day ]) days)
-                        ]
-                    , tbody []
-                        [ tr []
-                            (List.map (viewDayColumnWithWeek model) groupedSchedules)
-                        ]
-                    ]
-                ]
-            ]
-        , div [ class "is-hidden-tablet" ]
-            (List.map2 (viewDayMobile model) days groupedSchedules)
-        ]
-
-
-viewUserYearlyTotal : Model -> Html Msg
-viewUserYearlyTotal model =
-    let
-        yearlyTotal =
-            model.timeEntries
-                |> List.map
-                    (\entry ->
-                        if entry.entryType == "lesson" then
-                            1.0
-
-                        else
-                            Utils.TimeUtils.calculateHours entry.startTime entry.endTime
-                    )
-                |> List.sum
-
-        userTarget =
-            List.filter (\u -> not u.isAdmin) model.users
-                |> List.head
-                |> Maybe.map .yearlyWorkHours
-                |> Maybe.withDefault 60
-
-        remaining =
-            userTarget - yearlyTotal
-
-        progressPercent =
-            Basics.min 100 (yearlyTotal / userTarget * 100)
-
-        progressColor =
-            if remaining <= 0 then
-                "is-success"
-
-            else if yearlyTotal >= userTarget * 0.8 then
-                "is-info"
-
-            else
-                "is-warning"
-    in
-    div [ class "box" ]
-        [ div [ class "columns" ]
-            [ div [ class "column" ]
-                [ p [ class "heading" ] [ text "Jahresenziel" ]
-                , p [ class "title" ] [ text (String.fromFloat userTarget ++ " Std.") ]
-                ]
-            , div [ class "column" ]
-                [ p [ class "heading" ] [ text "Geleistete Stunden" ]
-                , p [ class "title" ] [ text (String.fromFloat yearlyTotal ++ " Std.") ]
-                ]
-            , div [ class "column" ]
-                [ p [ class "heading" ] [ text "Restliche Stunden" ]
-                , p
-                    [ class
-                        ("title is-4 "
-                            ++ (if remaining <= 0 then
-                                    "has-text-success"
-
-                                else
-                                    "has-text-warning"
-                               )
-                        )
-                    ]
-                    [ text (String.fromFloat (Basics.max 0 remaining) ++ " Std.") ]
-                ]
-            ]
-        , progress
-            [ class ("progress " ++ progressColor)
-            , value (String.fromFloat progressPercent)
-            , Html.Attributes.max "100"
-            ]
-            [ text (String.fromFloat progressPercent ++ "%") ]
-        ]
-
-
-viewDayColumnWithWeek : Model -> ( Int, List Schedule ) -> Html Msg
-viewDayColumnWithWeek model ( dayOfWeek, schedules ) =
-    let
-        dateForDay =
-            case model.weekDates of
-                Just wd ->
-                    wd.dates
-                        |> List.filter (\( day, _ ) -> day == String.fromInt dayOfWeek)
-                        |> List.head
-                        |> Maybe.map Tuple.second
-                        |> Maybe.withDefault "N/A"
-
-                Nothing ->
-                    "Laden..."
-    in
-    td [ class "has-background-light", style "vertical-align" "top", style "min-width" "150px" ]
-        [ p [ class "has-text-centered has-text-weight-bold is-size-7 mb-2" ]
-            [ text dateForDay ]
-        , div [] (List.map (viewScheduleItemWithDay model dayOfWeek) schedules)
-        ]
-
-
-viewUserWeeklySummary : Model -> Html Msg
-viewUserWeeklySummary model =
-    case model.userWeeklySummary of
-        Just summary ->
-            let
-                progressPercent =
-                    Basics.min 100 (summary.totalHours / summary.targetHours * 100)
-
-                progressColor =
-                    if summary.totalHours >= summary.targetHours then
-                        "is-success"
-
-                    else if summary.totalHours >= summary.targetHours * 0.8 then
-                        "is-info"
-
-                    else
-                        "is-warning"
-            in
-            div [ class "box" ]
-                [ div [ class "columns" ]
-                    [ div [ class "column" ]
-                        [ p [ class "heading" ] [ text "Arbeitszeit diese Woche" ]
-                        , p [ class "title" ] [ text (String.fromFloat summary.totalHours ++ " Std.") ]
-                        , p [ class "subtitle is-6" ] [ text ("von " ++ String.fromFloat summary.targetHours ++ " Std.") ]
-                        ]
-                    , div [ class "column" ]
-                        [ p [ class "heading" ] [ text "Verbleibend" ]
-                        , p [ class "title is-4", classList [ ( "has-text-success", summary.remainingHours <= 0 ) ] ]
-                            [ text (String.fromFloat summary.remainingHours ++ " Std.") ]
-                        , if summary.remainingHours < 0 then
-                            p [ class "subtitle is-6 has-text-success" ] [ text "✓ Ziel erreicht!" ]
-
-                          else
-                            p [ class "subtitle is-6" ] [ text "" ]
-                        ]
-                    ]
-                , progress
-                    [ class ("progress " ++ progressColor)
-                    , value (String.fromFloat progressPercent)
-                    , Html.Attributes.max "100"
-                    ]
-                    [ text (String.fromFloat progressPercent ++ "%") ]
-                ]
-
-        Nothing ->
-            div [ class "box" ]
-                [ p [ class "has-text-centered has-text-grey" ] [ text "Laden..." ]
-                ]
diff --git a/frontend/src/View/View.elm b/frontend/src/View/View.elm
deleted file mode 100644
index c16d910..0000000
--- a/frontend/src/View/View.elm
+++ /dev/null
@@ -1,29 +0,0 @@
-module View.View exposing (view)
-
-import Html exposing (Html, div)
-import Html.Attributes exposing (class)
-import Types.Model exposing (Model)
-import Types.Msg exposing (Msg(..))
-import Types.Page exposing (Page(..))
-import View.AdminDashboard exposing (viewAdminDashboard)
-import View.Components.Toast exposing (viewToasts)
-import View.Login exposing (viewLogin)
-import View.UserDashboard exposing (viewUserDashboard)
-
-
-view : Model -> Html Msg
-view model =
-    div [ class "app-container" ]
-        [ viewToasts model.toasts
-        , div [ class "container" ]
-            [ case model.page of
-                LoginPage ->
-                    viewLogin model
-
-                UserDashboard ->
-                    viewUserDashboard model
-
-                AdminDashboard ->
-                    viewAdminDashboard model
-            ]
-        ]
diff --git a/frontend/src/app.css b/frontend/src/app.css
new file mode 100644
index 0000000..4c1b0c2
--- /dev/null
+++ b/frontend/src/app.css
@@ -0,0 +1,2 @@
+@import "tailwindcss";
+@plugin "daisyui";
diff --git a/frontend/src/assets/svelte.svg b/frontend/src/assets/svelte.svg
new file mode 100644
index 0000000..c5e0848
--- /dev/null
+++ b/frontend/src/assets/svelte.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" aria-hidden="true" role="img" class="iconify iconify--logos" width="26.6" height="32" preserveAspectRatio="xMidYMid meet" viewBox="0 0 256 308"><path fill="#FF3E00" d="M239.682 40.707C211.113-.182 154.69-12.301 113.895 13.69L42.247 59.356a82.198 82.198 0 0 0-37.135 55.056a86.566 86.566 0 0 0 8.536 55.576a82.425 82.425 0 0 0-12.296 30.719a87.596 87.596 0 0 0 14.964 66.244c28.574 40.893 84.997 53.007 125.787 27.016l71.648-45.664a82.182 82.182 0 0 0 37.135-55.057a86.601 86.601 0 0 0-8.53-55.577a82.409 82.409 0 0 0 12.29-30.718a87.573 87.573 0 0 0-14.963-66.244"></path><path fill="#FFF" d="M106.889 270.841c-23.102 6.007-47.497-3.036-61.103-22.648a52.685 52.685 0 0 1-9.003-39.85a49.978 49.978 0 0 1 1.713-6.693l1.35-4.115l3.671 2.697a92.447 92.447 0 0 0 28.036 14.007l2.663.808l-.245 2.659a16.067 16.067 0 0 0 2.89 10.656a17.143 17.143 0 0 0 18.397 6.828a15.786 15.786 0 0 0 4.403-1.935l71.67-45.672a14.922 14.922 0 0 0 6.734-9.977a15.923 15.923 0 0 0-2.713-12.011a17.156 17.156 0 0 0-18.404-6.832a15.78 15.78 0 0 0-4.396 1.933l-27.35 17.434a52.298 52.298 0 0 1-14.553 6.391c-23.101 6.007-47.497-3.036-61.101-22.649a52.681 52.681 0 0 1-9.004-39.849a49.428 49.428 0 0 1 22.34-33.114l71.664-45.677a52.218 52.218 0 0 1 14.563-6.398c23.101-6.007 47.497 3.036 61.101 22.648a52.685 52.685 0 0 1 9.004 39.85a50.559 50.559 0 0 1-1.713 6.692l-1.35 4.116l-3.67-2.693a92.373 92.373 0 0 0-28.037-14.013l-2.664-.809l.246-2.658a16.099 16.099 0 0 0-2.89-10.656a17.143 17.143 0 0 0-18.398-6.828a15.786 15.786 0 0 0-4.402 1.935l-71.67 45.674a14.898 14.898 0 0 0-6.73 9.975a15.9 15.9 0 0 0 2.709 12.012a17.156 17.156 0 0 0 18.404 6.832a15.841 15.841 0 0 0 4.402-1.935l27.345-17.427a52.147 52.147 0 0 1 14.552-6.397c23.101-6.006 47.497 3.037 61.102 22.65a52.681 52.681 0 0 1 9.003 39.848a49.453 49.453 0 0 1-22.34 33.12l-71.664 45.673a52.218 52.218 0 0 1-14.563 6.398"></path></svg>
\ No newline at end of file
diff --git a/frontend/src/components/AdminDashboard.svelte b/frontend/src/components/AdminDashboard.svelte
new file mode 100644
index 0000000..09c0e7c
--- /dev/null
+++ b/frontend/src/components/AdminDashboard.svelte
@@ -0,0 +1,188 @@
+<script>
+  import { auth } from '../lib/stores';
+  import { logout } from '../lib/api';
+  
+  import AdminScheduleTab from './admin/AdminScheduleTab.svelte';
+  import AdminUsersTab from './admin/AdminUsersTab.svelte';
+  import AdminTimeEntriesTab from './admin/AdminTimeEntriesTab.svelte';
+  import AdminSchoolYearsTab from './admin/AdminSchoolYearsTab.svelte';
+  import AdminSettingsTab from './admin/AdminSettingsTab.svelte';
+
+  let activeTab = 'schedule';
+  const user = $auth.user;
+
+  $: pageTitle = getPageTitle(activeTab);
+  
+  function getPageTitle(tab) {
+      switch(tab) {
+          case 'schedule': return 'Stundenplan Konfiguration';
+          case 'users': return 'Benutzerverwaltung';
+          case 'timeEntries': return 'Zeiteinträge & Buchungen';
+          case 'schoolYears': return 'Schuljahre & Perioden';
+          case 'settings': return 'Einstellungen';
+          default: return 'Admin';
+      }
+  }
+
+  let isDrawerOpen = false;
+  function closeDrawer() { isDrawerOpen = false; }
+</script>
+
+<div class="drawer lg:drawer-open">
+  
+  <input id="admin-drawer" type="checkbox" class="drawer-toggle" bind:checked={isDrawerOpen} />
+  
+  <div class="drawer-content flex flex-col bg-base-200 min-h-screen">
+    
+    <div class="navbar bg-base-100 shadow-sm border-b border-base-200 sticky top-0 z-30 px-4 sm:px-8">
+        <div class="flex-none lg:hidden">
+            <label for="admin-drawer" class="btn btn-square btn-ghost">
+                <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" class="inline-block w-6 h-6 stroke-current"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 6h16M4 12h16M4 18h16"></path></svg>
+            </label>
+        </div>
+        
+        <div class="flex-1">
+            <div class="text-sm breadcrumbs hidden sm:block">
+                <ul>
+                    <li class="opacity-50">Admin</li>
+                    <li class="font-bold text-primary">{pageTitle}</li>
+                </ul>
+            </div>
+            <span class="font-bold text-lg sm:hidden">{pageTitle}</span>
+        </div>
+        
+        <div class="flex-none flex items-center gap-4">
+            <div class="hidden sm:block text-right leading-tight">
+                <div class="font-bold text-sm">{$auth.user?.username}</div>
+                <div class="text-xs opacity-50">Administrator</div>
+            </div>
+            
+            <div class="dropdown dropdown-end">
+                <div tabindex="0" role="button" class="btn btn-ghost btn-circle avatar placeholder">
+                    <div class="bg-neutral text-neutral-content rounded-full w-10">
+                        <span class="text-xl">{user?.username?.charAt(0).toUpperCase()}</span>
+                    </div>
+                </div>
+                <ul tabindex="0" class="menu menu-sm dropdown-content mt-3 z-[1] p-2 shadow bg-base-100 rounded-box w-52">
+                    <li><button on:click={logout} class="text-error font-bold">Abmelden</button></li>
+                </ul>
+            </div>
+        </div>
+    </div>
+
+    <div class="p-4 md:p-8 lg:p-10 fade-in">
+        {#if activeTab === 'schedule'}
+            <AdminScheduleTab />
+        {:else if activeTab === 'users'}
+            <AdminUsersTab />
+        {:else if activeTab === 'timeEntries'}
+            <AdminTimeEntriesTab />
+        {:else if activeTab === 'schoolYears'}
+            <AdminSchoolYearsTab />
+        {:else if activeTab === 'settings'}
+            <AdminSettingsTab />
+        {/if}
+    </div>
+
+  </div> 
+  
+  <div class="drawer-side z-40">
+    <label for="admin-drawer" class="drawer-overlay"></label> 
+    
+    <aside class="bg-base-100 w-80 h-full flex flex-col border-r border-base-300">
+        <div class="p-6 border-b border-base-200">
+            <div class="flex items-center gap-3">
+                <div class="w-10 h-10 flex items-center justify-center">
+                    <img 
+                        src="/api/logo?t={Date.now()}" 
+                        alt="Logo" 
+                        class="w-full h-full object-contain"
+                        on:error={(e) => { 
+                            e.target.style.display='none'; 
+                            e.target.nextElementSibling.style.display='flex';
+                        }} 
+                    />
+                    <div class="hidden w-10 h-10 rounded bg-primary text-primary-content font-bold text-xl items-center justify-center">
+                        Z
+                    </div>
+                </div>
+                <div class="font-bold text-xl tracking-tight">Zeiterfassung</div>
+            </div>
+            <div class="text-xs font-mono opacity-50 mt-1 pl-14">Admin Dashboard</div>
+        </div>
+
+        <ul class="menu p-4 w-full gap-2 text-base font-medium flex-1">
+            
+            <li class="menu-title opacity-50 uppercase text-xs font-bold tracking-wider mt-2 mb-1">Verwaltung</li>
+            
+            <li>
+                <button 
+                    class="{activeTab === 'schedule' ? 'active bg-primary/10 text-primary' : ''}"
+                    on:click={() => { activeTab = 'schedule'; closeDrawer(); }}
+                >
+                    <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-5 h-5"><path stroke-linecap="round" stroke-linejoin="round" d="M6.75 3v2.25M17.25 3v2.25M3 18.75V7.5a2.25 2.25 0 012.25-2.25h13.5A2.25 2.25 0 0121 7.5v11.25m-18 0A2.25 2.25 0 005.25 21h13.5A2.25 2.25 0 0021 18.75m-18 0v-7.5A2.25 2.25 0 015.25 9h13.5A2.25 2.25 0 0121 11.25v7.5" /></svg>
+                    Stundenplan
+                </button>
+            </li>
+            <li>
+                <button 
+                    class="{activeTab === 'users' ? 'active bg-primary/10 text-primary' : ''}"
+                    on:click={() => { activeTab = 'users'; closeDrawer(); }}
+                >
+                    <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-5 h-5"><path stroke-linecap="round" stroke-linejoin="round" d="M15 19.128a9.38 9.38 0 002.625.372 9.337 9.337 0 004.121-.952 4.125 4.125 0 00-7.533-2.493M15 19.128v-.003c0-1.113-.285-2.16-.786-3.07M15 19.128v.106A12.318 12.318 0 018.624 21c-2.331 0-4.512-.645-6.374-1.766l-.001-.109a6.375 6.375 0 0111.964-3.07M12 6.375a3.375 3.375 0 11-6.75 0 3.375 3.375 0 016.75 0zm8.25 2.25a2.625 2.625 0 11-5.25 0 2.625 2.625 0 015.25 0z" /></svg>
+                    Benutzer
+                </button>
+            </li>
+
+            <li class="menu-title opacity-50 uppercase text-xs font-bold tracking-wider mt-4 mb-1">Daten</li>
+
+            <li>
+                <button 
+                    class="{activeTab === 'timeEntries' ? 'active bg-primary/10 text-primary' : ''}"
+                    on:click={() => { activeTab = 'timeEntries'; closeDrawer(); }}
+                >
+                    <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-5 h-5"><path stroke-linecap="round" stroke-linejoin="round" d="M12 6v6h4.5m4.5 0a9 9 0 11-18 0 9 9 0 0118 0z" /></svg>
+                    Zeiteinträge
+                </button>
+            </li>
+            <li>
+                <button 
+                    class="{activeTab === 'schoolYears' ? 'active bg-primary/10 text-primary' : ''}"
+                    on:click={() => { activeTab = 'schoolYears'; closeDrawer(); }}
+                >
+                    <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-5 h-5"><path stroke-linecap="round" stroke-linejoin="round" d="M6.75 3v2.25M17.25 3v2.25M3 18.75V7.5a2.25 2.25 0 012.25-2.25h13.5A2.25 2.25 0 0121 7.5v11.25m-18 0A2.25 2.25 0 005.25 21h13.5A2.25 2.25 0 0021 18.75m-18 0v-7.5A2.25 2.25 0 015.25 9h13.5A2.25 2.25 0 0121 11.25v7.5" /></svg>
+                    Schuljahre
+                </button>
+            </li>
+            <li class="menu-title opacity-50 uppercase text-xs font-bold tracking-wider mt-4 mb-1">System</li>
+            <li>
+                <button 
+                    class="{activeTab === 'settings' ? 'active bg-primary/10 text-primary' : ''}"
+                    on:click={() => { activeTab = 'settings'; closeDrawer(); }}
+                >
+                    <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-5 h-5"><path stroke-linecap="round" stroke-linejoin="round" d="M9.594 3.94c.09-.542.56-.94 1.11-.94h2.593c.55 0 1.02.398 1.11.94l.213 1.281c.063.374.313.686.645.87.074.04.147.083.22.127.324.196.72.257 1.075.124l1.217-.456a1.125 1.125 0 011.37.49l1.296 2.247a1.125 1.125 0 01-.26 1.431l-1.003.827c-.293.24-.438.613-.431.992a6.759 6.759 0 010 .255c-.007.378.138.75.43.99l1.005.828c.424.35.534.954.26 1.43l-1.298 2.247a1.125 1.125 0 01-1.369.491l-1.217-.456c-.355-.133-.75-.072-1.076.124a6.57 6.57 0 01-.22.128c-.331.183-.581.495-.644.869l-.213 1.28c-.09.543-.56.941-1.11.941h-2.594c-.55 0-1.02-.398-1.11-.94l-.213-1.281c-.062-.374-.312-.686-.644-.87a6.52 6.52 0 01-.22-.127c-.325-.196-.72-.257-1.076-.124l-1.217.456a1.125 1.125 0 01-1.369-.49l-1.297-2.247a1.125 1.125 0 01.26-1.431l1.004-.827c.292-.24.437-.613.43-.992a6.932 6.932 0 010-.255c.007-.378-.138-.75-.43-.99l-1.004-.828a1.125 1.125 0 01-.26-1.43l1.297-2.247a1.125 1.125 0 011.37-.491l1.216.456c.356.133.751.072 1.076-.124.072-.044.146-.087.22-.128.332-.183.582-.495.644-.869l.214-1.281z" /><path stroke-linecap="round" stroke-linejoin="round" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" /></svg>
+                    Einstellungen
+                </button>
+            </li>
+        </ul>
+
+        <div class="p-4 border-t border-base-200">
+             <button on:click={logout} class="btn btn-ghost btn-sm w-full justify-start text-error">
+                <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-5 h-5 mr-2"><path stroke-linecap="round" stroke-linejoin="round" d="M15.75 9V5.25A2.25 2.25 0 0013.5 3h-6a2.25 2.25 0 00-2.25 2.25v13.5A2.25 2.25 0 007.5 21h6a2.25 2.25 0 002.25-2.25V15m3 0l3-3m0 0l-3-3m3 3H9" /></svg>
+                Abmelden
+             </button>
+        </div>
+    </aside>
+  </div>
+</div>
+
+<style>
+    /* Sanfte Fade-In Animation für Tab-Wechsel */
+    .fade-in {
+        animation: fadeIn 0.3s ease-in-out;
+    }
+    @keyframes fadeIn {
+        from { opacity: 0; transform: translateY(5px); }
+        to { opacity: 1; transform: translateY(0); }
+    }
+</style>
diff --git a/frontend/src/components/Login.svelte b/frontend/src/components/Login.svelte
new file mode 100644
index 0000000..b3ee52d
--- /dev/null
+++ b/frontend/src/components/Login.svelte
@@ -0,0 +1,102 @@
+<script>
+  import { login } from '../lib/api';
+  import { loading } from '../lib/stores';
+  
+  let username = '';
+  let password = '';
+  let showPassword = false;
+  
+  let logoSrc = "/api/logo?t=" + Date.now();
+
+  async function handleLogin() {
+    if (!username || !password) return;
+    await login(username, password);
+  }
+</script>
+
+<div class="hero min-h-screen bg-base-200">
+  <div class="hero-content flex-col lg:flex-row-reverse">
+    
+    <div class="text-center lg:text-left ml-0 lg:ml-8 mb-4 lg:mb-0">
+      <img 
+        src={logoSrc} 
+        alt="Schul-Logo" 
+        class="w-32 h-32 mb-6 mx-auto lg:mx-0 object-contain" 
+        on:error={(e) => e.target.style.display='none'} 
+      />
+      <h1 class="text-5xl font-bold text-primary">Zeiterfassung</h1>
+      <p class="py-6 max-w-md">
+        Willkommen zurück. Bitte melden Sie sich an, um Ihre Arbeitszeiten zu erfassen.
+      </p>
+    </div>
+    
+    <div class="card shrink-0 w-full max-w-sm shadow-2xl bg-base-100">
+      <div class="card-body">
+        <div class="form-control">
+          <label class="label" for="username">
+            <span class="label-text">Benutzername</span>
+          </label>
+          <input 
+            id="username"
+            type="text" 
+            placeholder="Benutzername" 
+            class="input input-bordered" 
+            bind:value={username} 
+          />
+        </div>
+        
+        <div class="form-control">
+          <label class="label" for="password">
+            <span class="label-text">Passwort</span>
+          </label>
+          
+          <div class="relative">
+              <input 
+                id="password"
+                type={showPassword ? "text" : "password"} 
+                placeholder="••••••••" 
+                class="input input-bordered w-full pr-10" 
+                bind:value={password}
+                on:keydown={(e) => e.key === 'Enter' && handleLogin()}
+              />
+              
+              <button 
+                type="button"
+                class="absolute inset-y-0 right-0 pr-3 flex items-center text-base-content/60 hover:text-primary z-10"
+                on:click={() => showPassword = !showPassword}
+                tabindex="-1"
+              >
+                {#if showPassword}
+                    <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-5 h-5">
+                      <path stroke-linecap="round" stroke-linejoin="round" d="M3.98 8.223A10.477 10.477 0 001.934 12C3.226 16.338 7.244 19.5 12 19.5c.993 0 1.953-.138 2.863-.395M6.228 6.228A10.45 10.45 0 0112 4.5c4.756 0 8.773 3.162 10.065 7.498a10.523 10.523 0 01-4.293 5.774M6.228 6.228L3 3m3.228 3.228l3.65 3.65m7.894 7.894L21 21m-3.228-3.228l-3.65-3.65m0 0a3 3 0 10-4.243-4.243m4.242 4.242L9.88 9.88" />
+                    </svg>
+                {:else}
+                    <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-5 h-5">
+                      <path stroke-linecap="round" stroke-linejoin="round" d="M2.036 12.322a1.012 1.012 0 010-.639C3.423 7.51 7.36 4.5 12 4.5c4.638 0 8.573 3.007 9.963 7.178.07.207.07.431 0 .639C20.577 16.49 16.64 19.5 12 19.5c-4.638 0-8.573-3.007-9.963-7.178z" />
+                      <path stroke-linecap="round" stroke-linejoin="round" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
+                    </svg>
+                {/if}
+              </button>
+          </div>
+
+          <label class="label">
+            <a href="#" class="label-text-alt link link-hover">Passwort vergessen?</a>
+          </label>
+        </div>
+        
+        <div class="form-control mt-6">
+          <button 
+            class="btn btn-primary" 
+            on:click={handleLogin}
+            disabled={$loading}
+          >
+            {#if $loading}
+                <span class="loading loading-spinner"></span>
+            {/if}
+            Anmelden
+          </button>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
diff --git a/frontend/src/components/ScheduleItem.svelte b/frontend/src/components/ScheduleItem.svelte
new file mode 100644
index 0000000..ef2d898
--- /dev/null
+++ b/frontend/src/components/ScheduleItem.svelte
@@ -0,0 +1,42 @@
+<script>
+  import { createEventDispatcher } from 'svelte';
+  
+  export let schedule;
+  export let dayOfWeek;
+  export let isSelected = false;
+  export let isClickable = true;
+
+  const dispatch = createEventDispatcher();
+  
+  $: bgClass = isSelected 
+    ? "bg-success text-success-content shadow-md scale-[1.02]" 
+    : (isClickable ? "bg-base-200 hover:bg-base-300 hover:shadow-sm" : "bg-base-100 opacity-40 grayscale");
+    
+  $: cursorClass = isClickable ? "cursor-pointer" : "cursor-default";
+  
+  $: borderClass = isSelected 
+    ? "border-l-4 border-l-success-content/20" 
+    : (isClickable ? "border-l-4 border-l-transparent hover:border-l-primary" : "border-l-4 border-l-transparent");
+</script>
+
+<div 
+  class="card rounded-lg transition-all duration-200 {bgClass} {cursorClass} {borderClass}"
+  on:click={() => isClickable && dispatch('toggle')}
+  on:keydown={() => {}}
+  role="button"
+  tabindex="0"
+>
+  <div class="p-3 text-center">
+    <div class="font-mono font-bold text-sm opacity-90">
+      {schedule.startTime} - {schedule.endTime}
+    </div>
+    <div class="text-sm font-medium mt-1 truncate">
+      {schedule.title} 
+    </div>
+    {#if schedule.scheduleType === 'break'}
+        <div class="mt-1">
+            <span class="badge badge-xs badge-ghost uppercase tracking-tighter text-[10px]">Pause</span>
+        </div>
+    {/if}
+  </div>
+</div>
diff --git a/frontend/src/components/ScheduleItems.svelte b/frontend/src/components/ScheduleItems.svelte
new file mode 100644
index 0000000..11ce34d
--- /dev/null
+++ b/frontend/src/components/ScheduleItems.svelte
@@ -0,0 +1,39 @@
+<script>
+  import { createEventDispatcher } from 'svelte';
+  
+  export let schedule;
+  export let dayOfWeek;
+  export let isSelected = false;
+  export let isClickable = true;
+
+  const dispatch = createEventDispatcher();
+  
+  // Style-Logik basierend auf dem Status
+  $: boxClass = isSelected 
+    ? "box has-background-success-light" 
+    : (isClickable ? "box has-background-white" : "box has-background-light");
+    
+  $: cursorStyle = isClickable ? "pointer" : "not-allowed";
+  
+  // Opazität: Wenn nicht klickbar und nicht ausgewählt -> ausgegraut
+  $: opacity = (isClickable || isSelected) ? "1" : "0.6";
+  
+  // Rahmen: Wenn klickbar (Hover-Effekt Visualisierung) vs fest
+  $: borderStyle = (isClickable && !isSelected) ? '2px solid transparent' : '2px solid currentColor';
+</script>
+
+<div 
+  class={boxClass}
+  style="cursor: {cursorStyle}; margin-bottom: 0.5rem; padding: 0.75rem; opacity: {opacity}; transition: all 0.2s ease; border: {borderStyle}"
+  on:click={() => isClickable && dispatch('toggle')}
+  on:keydown={() => {}}
+  role="button"
+  tabindex="0"
+>
+  <p class="has-text-weight-bold is-size-7">
+    {schedule.startTime} - {schedule.endTime}
+  </p>
+  <p class="is-size-7">
+    {schedule.title} {schedule.scheduleType === 'break' ? '(Pause)' : ''}
+  </p>
+</div>
diff --git a/frontend/src/components/ToastNotification.svelte b/frontend/src/components/ToastNotification.svelte
new file mode 100644
index 0000000..c8e6f23
--- /dev/null
+++ b/frontend/src/components/ToastNotification.svelte
@@ -0,0 +1,34 @@
+<script>
+  import { toasts, removeToast } from '../lib/stores';
+  import { fly } from 'svelte/transition';
+
+  function getAlertClass(type) {
+      switch(type) {
+          case 'error': return 'alert-error';
+          case 'warning': return 'alert-warning';
+          case 'success': return 'alert-success';
+          default: return 'alert-info';
+      }
+  }
+</script>
+
+<div class="toast toast-top toast-end z-50">
+  {#each $toasts as toast (toast.id)}
+    <div 
+      class="alert {getAlertClass(toast.type)} shadow-lg min-w-[300px]"
+      transition:fly={{ y: -20, duration: 300 }}
+    >
+      {#if toast.type === 'error'}
+        <svg xmlns="http://www.w3.org/2000/svg" class="stroke-current shrink-0 h-6 w-6" fill="none" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M10 14l2-2m0 0l2-2m-2 2l-2-2m2 2l2 2m7-2a9 9 0 11-18 0 9 9 0 0118 0z" /></svg>
+      {:else if toast.type === 'success'}
+        <svg xmlns="http://www.w3.org/2000/svg" class="stroke-current shrink-0 h-6 w-6" fill="none" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" /></svg>
+      {:else}
+        <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" class="stroke-current shrink-0 w-6 h-6"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"></path></svg>
+      {/if}
+      
+      <span>{toast.message}</span>
+      
+      <button class="btn btn-sm btn-ghost" on:click={() => removeToast(toast.id)}>✕</button>
+    </div>
+  {/each}
+</div>
diff --git a/frontend/src/components/UserDashboard.svelte b/frontend/src/components/UserDashboard.svelte
new file mode 100644
index 0000000..ec4534e
--- /dev/null
+++ b/frontend/src/components/UserDashboard.svelte
@@ -0,0 +1,445 @@
+<script>
+  import { onMount } from 'svelte';
+  import { auth, addToast } from '../lib/stores';
+  import { logout, getSchedules, getMyTimeEntries, saveTimeEntriesBatch, deleteWeekEntries, changeMyPassword } from '../lib/api';
+  import { getISOWeek, getISOYear, formatDate, getDateOfISOWeek, calculateHours } from '../lib/utils';
+  import ScheduleItem from './ScheduleItem.svelte';
+
+  const today = new Date();
+  let currentISOYear = getISOYear(today);
+  let currentWeek = getISOWeek(today);
+  
+  let schedules = [];
+  let allEntries = []; 
+  let existingEntries = []; 
+  let selectedEntries = [];
+  let weekEditMode = false;
+  
+  let processing = false;      
+  let isLoadingData = true;
+  let isDrawerOpen = false;    
+
+  let showPwModal = false;
+  let pwData = { old: "", new1: "", new2: "" };
+
+  $: hasEntriesForWeek = existingEntries.some(e => e.entryType !== 'manual');
+  
+  $: weekDates = Array.from({length: 5}, (_, i) => {
+    const d = getDateOfISOWeek(currentWeek, currentISOYear);
+    d.setDate(d.getDate() + i); 
+    return { 
+      name: ['Montag', 'Dienstag', 'Mittwoch', 'Donnerstag', 'Freitag'][i],
+      date: formatDate(d),
+      dayIndex: i 
+    };
+  });
+
+  $: yearlyTotal = allEntries.reduce((sum, entry) => {
+      let hours = 0;
+      if (entry.entryType === 'lesson') hours = 1.0;
+      else hours = calculateHours(entry.startTime, entry.endTime);
+      return sum + hours;
+  }, 0);
+
+  $: userTarget = $auth.user?.yearlyWorkHours || 60;
+  $: remaining = userTarget - yearlyTotal;
+  $: progressPercent = userTarget > 0 ? Math.min(100, (yearlyTotal / userTarget) * 100) : 0;
+  $: progressClass = remaining <= 0 ? "progress-success" : (yearlyTotal >= userTarget * 0.8 ? "progress-info" : "progress-warning");
+
+  onMount(loadData);
+
+  async function handleDeleteWeek() {
+      if(!confirm("Möchten Sie wirklich alle Einträge dieser Woche löschen?")) return;
+
+      processing = true;
+      try {
+          await deleteWeekEntries(currentISOYear, currentWeek);
+          addToast("Woche erfolgreich zurückgesetzt", "success");
+          weekEditMode = false;
+          await loadData();
+      } catch (e) {
+          console.error(e);
+      } finally {
+          processing = false;
+      }
+  }
+
+  async function loadData() {
+    isLoadingData = true; 
+    try {
+        const [schedulesData, entriesData] = await Promise.all([
+          getSchedules(),
+          getMyTimeEntries()
+        ]);
+        schedules = schedulesData;
+        allEntries = entriesData; 
+        filterEntries(entriesData);
+    } finally {
+        isLoadingData = false;
+    }
+  }
+
+  function filterEntries(entries) {
+     existingEntries = entries.filter(e => {
+       const [y, m, d] = e.date.split('-').map(Number);
+       const entryDate = new Date(y, m - 1, d);
+       return getISOYear(entryDate) === currentISOYear && getISOWeek(entryDate) === currentWeek;
+     });
+     selectedEntries = existingEntries.map(e => {
+         const sched = schedules.find(s => s.id === e.scheduleId);
+         if (sched) return { scheduleId: e.scheduleId, dayOfWeek: sched.dayOfWeek };
+         return null;
+     }).filter(item => item !== null);
+  }
+
+  function toggleSelection(scheduleId, dayOfWeek) {
+    const index = selectedEntries.findIndex(e => e.scheduleId === scheduleId && e.dayOfWeek === dayOfWeek);
+    if (index >= 0) selectedEntries.splice(index, 1);
+    else selectedEntries.push({ scheduleId, dayOfWeek });
+    selectedEntries = selectedEntries;
+  }
+
+  async function saveEntries() {
+    processing = true;
+    try {
+      const entriesToSave = selectedEntries.map(sel => {
+          const sched = schedules.find(s => s.id === sel.scheduleId);
+          const dateObj = weekDates.find(d => d.dayIndex === sel.dayOfWeek);
+          return {
+              schedule_id: sel.scheduleId,
+              date: dateObj.date,
+              type: sched.scheduleType,
+              start_time: sched.startTime,
+              end_time: sched.endTime
+          };
+      });
+      if(entriesToSave.length > 0) await saveTimeEntriesBatch(entriesToSave);
+      weekEditMode = false;
+      await loadData();
+    } finally {
+      processing = false;
+    }
+  }
+
+  function changeWeek(delta) {
+    const d = getDateOfISOWeek(currentWeek, currentISOYear);
+    d.setDate(d.getDate() + (delta * 7));
+    currentWeek = getISOWeek(d);
+    currentISOYear = getISOYear(d);
+    loadData();
+  }
+  
+  function closeDrawer() { isDrawerOpen = false; }
+
+  async function handleChangePassword() {
+      if (pwData.new1 !== pwData.new2) {
+          addToast("Die neuen Passwörter stimmen nicht überein", "warning");
+          return;
+      }
+      if (pwData.new1.length < 6) {
+          addToast("Passwort zu kurz (min. 6 Zeichen)", "warning");
+          return;
+      }
+      
+      try {
+          await changeMyPassword(pwData.old, pwData.new1);
+          addToast("Passwort erfolgreich geändert!", "success");
+          showPwModal = false;
+          pwData = { old: "", new1: "", new2: "" };
+      } catch (e) {
+      }
+  }
+</script>
+
+<div class="drawer lg:drawer-open">
+  <input id="user-drawer" type="checkbox" class="drawer-toggle" bind:checked={isDrawerOpen} />
+  
+  <div class="drawer-content flex flex-col bg-base-200 min-h-screen pb-20">
+      
+      <div class="navbar bg-base-100 shadow-sm border-b border-base-200 sticky top-0 z-30 px-4 sm:px-8">
+        <div class="flex-none lg:hidden">
+            <label for="user-drawer" class="btn btn-square btn-ghost">
+                <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" class="inline-block w-6 h-6 stroke-current"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 6h16M4 12h16M4 18h16"></path></svg>
+            </label>
+        </div>
+        
+        <div class="flex-1">
+            <div class="text-sm breadcrumbs hidden sm:block">
+                <ul>
+                    <li class="opacity-50">Mein Bereich</li>
+                    <li class="font-bold text-primary">Stundenplan</li>
+                </ul>
+            </div>
+            <span class="font-bold text-lg sm:hidden">KW {currentWeek}</span>
+        </div>
+        
+        <div class="flex-none flex items-center gap-4">
+            <div class="hidden sm:block text-right leading-tight">
+                <div class="font-bold text-sm">{$auth.user?.username}</div>
+                <div class="text-xs opacity-50">Benutzer</div>
+            </div>
+            <div class="dropdown dropdown-end">
+                <div tabindex="0" role="button" class="btn btn-ghost btn-circle avatar placeholder">
+                    <div class="bg-primary text-primary-content rounded-full w-10">
+                        <span class="text-xl">{$auth.user?.username?.charAt(0).toUpperCase()}</span>
+                    </div>
+                </div>
+                <ul tabindex="0" class="menu menu-sm dropdown-content mt-3 z-[1] p-2 shadow bg-base-100 rounded-box w-52">
+                    <li><button on:click={logout} class="text-error font-bold">Abmelden</button></li>
+                </ul>
+            </div>
+        </div>
+      </div>
+
+      <div class="p-4 md:p-8 lg:p-10 fade-in space-y-6">
+
+          <div class="card bg-base-100 shadow-sm border border-base-200">
+              <div class="card-body p-2 sm:p-4 flex-row items-center justify-between">
+                  <button class="btn btn-circle btn-ghost" on:click={() => changeWeek(-1)} disabled={isLoadingData}>
+                      <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-6 h-6"><path stroke-linecap="round" stroke-linejoin="round" d="M15.75 19.5L8.25 12l7.5-7.5" /></svg>
+                  </button>
+                  <div class="text-center">
+                      <p class="text-[10px] sm:text-xs font-bold text-primary tracking-widest uppercase mb-1">Kalenderwoche</p>
+                      <h2 class="text-xl sm:text-3xl font-bold">KW {currentWeek} <span class="text-base-content/30">/</span> {currentISOYear}</h2>
+                      <p class="text-xs sm:text-sm opacity-60 mt-1 font-mono bg-base-200 inline-block px-2 py-1 rounded">{weekDates[0]?.date} — {weekDates[4]?.date}</p>
+                  </div>
+                  <button class="btn btn-circle btn-ghost" on:click={() => changeWeek(1)} disabled={isLoadingData}>
+                      <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-6 h-6"><path stroke-linecap="round" stroke-linejoin="round" d="M8.25 4.5l7.5 7.5-7.5 7.5" /></svg>
+                  </button>
+              </div>
+          </div>
+
+          <div class="lg:hidden grid grid-cols-2 gap-2">
+             <div class="stats shadow-sm bg-base-100 border border-base-200 py-1">
+                 <div class="stat p-2 text-center">
+                    <div class="stat-desc">Geleistet</div>
+                    <div class="stat-value text-lg">{yearlyTotal.toFixed(1)}</div>
+                 </div>
+             </div>
+             <div class="stats shadow-sm bg-base-100 border border-base-200 py-1">
+                 <div class="stat p-2 text-center">
+                    <div class="stat-desc">Offen</div>
+                    <div class="stat-value text-lg {remaining <= 0 ? 'text-success' : 'text-warning'}">{Math.max(0, remaining).toFixed(1)}</div>
+                 </div>
+             </div>
+          </div>
+
+          {#if isLoadingData}
+              <div class="hidden lg:block bg-base-100 rounded-2xl p-4 shadow-xl border border-base-200">
+                 <div class="flex gap-4">
+                     {#each Array(5) as _}
+                         <div class="flex-1 space-y-4">
+                             <div class="skeleton h-8 w-full mb-4"></div> 
+                             <div class="skeleton h-20 w-full rounded"></div>
+                             <div class="skeleton h-20 w-full rounded"></div>
+                         </div>
+                     {/each}
+                 </div>
+              </div>
+              <div class="lg:hidden space-y-4">
+                 {#each Array(5) as _} <div class="skeleton h-16 w-full rounded-lg"></div> {/each}
+              </div>
+
+          {:else}
+              {#if hasEntriesForWeek && !weekEditMode}
+                <div role="alert" class="alert alert-success shadow-sm">
+                    <svg xmlns="http://www.w3.org/2000/svg" class="stroke-current shrink-0 h-6 w-6" fill="none" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z" /></svg>
+                    <div><h3 class="font-bold">Erfasst!</h3><div class="text-xs">Stunden gespeichert.</div></div>
+                    <button class="btn btn-sm btn-outline" on:click={() => weekEditMode = true} disabled={processing}>Bearbeiten</button>
+                </div>
+              {:else if weekEditMode}
+                <div role="alert" class="alert alert-warning shadow-sm">
+                    <svg xmlns="http://www.w3.org/2000/svg" class="stroke-current shrink-0 h-6 w-6" fill="none" viewBox="0 0 24 24"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z" /></svg>
+                    <div><h3 class="font-bold">Bearbeitungsmodus</h3><div class="text-xs">Speichern nicht vergessen!</div></div>
+                    <div class="flex gap-2">
+                        <button class="btn btn-sm btn-error" on:click={handleDeleteWeek} disabled={processing}>Löschen</button>
+                        <button class="btn btn-sm btn-ghost" on:click={() => weekEditMode = false}>Abbrechen</button>
+                    </div>
+                </div>
+              {:else}
+                <div role="alert" class="alert alert-info shadow-sm">
+                    <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" class="stroke-current shrink-0 w-6 h-6"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M13 16h-1v-4h-1m1-4h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z"></path></svg>
+                    <div><h3 class="font-bold">Zeiterfassung</h3><div class="text-xs">Wählen Sie Ihre Stunden.</div></div>
+                </div>
+              {/if}
+
+              <div class="overflow-x-auto hidden lg:block bg-base-100 rounded-2xl shadow-xl border border-base-200">
+                  <table class="table table-fixed w-full">
+                      <thead>
+                          <tr>
+                              {#each weekDates as day}
+                                  <th class="text-center bg-base-200/50 py-4">
+                                      <div class="font-bold text-lg">{day.name}</div>
+                                      <div class="text-xs font-normal opacity-50">{day.date}</div>
+                                  </th>
+                              {/each}
+                          </tr>
+                      </thead>
+                      <tbody>
+                          <tr>
+                              {#each weekDates as day}
+                                  <td class="align-top p-2 min-w-[160px] border-r border-base-200 last:border-0">
+                                      <div class="space-y-2">
+                                          {#each schedules.filter(s => s.dayOfWeek === day.dayIndex) as schedule}
+                                              <ScheduleItem 
+                                                  {schedule} dayOfWeek={day.dayIndex}
+                                                  isSelected={selectedEntries.some(e => e.scheduleId === schedule.id && e.dayOfWeek === day.dayIndex)}
+                                                  isClickable={(!hasEntriesForWeek || weekEditMode) && !processing}
+                                                  on:toggle={() => toggleSelection(schedule.id, day.dayIndex)}
+                                              />
+                                          {/each}
+                                      </div>
+                                  </td>
+                              {/each}
+                          </tr>
+                      </tbody>
+                  </table>
+              </div>
+
+              <div class="lg:hidden space-y-4">
+                  {#each weekDates as day}
+                      <div class="collapse collapse-arrow bg-base-100 shadow-md border border-base-200">
+                          <input type="checkbox" /> 
+                          <div class="collapse-title text-lg font-medium flex justify-between items-center">
+                              <span>{day.name}</span>
+                              <span class="text-sm opacity-50 font-mono">{day.date}</span>
+                          </div>
+                          <div class="collapse-content">
+                              <div class="pt-2 space-y-2">
+                                  {#each schedules.filter(s => s.dayOfWeek === day.dayIndex) as schedule}
+                                      <ScheduleItem 
+                                          {schedule} dayOfWeek={day.dayIndex}
+                                          isSelected={selectedEntries.some(e => e.scheduleId === schedule.id && e.dayOfWeek === day.dayIndex)}
+                                          isClickable={(!hasEntriesForWeek || weekEditMode) && !processing}
+                                          on:toggle={() => toggleSelection(schedule.id, day.dayIndex)}
+                                      />
+                                  {/each}
+                              </div>
+                          </div>
+                      </div>
+                  {/each}
+              </div>
+          {/if}
+
+      </div>
+      
+      {#if (!hasEntriesForWeek || weekEditMode) && !isLoadingData}
+          <div class="sticky bottom-6 z-20 px-4 md:px-8 lg:px-10 pointer-events-none">
+              <button 
+                  class="btn btn-primary btn-lg w-full shadow-2xl border-primary-focus transform active:scale-[0.99] transition-transform pointer-events-auto"
+                  disabled={selectedEntries.length === 0 || processing}
+                  on:click={saveEntries}
+              >
+                  {#if processing}<span class="loading loading-spinner"></span>{/if}
+                  {weekEditMode ? 'Änderungen speichern' : 'Speichern'}
+              </button>
+          </div>
+      {/if}
+
+  </div>
+  
+  <div class="drawer-side z-40">
+    <label for="user-drawer" class="drawer-overlay"></label> 
+    
+
+    <aside class="bg-base-100 w-80 h-full flex flex-col border-r border-base-300">
+        <div class="p-6 border-b border-base-200">
+            <div class="flex items-center gap-3">
+                <div class="w-10 h-10 flex items-center justify-center">
+                    <img 
+                        src="/api/logo?t={Date.now()}" 
+                        alt="Logo" 
+                        class="w-full h-full object-contain"
+                        on:error={(e) => { 
+                            e.target.style.display='none'; 
+                            e.target.nextElementSibling.style.display='flex';
+                        }} 
+                    />
+                    <div class="hidden w-10 h-10 rounded bg-primary text-primary-content font-bold text-xl items-center justify-center">
+                        Z
+                    </div>
+                </div>
+                <div class="font-bold text-xl tracking-tight">Zeiterfassung</div>
+            </div>
+            <div class="text-xs font-mono opacity-50 mt-1 pl-14">User Dashboard</div>
+        </div>
+        <ul class="menu p-4 w-full gap-2 text-base font-medium">
+            <li class="menu-title opacity-50 uppercase text-xs font-bold tracking-wider mt-2 mb-1">Navigation</li>
+            <li>
+                <a class="active bg-primary/10 text-primary" href="#" on:click={() => closeDrawer()}>
+                    <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-5 h-5"><path stroke-linecap="round" stroke-linejoin="round" d="M6.75 3v2.25M17.25 3v2.25M3 18.75V7.5a2.25 2.25 0 012.25-2.25h13.5A2.25 2.25 0 0121 7.5v11.25m-18 0A2.25 2.25 0 005.25 21h13.5A2.25 2.25 0 0021 18.75m-18 0v-7.5A2.25 2.25 0 015.25 9h13.5A2.25 2.25 0 0121 11.25v7.5" /></svg>
+                    Stundenplan
+                </a>
+            </li>
+            <li>
+                <button on:click={() => showPwModal = true}>
+                    <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-5 h-5"><path stroke-linecap="round" stroke-linejoin="round" d="M16.5 10.5V6.75a4.5 4.5 0 10-9 0v3.75m-.75 11.25h10.5a2.25 2.25 0 002.25-2.25v-6.75a2.25 2.25 0 00-2.25-2.25H6.75a2.25 2.25 0 00-2.25 2.25v6.75a2.25 2.25 0 002.25 2.25z" /></svg>
+                    Passwort ändern
+                </button>
+            </li>
+        </ul>
+
+        <div class="mt-auto p-4 bg-base-200 m-4 rounded-xl space-y-4">
+             <div class="text-xs font-bold uppercase opacity-50 tracking-wider">Jahresfortschritt</div>
+             
+             <div class="flex justify-between items-end">
+                 <div>
+                     <div class="text-3xl font-bold text-primary">{yearlyTotal.toFixed(1)}</div>
+                     <div class="text-xs opacity-70">von {userTarget.toFixed(1)} Stunden</div>
+                 </div>
+                 <div class="radial-progress text-primary text-xs font-bold" style="--value:{progressPercent}; --size:3rem;">
+                    {Math.round(progressPercent)}%
+                 </div>
+             </div>
+
+             <div class="divider my-1"></div>
+
+             <div class="flex justify-between text-sm">
+                 <span class="opacity-70">Verbleibend:</span>
+                 <span class="font-bold {remaining <= 0 ? 'text-success' : 'text-warning'}">
+                     {Math.max(0, remaining).toFixed(1)} h
+                 </span>
+             </div>
+             
+             <progress class="progress w-full h-2 {progressClass}" value={progressPercent} max="100"></progress>
+        </div>
+
+        <div class="p-4 border-t border-base-200">
+             <button on:click={logout} class="btn btn-ghost btn-sm w-full justify-start text-error">
+                <svg xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor" class="w-5 h-5 mr-2"><path stroke-linecap="round" stroke-linejoin="round" d="M15.75 9V5.25A2.25 2.25 0 0013.5 3h-6a2.25 2.25 0 00-2.25 2.25v13.5A2.25 2.25 0 007.5 21h6a2.25 2.25 0 002.25-2.25V15m3 0l3-3m0 0l-3-3m3 3H9" /></svg>
+                Abmelden
+             </button>
+        </div>
+    </aside>
+  </div>
+</div>
+
+<dialog class="modal {showPwModal ? 'modal-open' : ''}">
+  <div class="modal-box">
+    <h3 class="font-bold text-lg mb-4">Passwort ändern</h3>
+    
+    <div class="space-y-4">
+        <div class="form-control">
+            <label class="label">Altes Passwort</label>
+            <input type="password" class="input input-bordered" bind:value={pwData.old} />
+        </div>
+        <div class="form-control">
+            <label class="label">Neues Passwort</label>
+            <input type="password" class="input input-bordered" bind:value={pwData.new1} />
+        </div>
+        <div class="form-control">
+            <label class="label">Wiederholung</label>
+            <input type="password" class="input input-bordered" bind:value={pwData.new2} />
+        </div>
+    </div>
+
+    <div class="modal-action">
+      <button class="btn" on:click={() => showPwModal = false}>Abbrechen</button>
+      <button class="btn btn-primary" on:click={handleChangePassword} disabled={!pwData.old || !pwData.new1}>Speichern</button>
+    </div>
+  </div>
+</dialog>
+<style>
+    .fade-in { animation: fadeIn 0.3s ease-in-out; }
+    @keyframes fadeIn { from { opacity: 0; transform: translateY(5px); } to { opacity: 1; transform: translateY(0); } }
+</style>
diff --git a/frontend/src/components/admin/AdminScheduleTab.svelte b/frontend/src/components/admin/AdminScheduleTab.svelte
new file mode 100644
index 0000000..323eb83
--- /dev/null
+++ b/frontend/src/components/admin/AdminScheduleTab.svelte
@@ -0,0 +1,253 @@
+<script>
+  import { onMount } from 'svelte';
+  import { getSchedules, createSchedule, deleteSchedule } from '../../lib/api';
+  import { loading, addToast } from '../../lib/stores';
+
+  let schedules = [];
+  let fileInput;
+  
+  let newSchedule = {
+    dayOfWeek: "", 
+    startTime: "",
+    endTime: "",
+    scheduleType: "lesson",
+    title: ""
+  };
+
+  const dayNames = ["Montag", "Dienstag", "Mittwoch", "Donnerstag", "Freitag"];
+
+  let showCopyModal = false;
+  let copySourceDay = "";
+  let copyTargetDays = []; 
+  let deleteExisting = true;
+  let copyProcessing = false;
+  let importProcessing = false;
+
+  onMount(loadSchedules);
+
+  async function loadSchedules() {
+    schedules = await getSchedules();
+  }
+
+  function isValidTimeRange(start, end) {
+      if (!start || !end) return false;
+      const [h1, m1] = start.split(':').map(Number);
+      const [h2, m2] = end.split(':').map(Number);
+      return (h2 * 60 + m2) > (h1 * 60 + m1);
+  }
+
+  async function handleCreate() {
+    if (newSchedule.dayOfWeek === "" || !newSchedule.startTime || !newSchedule.endTime) {
+        addToast("Bitte alle Felder ausfüllen", "warning");
+        return;
+    }
+    if (!isValidTimeRange(newSchedule.startTime, newSchedule.endTime)) {
+        addToast("Endzeit muss nach Startzeit liegen", "error");
+        return;
+    }
+
+    try {
+        await createSchedule(newSchedule);
+        newSchedule = { dayOfWeek: "", startTime: "", endTime: "", scheduleType: "lesson", title: "" };
+        await loadSchedules();
+        addToast("Eintrag erstellt", "success");
+    } catch (e) {}
+  }
+
+  async function handleDelete(id) {
+    if(confirm('Wirklich löschen?')) {
+        await deleteSchedule(id);
+        await loadSchedules();
+        addToast("Gelöscht", "success");
+    }
+  }
+
+  function handleExport() {
+      if (schedules.length === 0) return addToast("Keine Daten", "warning");
+      const exportData = schedules.map(s => ({ ...s, id: undefined })); 
+      const dataStr = "data:text/json;charset=utf-8," + encodeURIComponent(JSON.stringify(exportData, null, 2));
+      const a = document.createElement('a'); a.href = dataStr; a.download = "stundenplan_export.json"; a.click();
+  }
+
+  function triggerImport() { fileInput.click(); }
+
+  async function handleFileSelect(event) {
+      const file = event.target.files[0];
+      if (!file) return;
+      event.target.value = '';
+      if (!confirm("Import starten? Duplikate möglich.")) return;
+
+      const reader = new FileReader();
+      reader.onload = async (e) => {
+          try {
+              const importedData = JSON.parse(e.target.result);
+              importProcessing = true;
+              addToast(`Importiere ${importedData.length}...`, "info");
+              let count = 0; let errors = 0;
+              for (const item of importedData) {
+                  if (item.dayOfWeek !== undefined && isValidTimeRange(item.startTime, item.endTime)) {
+                      await createSchedule({
+                          dayOfWeek: String(item.dayOfWeek),
+                          startTime: item.startTime,
+                          endTime: item.endTime,
+                          scheduleType: item.scheduleType || 'lesson',
+                          title: item.title || ''
+                      });
+                      count++;
+                  } else errors++;
+              }
+              await loadSchedules();
+              errors > 0 ? addToast(`${count} importiert, ${errors} ungültig`, "warning") : addToast("Import erfolgreich", "success");
+          } catch (err) { addToast(err.message, "error"); } 
+          finally { importProcessing = false; }
+      };
+      reader.readAsText(file);
+  }
+
+  function toggleTargetDay(dayIndex) {
+    const sIndex = String(dayIndex);
+    copyTargetDays = copyTargetDays.includes(sIndex) ? copyTargetDays.filter(d => d !== sIndex) : [...copyTargetDays, sIndex];
+  }
+
+  async function handleCopyDay() {
+     if (copySourceDay === "" || copyTargetDays.length === 0) return;
+     copyProcessing = true;
+     try {
+         const sourceEntries = schedules.filter(s => String(s.dayOfWeek) === copySourceDay);
+         if (sourceEntries.length === 0) throw new Error("Keine Quelleinträge");
+
+         if (deleteExisting) {
+             const toDel = schedules.filter(s => copyTargetDays.includes(String(s.dayOfWeek)));
+             for (const s of toDel) await deleteSchedule(s.id);
+         }
+         for (const targetDay of copyTargetDays) {
+             for (const entry of sourceEntries) {
+                 if(isValidTimeRange(entry.startTime, entry.endTime)) {
+                    await createSchedule({ ...entry, dayOfWeek: targetDay, id: undefined });
+                 }
+             }
+         }
+         addToast("Kopieren erfolgreich", "success");
+         showCopyModal = false; copyTargetDays = []; copySourceDay = ""; await loadSchedules();
+     } catch (e) { addToast(e.message, "error"); }
+     finally { copyProcessing = false; }
+  }
+</script>
+
+<div class="flex justify-between items-center mb-6">
+    <div class="join">
+        <input type="file" accept=".json" class="hidden" bind:this={fileInput} on:change={handleFileSelect} />
+        <button class="btn btn-sm join-item" on:click={handleExport} disabled={schedules.length === 0}><i class="fas fa-download mr-2"></i> Export</button>
+        <button class="btn btn-sm join-item" on:click={triggerImport} disabled={importProcessing}><i class="fas fa-upload mr-2"></i> Import</button>
+        <button class="btn btn-sm btn-info join-item" on:click={() => showCopyModal = true}><i class="fas fa-copy mr-2"></i> Tag kopieren</button>
+    </div>
+</div>
+
+<div class="card bg-base-100 shadow-xl mb-8">
+  <div class="card-body">
+    <h3 class="card-title text-sm opacity-60 uppercase mb-2">Neuen Eintrag erstellen</h3>
+    
+    <div class="grid grid-cols-1 md:grid-cols-3 gap-4">
+        <div class="form-control w-full">
+            <label class="label"><span class="label-text font-bold">Wochentag</span></label>
+            <select class="select select-bordered w-full" bind:value={newSchedule.dayOfWeek}>
+                <option value="">-- Wählen --</option>
+                {#each dayNames as day, i} <option value={String(i)}>{day}</option> {/each}
+            </select>
+        </div>
+
+        <div class="form-control w-full">
+            <label class="label"><span class="label-text font-bold">Startzeit</span></label>
+            <input type="time" class="input input-bordered w-full" bind:value={newSchedule.startTime} />
+        </div>
+
+        <div class="form-control w-full">
+            <label class="label"><span class="label-text font-bold">Endzeit</span></label>
+            <input type="time" class="input input-bordered w-full" bind:value={newSchedule.endTime} />
+        </div>
+
+        <div class="form-control w-full">
+            <label class="label"><span class="label-text font-bold">Typ</span></label>
+            <select class="select select-bordered w-full" bind:value={newSchedule.scheduleType}>
+                <option value="lesson">Unterricht</option>
+                <option value="break">Pause</option>
+            </select>
+        </div>
+
+        <div class="form-control w-full md:col-span-2">
+            <label class="label"><span class="label-text font-bold">Titel / Fach</span></label>
+            <input type="text" class="input input-bordered w-full" placeholder="z.B. Mathematik" bind:value={newSchedule.title} />
+        </div>
+    </div>
+
+    <div class="card-actions justify-end mt-6">
+        <button class="btn btn-primary px-8" on:click={handleCreate} disabled={!newSchedule.dayOfWeek || $loading}>
+            {#if $loading}<span class="loading loading-spinner"></span>{/if}
+            Hinzufügen
+        </button>
+    </div>
+  </div>
+</div>
+
+<div class="overflow-x-auto bg-base-100 rounded-lg shadow-xl border border-base-200">
+    <table class="table table-zebra w-full">
+        <thead><tr><th>Tag</th><th>Zeit</th><th>Typ</th><th>Titel</th><th>Aktion</th></tr></thead>
+        <tbody>
+            {#each schedules as s (s.id)}
+                <tr>
+                    <td class="font-bold">{dayNames[s.dayOfWeek]}</td>
+                    <td>{s.startTime} - {s.endTime}</td>
+                    <td><span class="badge {s.scheduleType === 'break' ? 'badge-ghost' : 'badge-primary'}">{s.scheduleType === 'break' ? 'Pause' : 'Unterricht'}</span></td>
+                    <td>{s.title}</td>
+                    <td><button class="btn btn-xs btn-error btn-outline" on:click={() => handleDelete(s.id)}>Löschen</button></td>
+                </tr>
+            {/each}
+        </tbody>
+    </table>
+</div>
+
+<dialog class="modal {showCopyModal ? 'modal-open' : ''}">
+  <div class="modal-box">
+    <h3 class="font-bold text-lg mb-4">Tag kopieren</h3>
+    
+    <div class="space-y-4">
+        <div class="form-control w-full">
+            <label class="label"><span class="label-text">Quelle</span></label>
+            <select class="select select-bordered w-full" bind:value={copySourceDay}>
+                <option value="">Wählen...</option>
+                {#each dayNames as day, i} <option value={String(i)}>{day}</option> {/each}
+            </select>
+        </div>
+
+        <div class="form-control w-full">
+            <label class="label"><span class="label-text">Ziel-Tage</span></label>
+            <div class="flex flex-wrap gap-2">
+                {#each dayNames as day, i}
+                    {#if String(i) !== copySourceDay}
+                        <label class="cursor-pointer label border rounded-lg px-3 py-2 hover:bg-base-200 transition-colors">
+                            <input type="checkbox" class="checkbox checkbox-sm checkbox-primary mr-3" 
+                                checked={copyTargetDays.includes(String(i))} 
+                                on:change={() => toggleTargetDay(i)} />
+                            <span class="label-text font-medium">{day}</span>
+                        </label>
+                    {/if}
+                {/each}
+            </div>
+        </div>
+
+        <div class="form-control bg-base-200 p-3 rounded-lg mt-4">
+            <label class="label cursor-pointer justify-start gap-4">
+                <input type="checkbox" class="toggle toggle-error" bind:checked={deleteExisting} />
+                <span class="label-text">Vorhandene Einträge am Ziel vorher löschen</span>
+            </label>
+        </div>
+    </div>
+
+    <div class="modal-action">
+      <button class="btn" on:click={() => showCopyModal = false} disabled={copyProcessing}>Abbrechen</button>
+      <button class="btn btn-success" on:click={handleCopyDay} disabled={!copySourceDay || copyTargetDays.length === 0 || copyProcessing}>
+        {copyProcessing ? 'Kopiere...' : 'Kopieren starten'}
+      </button>
+    </div>
+  </div>
+</dialog>
diff --git a/frontend/src/components/admin/AdminSchoolYearsTab.svelte b/frontend/src/components/admin/AdminSchoolYearsTab.svelte
new file mode 100644
index 0000000..fe0039a
--- /dev/null
+++ b/frontend/src/components/admin/AdminSchoolYearsTab.svelte
@@ -0,0 +1,86 @@
+<script>
+  import { onMount } from 'svelte';
+  import { getSchoolYears, getActiveSchoolYear, createSchoolYear, activateSchoolYear, deleteSchoolYear } from '../../lib/api';
+  import { loading } from '../../lib/stores';
+
+  let schoolYears = [];
+  let activeSchoolYear = null;
+  let newYear = { name: "", startDate: "", endDate: "" };
+
+  onMount(loadData);
+
+  async function loadData() {
+    const [years, active] = await Promise.all([ getSchoolYears(), getActiveSchoolYear().catch(() => null) ]);
+    schoolYears = years;
+    activeSchoolYear = active;
+  }
+
+  async function handleCreate() {
+    await createSchoolYear(newYear);
+    newYear = { name: "", startDate: "", endDate: "" };
+    await loadData();
+  }
+  async function handleActivate(id) { await activateSchoolYear(id); await loadData(); }
+  async function handleDelete(id) { if(confirm('Löschen?')) { await deleteSchoolYear(id); await loadData(); } }
+</script>
+
+{#if activeSchoolYear}
+    <div class="alert alert-info shadow-lg mb-6">
+        <i class="fas fa-calendar-check"></i>
+        <div>
+            <h3 class="font-bold">Aktives Schuljahr: {activeSchoolYear.name}</h3>
+            <div class="text-xs">{activeSchoolYear.startDate} bis {activeSchoolYear.endDate}</div>
+        </div>
+    </div>
+{:else}
+    <div class="alert alert-warning shadow-lg mb-6">
+        <i class="fas fa-exclamation-triangle"></i>
+        <span>Kein Schuljahr aktiv! Bitte eines aktivieren.</span>
+    </div>
+{/if}
+
+<div class="card bg-base-100 shadow-xl mb-8">
+    <div class="card-body grid grid-cols-1 md:grid-cols-4 gap-4 items-end">
+        <div class="form-control w-full">
+            <label class="label">Name</label>
+            <input type="text" class="input input-bordered" placeholder="2024/2025" bind:value={newYear.name} />
+        </div>
+        <div class="form-control w-full">
+            <label class="label">Start</label>
+            <input type="date" class="input input-bordered" bind:value={newYear.startDate} />
+        </div>
+        <div class="form-control w-full">
+            <label class="label">Ende</label>
+            <input type="date" class="input input-bordered" bind:value={newYear.endDate} />
+        </div>
+        <button class="btn btn-primary" on:click={handleCreate} disabled={$loading}>Erstellen</button>
+    </div>
+</div>
+
+<div class="overflow-x-auto bg-base-100 rounded-lg shadow-xl">
+    <table class="table table-zebra w-full">
+        <thead><tr><th>Name</th><th>Start</th><th>Ende</th><th>Status</th><th>Aktion</th></tr></thead>
+        <tbody>
+            {#each schoolYears as sy}
+                <tr>
+                    <td class="font-bold">{sy.name}</td>
+                    <td>{sy.startDate}</td>
+                    <td>{sy.endDate}</td>
+                    <td>
+                        {#if sy.isActive}
+                            <span class="badge badge-success">Aktiv</span>
+                        {:else}
+                            <span class="badge badge-ghost">Inaktiv</span>
+                        {/if}
+                    </td>
+                    <td>
+                        {#if !sy.isActive}
+                            <button class="btn btn-xs btn-info" on:click={() => handleActivate(sy.id)}>Aktivieren</button>
+                        {/if}
+                        <button class="btn btn-xs btn-error btn-outline ml-2" on:click={() => handleDelete(sy.id)}>Löschen</button>
+                    </td>
+                </tr>
+            {/each}
+        </tbody>
+    </table>
+</div>
diff --git a/frontend/src/components/admin/AdminSettingsTab.svelte b/frontend/src/components/admin/AdminSettingsTab.svelte
new file mode 100644
index 0000000..8d05bb1
--- /dev/null
+++ b/frontend/src/components/admin/AdminSettingsTab.svelte
@@ -0,0 +1,68 @@
+<script>
+  import { uploadLogo } from '../../lib/api';
+  import { addToast } from '../../lib/stores';
+
+  let fileInput;
+  let previewSrc = "/api/logo?t=" + Date.now();
+  let uploading = false;
+
+  async function handleFileChange(e) {
+      const file = e.target.files[0];
+      if (!file) return;
+
+      if (!file.type.startsWith('image/')) {
+          addToast("Bitte nur Bilder hochladen", "warning");
+          return;
+      }
+
+      uploading = true;
+      try {
+          await uploadLogo(file);
+          addToast("Logo aktualisiert", "success");
+          const timestamp = Date.now();
+          previewSrc = `/api/logo?t=${timestamp}`;
+          
+          window.dispatchEvent(new Event('logo-updated'));
+      } catch (err) {
+          addToast(err.message, "error");
+      } finally {
+          uploading = false;
+      }
+  }
+</script>
+
+<div class="card bg-base-100 shadow-xl border border-base-200 max-w-2xl">
+    <div class="card-body">
+        <h3 class="card-title text-lg mb-4">Schuleinstellungen</h3>
+
+        <div class="form-control w-full">
+            <label class="label">
+                <span class="label-text font-bold">Schul-Logo</span>
+                <span class="label-text-alt">Wird im Login und Dashboard angezeigt</span>
+            </label>
+            
+            <div class="flex items-center gap-6 mt-2">
+                <div class="avatar placeholder border border-base-300 rounded-lg p-1 bg-base-200">
+                    <div class="w-24 h-24 rounded-lg">
+                        <img src={previewSrc} alt="Logo" on:error={(e) => e.target.style.display='none'} />
+                    </div>
+                </div>
+
+                <div>
+                    <input 
+                        type="file" 
+                        accept="image/png, image/jpeg" 
+                        class="file-input file-input-bordered file-input-primary w-full max-w-xs" 
+                        bind:this={fileInput}
+                        on:change={handleFileChange}
+                        disabled={uploading}
+                    />
+                    <div class="text-xs text-base-content/50 mt-2">
+                        Empfohlen: PNG mit transparentem Hintergrund.<br>
+                        Max. 2MB.
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+</div>
diff --git a/frontend/src/components/admin/AdminTimeEntriesTab.svelte b/frontend/src/components/admin/AdminTimeEntriesTab.svelte
new file mode 100644
index 0000000..e6d3a6a
--- /dev/null
+++ b/frontend/src/components/admin/AdminTimeEntriesTab.svelte
@@ -0,0 +1,157 @@
+<script>
+  import { onMount } from 'svelte';
+  import { getAllTimeEntries, getUsers, createAdminTimeEntry, updateTimeEntry, deleteTimeEntry, getYearlySummary, downloadYearlySummaryPDF } from '../../lib/api';
+  import { calculateHours } from '../../lib/utils';
+  import { loading, addToast } from '../../lib/stores';
+
+  let timeEntries = [];
+  let users = [];
+  let yearlySummary = [];
+  let manualEntry = { selectedUserId: "", date: "", hours: "", type: "manual" };
+  let editingEntryId = null;
+  let editForm = {};
+
+  onMount(async () => {
+    await Promise.all([loadEntries(), loadUsers(), loadSummary()]);
+  });
+  async function loadEntries() { timeEntries = await getAllTimeEntries(); }
+  async function loadUsers() { users = await getUsers(); }
+  async function loadSummary() { yearlySummary = await getYearlySummary(); }
+
+  async function handleManualEntry() {
+    if(!manualEntry.selectedUserId || !manualEntry.date || !manualEntry.hours) {
+        addToast("Bitte alle Felder ausfüllen", "warning"); return;
+    }
+    await createAdminTimeEntry({ ...manualEntry, hours: parseFloat(manualEntry.hours) });
+    manualEntry.hours = "";
+    await loadEntries(); await loadSummary();
+    addToast("Gebucht", "success");
+  }
+
+  async function handlePdfDownload() {
+      try {
+        const blob = await downloadYearlySummaryPDF();
+        const url = window.URL.createObjectURL(blob);
+        const a = document.createElement('a'); a.href = url; a.download = `Jahresuebersicht-${new Date().getFullYear()}.pdf`;
+        document.body.appendChild(a); a.click(); document.body.removeChild(a);
+      } catch (e) { addToast("PDF Fehler", "error"); }
+  }
+  
+  function startEdit(entry) { editingEntryId = entry.id; editForm = { ...entry }; }
+  async function saveEdit() { await updateTimeEntry(editingEntryId, editForm); editingEntryId = null; await loadEntries(); loadSummary(); }
+  async function deleteEntry(id) { if(confirm('Löschen?')) { await deleteTimeEntry(id); await loadEntries(); loadSummary(); } }
+</script>
+
+<div class="flex flex-col sm:flex-row justify-between items-start sm:items-center mb-6 gap-4">
+    <button class="btn btn-primary w-full sm:w-auto" on:click={handlePdfDownload} disabled={$loading}>
+        <i class="fas fa-file-pdf mr-2"></i> PDF Bericht
+    </button>
+</div>
+
+<div class="card bg-base-100 shadow-xl mb-8 border border-base-200">
+    <div class="card-body p-4 sm:p-6">
+        <h3 class="card-title text-sm opacity-60 uppercase mb-4">Jahresübersicht</h3>
+        <div class="overflow-x-auto">
+            <table class="table table-zebra w-full whitespace-nowrap">
+                <thead><tr><th>Mitarbeiter</th><th class="text-right">Soll</th><th class="text-right">Ist</th><th class="text-right">Differenz</th><th>Status</th></tr></thead>
+                <tbody>
+                    {#each yearlySummary as s}
+                        <tr>
+                            <td class="font-bold">{s.username}</td>
+                            <td class="text-right">{s.yearlyTarget}</td>
+                            <td class="text-right">{s.yearlyActual}</td>
+                            <td class="text-right font-mono {s.remainingYearly > 0 ? 'text-warning' : 'text-success'}">{s.remainingYearly.toFixed(1)}</td>
+                            <td>
+                                {#if s.remainingYearly > 0}
+                                    <span class="badge badge-warning badge-sm">Offen</span>
+                                {:else}
+                                    <span class="badge badge-success badge-sm">Erfüllt</span>
+                                {/if}
+                            </td>
+                        </tr>
+                    {/each}
+                </tbody>
+            </table>
+        </div>
+    </div>
+</div>
+
+<div class="card bg-base-200 shadow-lg mb-8">
+    <div class="card-body p-4 sm:p-6">
+        <h3 class="card-title text-sm uppercase opacity-70">Manuelle Korrektur / Eintragung</h3>
+        <div class="grid grid-cols-1 sm:grid-cols-2 md:grid-cols-4 gap-4 items-end">
+            <div class="form-control">
+                <label class="label"><span class="label-text">Mitarbeiter</span></label>
+                <select class="select select-bordered w-full" bind:value={manualEntry.selectedUserId}>
+                    <option value="">Wählen...</option>
+                    {#each users as u} <option value={u.id}>{u.username}</option> {/each}
+                </select>
+            </div>
+            <div class="form-control">
+                <label class="label"><span class="label-text">Datum</span></label>
+                <input type="date" class="input input-bordered w-full" bind:value={manualEntry.date}>
+            </div>
+            <div class="form-control">
+                <label class="label"><span class="label-text">Stunden (+/-)</span></label>
+                <input type="number" step="0.5" class="input input-bordered w-full" bind:value={manualEntry.hours} placeholder="-1.5 od. 2.0">
+            </div>
+            <button class="btn btn-info w-full" on:click={handleManualEntry} disabled={!manualEntry.selectedUserId || $loading}>
+                Buchen
+            </button>
+        </div>
+    </div>
+</div>
+
+<div class="overflow-x-auto bg-base-100 rounded-lg shadow-xl border border-base-200">
+    <table class="table table-zebra w-full whitespace-nowrap">
+        <thead><tr><th>User</th><th>Datum</th><th>Zeit</th><th>Typ</th><th>Stunden</th><th>Aktion</th></tr></thead>
+        <tbody>
+            {#each timeEntries as entry (entry.id)}
+                {#if editingEntryId === entry.id}
+                    <tr class="bg-base-200">
+                        <td>{entry.username}</td>
+                        <td><input type="date" class="input input-xs input-bordered w-24" bind:value={editForm.date}></td>
+                        <td>
+                            <div class="flex flex-col gap-1">
+                                <input type="time" class="input input-xs input-bordered" bind:value={editForm.startTime}>
+                                <input type="time" class="input input-xs input-bordered" bind:value={editForm.endTime}>
+                            </div>
+                        </td>
+                        <td>
+                            <select class="select select-bordered select-xs w-20" bind:value={editForm.entryType}>
+                                <option value="lesson">Unt.</option>
+                                <option value="break">Pause</option>
+                                <option value="manual">Man.</option>
+                            </select>
+                        </td>
+                        <td>-</td>
+                        <td>
+                            <div class="join">
+                                <button class="btn btn-xs btn-success join-item" on:click={saveEdit}><i class="fas fa-check"></i></button>
+                                <button class="btn btn-xs btn-ghost join-item" on:click={() => editingEntryId = null}><i class="fas fa-times"></i></button>
+                            </div>
+                        </td>
+                    </tr>
+                {:else}
+                    <tr>
+                        <td class="font-bold">{entry.username}</td>
+                        <td>{entry.date}</td>
+                        <td>{entry.startTime} - {entry.endTime}</td>
+                        <td>
+                            <span class="badge badge-sm {entry.entryType==='manual'?'badge-info':'badge-ghost'}">
+                                {entry.entryType}
+                            </span>
+                        </td>
+                        <td class="font-mono font-bold">{entry.entryType === 'lesson' ? '1.0' : calculateHours(entry.startTime, entry.endTime)}</td>
+                        <td>
+                            <div class="join">
+                                <button class="btn btn-xs btn-ghost join-item" on:click={() => startEdit(entry)}>Edit</button>
+                                <button class="btn btn-xs btn-ghost text-error join-item" on:click={() => deleteEntry(entry.id)}>Del</button>
+                            </div>
+                        </td>
+                    </tr>
+                {/if}
+            {/each}
+        </tbody>
+    </table>
+</div>
diff --git a/frontend/src/components/admin/AdminUsersTab.svelte b/frontend/src/components/admin/AdminUsersTab.svelte
new file mode 100644
index 0000000..338d5a9
--- /dev/null
+++ b/frontend/src/components/admin/AdminUsersTab.svelte
@@ -0,0 +1,120 @@
+<script>
+  import { onMount } from 'svelte';
+  import { getUsers, createUser, deleteUser, updateUserWorkHours, resetUserPassword } from '../../lib/api';
+  import { loading, addToast } from '../../lib/stores';
+
+  let users = [];
+  let newUser = { username: "", password: "", isAdmin: false };
+  let editingUserId = null;
+  let editingWorkHours = "";
+  let resetPasswordUserId = null;
+  let resetPasswordNew = "";
+
+  onMount(async () => users = await getUsers());
+
+  async function handleCreate() {
+    if(!newUser.username || !newUser.password) {
+        addToast("Benutzername und Passwort pflicht", "warning"); return;
+    }
+    await createUser(newUser);
+    newUser = { username: "", password: "", isAdmin: false };
+    users = await getUsers();
+    addToast("User angelegt", "success");
+  }
+
+  async function handleDelete(id) {
+    if(confirm('Löschen?')) {
+        await deleteUser(id); users = await getUsers(); addToast("Gelöscht", "success");
+    }
+  }
+
+  function startEditHours(user) {
+    editingUserId = user.id; editingWorkHours = String(user.yearlyWorkHours); resetPasswordUserId = null;
+  }
+  async function saveWorkHours() {
+    if (editingUserId) {
+        await updateUserWorkHours(editingUserId, editingWorkHours);
+        editingUserId = null; users = await getUsers(); addToast("Gespeichert", "success");
+    }
+  }
+
+  function startResetPassword(user) {
+    resetPasswordUserId = user.id; resetPasswordNew = ""; editingUserId = null;
+  }
+  async function savePassword() {
+    if (resetPasswordUserId && resetPasswordNew) {
+        await resetUserPassword(resetPasswordUserId, resetPasswordNew);
+        resetPasswordUserId = null; addToast("Passwort geändert", "success");
+    }
+  }
+</script>
+
+<div class="card bg-base-100 shadow-xl mb-8 border border-base-200">
+    <div class="card-body p-4 sm:p-6">
+        <h3 class="card-title text-sm opacity-60 uppercase mb-2">Neuen Benutzer anlegen</h3>
+        <div class="grid grid-cols-1 sm:grid-cols-2 md:grid-cols-4 gap-4 items-end">
+            <div class="form-control w-full">
+                <label class="label"><span class="label-text">Benutzername</span></label>
+                <input type="text" class="input input-bordered w-full" bind:value={newUser.username} />
+            </div>
+            <div class="form-control w-full">
+                <label class="label"><span class="label-text">Passwort</span></label>
+                <input type="password" class="input input-bordered w-full" bind:value={newUser.password} />
+            </div>
+            <div class="form-control">
+                <label class="label cursor-pointer justify-start gap-4 h-full items-center">
+                    <span class="label-text">Admin-Rechte</span>
+                    <input type="checkbox" class="checkbox" bind:checked={newUser.isAdmin} />
+                </label>
+            </div>
+            <button class="btn btn-primary w-full" on:click={handleCreate} disabled={$loading}>Anlegen</button>
+        </div>
+    </div>
+</div>
+
+<div class="overflow-x-auto bg-base-100 rounded-lg shadow-xl border border-base-200">
+    <table class="table table-zebra w-full whitespace-nowrap">
+        <thead>
+            <tr><th>ID</th><th>Name</th><th>Rolle</th><th>Jahresstunden</th><th>Aktionen</th></tr>
+        </thead>
+        <tbody>
+            {#each users as user (user.id)}
+                <tr>
+                    <td class="opacity-50 text-xs">{user.id}</td>
+                    <td class="font-bold">{user.username}</td>
+                    <td>
+                        {#if user.isAdmin}<span class="badge badge-error badge-sm">Admin</span>
+                        {:else}<span class="badge badge-ghost badge-sm">User</span>{/if}
+                    </td>
+                    
+                    <td>
+                        {#if editingUserId === user.id}
+                            <div class="join">
+                                <input class="input input-sm input-bordered join-item w-16" type="number" step="0.5" bind:value={editingWorkHours} />
+                                <button class="btn btn-sm btn-success join-item" on:click={saveWorkHours}>✓</button>
+                                <button class="btn btn-sm btn-ghost join-item" on:click={() => editingUserId = null}>✕</button>
+                            </div>
+                        {:else}
+                            {user.yearlyWorkHours} h
+                        {/if}
+                    </td>
+
+                    <td>
+                        {#if resetPasswordUserId === user.id}
+                             <div class="join">
+                                <input class="input input-sm input-bordered join-item w-24" type="password" placeholder="Neues PW" bind:value={resetPasswordNew} />
+                                <button class="btn btn-sm btn-success join-item" on:click={savePassword}>OK</button>
+                                <button class="btn btn-sm btn-ghost join-item" on:click={() => resetPasswordUserId = null}>✕</button>
+                            </div>
+                        {:else if user.id !== 1} <div class="join">
+                                <button class="btn btn-xs btn-outline join-item" on:click={() => startEditHours(user)}>Std.</button>
+                                <button class="btn btn-xs btn-warning join-item" on:click={() => startResetPassword(user)}>PW</button>
+                                <button class="btn btn-xs btn-error join-item" on:click={() => handleDelete(user.id)}>Del</button>
+                            </div>
+                        {/if}
+                    </td>
+                </tr>
+            {/each}
+        </tbody>
+    </table>
+</div>
diff --git a/frontend/src/lib/api.js b/frontend/src/lib/api.js
new file mode 100644
index 0000000..8eabbe7
--- /dev/null
+++ b/frontend/src/lib/api.js
@@ -0,0 +1,221 @@
+import { get } from 'svelte/store';
+import { auth, addToast, loading } from './stores';
+
+const BASE_URL = '/api';
+
+function parseJwt(token) {
+    if (!token) return {};
+    try {
+        const base64Url = token.split('.')[1];
+        if (!base64Url) return {};
+        let base64 = base64Url.replace(/-/g, '+').replace(/_/g, '/');
+        const padding = base64.length % 4;
+        if (padding) base64 += '='.repeat(4 - padding);
+        const jsonPayload = decodeURIComponent(window.atob(base64).split('').map(c => 
+            '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2)
+        ).join(''));
+        return JSON.parse(jsonPayload);
+    } catch (e) {
+        console.error("JWT Parse Error:", e);
+        return {};
+    }
+}
+
+function mapScheduleFromApi(s) {
+    return {
+        id: s.id, dayOfWeek: s.day_of_week, startTime: s.start_time,
+        endTime: s.end_time, scheduleType: s.type, title: s.title
+    };
+}
+function mapScheduleToApi(s) {
+    return {
+        day_of_week: parseInt(s.dayOfWeek), start_time: s.startTime,
+        end_time: s.endTime, type: s.scheduleType, title: s.title
+    };
+}
+function mapTimeEntryFromApi(e) {
+    return {
+        id: e.id, userId: e.user_id, scheduleId: e.schedule_id, date: e.date,
+        entryType: e.type || e.entry_type, username: e.username,
+        startTime: e.start_time, endTime: e.end_time
+    };
+}
+
+function mapUserFromApi(u) {
+    return {
+        ...u, 
+        yearlyWorkHours: u.yearly_hours || u.yearly_work_hours || u.yearlyWorkHours || 0,
+        isAdmin: !!(u.isAdmin || u.is_admin)
+    };
+}
+
+async function request(endpoint, method = 'GET', body = null, isBlob = false) {
+  loading.set(true);
+  const token = get(auth).token;
+  const headers = {};
+  
+  if (!isBlob) headers['Content-Type'] = 'application/json';
+  if (token) headers['Authorization'] = `Bearer ${token}`;
+
+  try {
+    const res = await fetch(`${BASE_URL}${endpoint}`, {
+      method, headers, body: body ? JSON.stringify(body) : null
+    });
+
+    loading.set(false);
+
+    if (!res.ok) {
+      if (res.status === 401) {
+        if (get(auth).isAuthenticated) {
+            addToast("Ihre Sitzung ist abgelaufen. Bitte neu anmelden.", "warning");
+            logout(); 
+        }
+        throw new Error('Sitzung abgelaufen');
+      }
+
+      const errText = await res.text();
+      let errorMsg = errText || `Fehler: ${res.status}`;
+      
+      try {
+          const jsonErr = JSON.parse(errText);
+          if(jsonErr.message) errorMsg = jsonErr.message;
+      } catch(e) {}
+
+      throw new Error(errorMsg);
+    }
+
+    if (isBlob) return await res.blob();
+    const text = await res.text();
+    return text ? JSON.parse(text) : null;
+
+  } catch (error) {
+    loading.set(false);
+    
+    if (error.message === 'Sitzung abgelaufen') {
+        throw error;
+    }
+
+    if (error.name === 'TypeError' && error.message.includes('fetch')) {
+        addToast("Verbindung zum Server fehlgeschlagen. Sind Sie online?", "error");
+        throw new Error("Verbindungsfehler");
+    }
+
+    if (endpoint !== '/login') {
+        addToast(error.message || "Unbekannter Fehler", 'error');
+    }
+    
+    throw error;
+  }
+}
+
+export const login = async (username, password) => {
+  try {
+      const data = await request('/login', 'POST', { username, password });
+      const jwtData = parseJwt(data.token);
+      
+      const userObj = {
+          username: data.username,
+          is_admin: data.is_admin,
+          id: jwtData.user_id || jwtData.id || data.id || 0
+      };
+      
+      auth.set({ token: data.token, user: mapUserFromApi(userObj), isAuthenticated: true });
+      addToast("Erfolgreich angemeldet", "success");
+      return true;
+  } catch (e) {
+      addToast("Anmeldung fehlgeschlagen. Prüfen Sie Benutzername und Passwort.", "error");
+      return false;
+  }
+};
+
+export const logout = () => {
+  auth.set({ token: null, user: null, isAuthenticated: false });
+};
+
+export const getSchedules = async () => {
+    const data = await request('/schedules');
+    return data.map(mapScheduleFromApi);
+};
+
+export const createSchedule = (s) => {
+    const payload = mapScheduleToApi(s);
+    return request('/admin/schedules', 'POST', payload);
+};
+
+export const deleteSchedule = (id) => request(`/admin/schedules/delete?id=${id}`, 'DELETE');
+
+export const getMyTimeEntries = async () => {
+    const data = await request('/my-time-entries');
+    return data.map(mapTimeEntryFromApi);
+};
+
+export const saveTimeEntriesBatch = (entries) => request('/time-entries/batch', 'POST', { entries });
+export const deleteWeekEntries = (year, week) => request(`/my-time-entries/week?year=${year}&week=${week}`, 'DELETE');
+
+export const getUsers = async () => {
+    const data = await request('/admin/users/list');
+    return data.map(mapUserFromApi);
+};
+
+export const createUser = (u) => request('/admin/users', 'POST', { username: u.username, password: u.password, is_admin: u.isAdmin });
+export const deleteUser = (id) => request(`/admin/users/delete?id=${id}`, 'DELETE');
+
+export const updateUserWorkHours = (id, hours) => request(`/admin/users/${id}`, 'PUT', { yearly_hours: parseFloat(hours) });
+export const resetUserPassword = (id, new_password) => request(`/admin/users/${id}/reset-password`, 'PUT', { new_password });
+
+export const getAllTimeEntries = async () => {
+    const data = await request('/admin/time-entries');
+    return data.map(mapTimeEntryFromApi);
+};
+
+export const updateTimeEntry = (id, entry) => {
+    const payload = { date: entry.date, start_time: entry.startTime, end_time: entry.endTime, type: entry.entryType };
+    return request(`/admin/time-entries/${id}`, 'PUT', payload);
+};
+
+export const deleteTimeEntry = (id) => request(`/admin/time-entries/${id}`, 'DELETE');
+
+export const createAdminTimeEntry = (entry) => request('/admin/time-entry', 'POST', {
+    user_id: entry.selectedUserId, date: entry.date, hours: parseFloat(entry.hours), type: 'manual'
+});
+
+export const getYearlySummary = async () => {
+    const data = await request('/yearly-hours-summary');
+    return data.map(s => ({ ...s, userId: s.user_id, yearlyTarget: s.yearly_target, yearlyActual: s.yearly_actual, remainingYearly: s.remaining_yearly }));
+};
+
+export const downloadYearlySummaryPDF = () => request('/admin/yearly-summary/pdf', 'GET', null, true);
+
+export const getSchoolYears = async () => {
+    const data = await request('/admin/school-years');
+    return data.map(sy => ({ ...sy, startDate: sy.start_date, endDate: sy.end_date, isActive: sy.is_active }));
+};
+
+export const getActiveSchoolYear = async () => {
+    const sy = await request('/school-year/active');
+    if(!sy) return null;
+    return { ...sy, startDate: sy.start_date, endDate: sy.end_date, isActive: sy.is_active };
+};
+
+export const uploadLogo = async (file) => {
+    const formData = new FormData();
+    formData.append('logo', file);
+    
+    const token = localStorage.getItem('token');
+    
+    const res = await fetch('/api/admin/settings/logo', {
+        method: 'POST',
+        headers: {
+            'Authorization': `Bearer ${token}` 
+        },
+        body: formData
+    });
+    
+    if (!res.ok) throw new Error("Upload fehlgeschlagen");
+    return true;
+};
+
+export const createSchoolYear = (sy) => request('/admin/school-years', 'POST', { name: sy.name, start_date: sy.startDate, end_date: sy.endDate });
+export const activateSchoolYear = (id) => request(`/admin/school-years/${id}/activate`, 'PUT');
+export const deleteSchoolYear = (id) => request(`/admin/school-years/${id}`, 'DELETE');
+export const changeMyPassword = (oldPw, newPw) => request('/change-password', 'POST', { old_password: oldPw, new_password: newPw });
diff --git a/frontend/src/lib/stores.js b/frontend/src/lib/stores.js
new file mode 100644
index 0000000..795939f
--- /dev/null
+++ b/frontend/src/lib/stores.js
@@ -0,0 +1,71 @@
+import { writable, get } from 'svelte/store';
+
+function safeParse(jsonString) {
+  if (!jsonString || jsonString === 'undefined' || jsonString === 'null') return null;
+  try { return JSON.parse(jsonString); } catch (e) { return null; }
+}
+
+function decodeJwt(token) {
+    try {
+        const base64Url = token.split('.')[1];
+        const base64 = base64Url.replace(/-/g, '+').replace(/_/g, '/');
+        const jsonPayload = decodeURIComponent(window.atob(base64).split('').map(c => 
+            '%' + ('00' + c.charCodeAt(0).toString(16)).slice(-2)
+        ).join(''));
+        return JSON.parse(jsonPayload);
+    } catch (e) { return null; }
+}
+
+const normalizeUser = (u) => {
+  if (!u) return null;
+  return { ...u, isAdmin: !!(u.isAdmin || u.is_admin) };
+};
+
+const storedToken = localStorage.getItem('token');
+let initialUser = normalizeUser(safeParse(localStorage.getItem('user')));
+let initialAuth = false;
+
+if (storedToken) {
+    const decoded = decodeJwt(storedToken);
+    const currentTime = Date.now() / 1000;
+    
+    if (decoded && decoded.exp && decoded.exp < currentTime) {
+        console.warn("Token im Storage ist abgelaufen. Auto-Logout.");
+        localStorage.removeItem('token');
+        localStorage.removeItem('user');
+        initialUser = null;
+    } else {
+        initialAuth = !!initialUser;
+    }
+}
+
+export const auth = writable({
+  token: initialAuth ? storedToken : null,
+  user: initialUser,
+  isAuthenticated: initialAuth
+});
+
+auth.subscribe(value => {
+  if (value.token && value.user) {
+    localStorage.setItem('token', value.token);
+    localStorage.setItem('user', JSON.stringify(value.user));
+  } else {
+    localStorage.removeItem('token');
+    localStorage.removeItem('user');
+  }
+});
+
+export const loading = writable(false);
+
+export const toasts = writable([]);
+
+export function addToast(message, type = 'info') {
+  const id = Date.now() + Math.random(); 
+  const newToast = { id, message, type }; 
+  toasts.update(all => [newToast, ...all]);
+  setTimeout(() => removeToast(id), 5000); 
+}
+
+export function removeToast(id) {
+  toasts.update(all => all.filter(t => t.id !== id));
+}
diff --git a/frontend/src/lib/utils.js b/frontend/src/lib/utils.js
new file mode 100644
index 0000000..468eae9
--- /dev/null
+++ b/frontend/src/lib/utils.js
@@ -0,0 +1,51 @@
+export function calculateHours(startTime, endTime) {
+  if (!startTime || !endTime) return 0;
+  if (endTime === 'manual') return parseFloat(startTime) || 0;
+
+  const parseTime = (timeStr) => {
+    const parts = timeStr.split(':');
+    if (parts.length !== 2) return 0;
+    return parseFloat(parts[0]) + parseFloat(parts[1]) / 60;
+  };
+
+  const start = parseTime(startTime);
+  const end = parseTime(endTime);
+
+  if (end > start) return end - start;
+  return 0;
+}
+
+export function getISOWeek(date) {
+  const d = new Date(Date.UTC(date.getFullYear(), date.getMonth(), date.getDate()));
+  const dayNum = d.getUTCDay() || 7;
+  d.setUTCDate(d.getUTCDate() + 4 - dayNum);
+  const yearStart = new Date(Date.UTC(d.getUTCFullYear(), 0, 1));
+  return Math.ceil((((d - yearStart) / 86400000) + 1) / 7);
+}
+
+export function getISOYear(date) {
+    const d = new Date(Date.UTC(date.getFullYear(), date.getMonth(), date.getDate()));
+    const dayNum = d.getUTCDay() || 7;
+    d.setUTCDate(d.getUTCDate() + 4 - dayNum);
+    return d.getUTCFullYear();
+}
+
+export function getDateOfISOWeek(w, y) {
+  const simple = new Date(y, 0, 1 + (w - 1) * 7);
+  const dow = simple.getDay();
+  const ISOweekStart = simple;
+  if (dow <= 4)
+      ISOweekStart.setDate(simple.getDate() - simple.getDay() + 1);
+  else
+      ISOweekStart.setDate(simple.getDate() + 8 - simple.getDay());
+  return ISOweekStart;
+}
+
+export function formatDate(date) {
+  const year = date.getFullYear();
+  const month = String(date.getMonth() + 1).padStart(2, '0');
+  const day = String(date.getDate()).padStart(2, '0');
+  return `${year}-${month}-${day}`;
+}
+
+export const dayNames = ["Montag", "Dienstag", "Mittwoch", "Donnerstag", "Freitag"];
diff --git a/frontend/src/main.js b/frontend/src/main.js
new file mode 100644
index 0000000..a2beaa5
--- /dev/null
+++ b/frontend/src/main.js
@@ -0,0 +1,9 @@
+import { mount } from 'svelte';
+import './app.css';
+import App from './App.svelte';
+
+const app = mount(App, {
+  target: document.getElementById('app'),
+});
+
+export default app;
diff --git a/frontend/svelte.config.js b/frontend/svelte.config.js
new file mode 100644
index 0000000..96b3455
--- /dev/null
+++ b/frontend/svelte.config.js
@@ -0,0 +1,8 @@
+import { vitePreprocess } from '@sveltejs/vite-plugin-svelte'
+
+/** @type {import("@sveltejs/vite-plugin-svelte").SvelteConfig} */
+export default {
+  // Consult https://svelte.dev/docs#compile-time-svelte-preprocess
+  // for more information about preprocessors
+  preprocess: vitePreprocess(),
+}
diff --git a/frontend/tailwind.config.js b/frontend/tailwind.config.js
new file mode 100644
index 0000000..773ab5a
--- /dev/null
+++ b/frontend/tailwind.config.js
@@ -0,0 +1,15 @@
+/** @type {import('tailwindcss').Config} */
+export default {
+  content: [
+    "./src/**/*.{html,js,svelte,ts}", 
+  ],
+  theme: {
+    extend: {},
+  },
+  plugins: [
+    require('daisyui'),
+  ],
+  daisyui: {
+    themes: ["light", "dark"],
+  },
+}
diff --git a/frontend/vite.config.js b/frontend/vite.config.js
new file mode 100644
index 0000000..64d63ba
--- /dev/null
+++ b/frontend/vite.config.js
@@ -0,0 +1,18 @@
+import { defineConfig } from 'vite'
+import { svelte } from '@sveltejs/vite-plugin-svelte'
+import tailwindcss from '@tailwindcss/vite';
+
+export default defineConfig({
+  plugins: [
+    svelte(),
+    tailwindcss()
+  ],
+  server: {
+    proxy: {
+      '/api': {
+        target: 'http://127.0.0.1:8085',
+        changeOrigin: true
+      }
+    }
+  }
+})