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/tasks_repository.dart

@@ -0,0 +1,30 @@
+import '../api/tasks_api.dart';
+import '../models/task.dart';
+
+class TasksRepository {
+  final TasksApi _api;
+  const TasksRepository(this._api);
+
+  Future<List<Task>> getAll() => _api.getAll();
+  Future<Task> getOne(int id) => _api.getOne(id);
+
+  Future<Task> create({
+    required String title,
+    String? description,
+    required TaskStatus status,
+    required TaskPriority priority,
+    DateTime? dueDate,
+  }) =>
+      _api.create(
+        title: title,
+        description: description,
+        status: status,
+        priority: priority,
+        dueDate: dueDate,
+      );
+
+  Future<Task> update(int id, Map<String, dynamic> fields) =>
+      _api.update(id, fields);
+
+  Future<void> delete(int id) => _api.delete(id);
+}