docs: update README

README.md

@@ -1,16 +1,51 @@
 # timetracker
 
-A new Flutter project.
+A cross-platform time tracker built with Flutter for the frontend and Rust for the backend logic. Communication is handled via `flutter_rust_bridge`, and data is stored locally on the device using SQLite. The user interface adapts to the native look-and-feel of Android and iOS thanks to `flutter_platform_widgets`.
 
-## Getting Started
+## Features
 
-This project is a starting point for a Flutter application.
+* **Time Tracking:** Start and stop time tracking entries.
+* **Tag Management:**
+    * Create new tags.
+    * List all tags.
+    * Edit tag names (via swipe gesture).
+    * Delete tags (via swipe gesture, includes confirmation). Associated time entries will have their tag set to NULL.
+* **Local Storage:** All data is securely stored in a local SQLite database on the device (managed by Rust).
+* **Reporting:**
+    * Display time entries filtered by period (Day, Week, Month, Year) and optionally by tag.
+    * Total duration display for the filtered period.
+    * Visualization using charts (`fl_chart`):
+        * **Bar chart:** Distribution of daily time spent per tag for the selected period.
+    * List view for report entries.
+    * **Pull-to-Refresh:** Manually refresh report data.
+    * **Swipe-to-Delete:** Delete individual time entries directly from the report list via swipe gesture (with confirmation).
+* **Platform-Adaptive UI:** Uses `flutter_platform_widgets` to provide a native appearance on Android (Material Design) and iOS (Cupertino).
 
-A few resources to get you started if this is your first Flutter project:
+## Technologies
 
-- [Lab: Write your first Flutter app](https://docs.flutter.dev/get-started/codelab)
+* **Frontend:** Flutter / Dart
-- [Cookbook: Useful Flutter samples](https://docs.flutter.dev/cookbook)
+    * State Management: `provider`
+    * UI Adaptation: `flutter_platform_widgets`
+    * Charts: `fl_chart`
+    * Swipe Actions: `flutter_slidable`
+    * Intl: `intl`
+* **Backend:** Rust
+    * Database: SQLite (via `rusqlite`)
+    * Error Handling: `anyhow`
+    * Logging: `log`
+* **Bridge:** `flutter_rust_bridge`
+* **Build:** Cargo, Flutter Build Tools, Gradle (Android), Xcode (iOS)
 
-For help getting started with Flutter development, view the
+## Architecture
-[online documentation](https://docs.flutter.dev/), which offers tutorials,
+
-samples, guidance on mobile development, and a full API reference.
+The app follows a clear separation between UI and logic:
+
+`Flutter UI (Widgets)` <-> `Dart Service Layer (TimeTrackingService)` <-> `flutter_rust_bridge (Generated Bindings)` <-> `Rust API (api.rs)` <-> `Rust DB Logic (database.rs)` <-> `SQLite Database`
+
+## Contributing
+
+Contributions are welcome! Please create an issue to report bugs or suggest new features. Pull requests are also welcome.
+
+## License
+
+[MIT License]