add json download on submit and improve styling

forms.html

@@ -13,7 +13,7 @@
             justify-content: center;
             min-height: 100vh;
             margin: 0;
-            font-family: 'Arial', sans-serif;
+            font-family: 'arial', sans-serif;
             transition: background-color 0.3s, color 0.3s;
         }
 
@@ -33,6 +33,8 @@
             display: flex;
             flex-direction: row;
             justify-content: space-between;
+            align-items: baseline;
+            padding: 10px;
         }
 
         .form-item2 {
@@ -176,6 +178,7 @@
                         <label for="actionEntry">Action Entry:</label>
                         <input type="text" name="actionEntry" required class="input input-bordered w-full max-w-xs"><br>
                     </div>
+                    <input type="hidden" name="filename" value="{{.Filename}}">
                     <div class="form-item2">
                         <input type="submit" value="Submit" class="btn">
                     </div>

main.go

@@ -214,9 +214,17 @@ func submitHandler(filename string) http.HandlerFunc {
 			http.Error(w, err.Error(), http.StatusInternalServerError)
 			return
 		}
+		// Dateiinhalt lesen
+		fileContent, err := os.ReadFile(filename)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
 
-		// Erfolgsmeldung anzeigen
-		fmt.Fprintf(w, "Monsterdaten erfolgreich gespeichert in %s: %s", filename, charJSON)
+		// Datei zum Download anbieten
+		w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%s", filename))
+		w.Header().Set("Content-Type", "application/json")
+		w.Write(fileContent)
 	}
 }