Initial commit: Fabled Android app

Flutter Android client for FabledAssistant with:
- Session-cookie auth via persistent cookie jar (Dio + cookie_jar)
- OAuth/SSO login via in-app WebView (flutter_inappwebview)
- Notes: list, detail (markdown render), create/edit
- Tasks: list with status tabs, create/edit with priority
- Chat: SSE streaming bubbles, conversation management
- Quick Capture FAB for rapid note/task creation
- Settings screen (change server URL, logout)
- Android home screen widget → opens chat
- Riverpod state management, go_router navigation

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

lib/data/repositories/notes_repository.dart

@@ -0,0 +1,15 @@
+import '../api/notes_api.dart';
+import '../models/note.dart';
+
+class NotesRepository {
+  final NotesApi _api;
+  const NotesRepository(this._api);
+
+  Future<List<Note>> getAll() => _api.getAll();
+  Future<Note> getOne(int id) => _api.getOne(id);
+  Future<Note> create(String title, String body) =>
+      _api.create(title, body);
+  Future<Note> update(int id, String title, String body) =>
+      _api.update(id, title, body);
+  Future<void> delete(int id) => _api.delete(id);
+}