Adopt Riverpod codegen and reorganize models

Author: dhruvi-16-me

lib/providers/dashboard/dashboard_controller.dart

@@ -1,9 +1,13 @@
-import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
 
-import 'dashboard_state.dart';
+import 'models/dashboard_state.dart';
+import 'models/enums/dashboard_list_filter.dart';
+
+part 'dashboard_controller.g.dart';
 
 /// Single controller for dashboard-related Riverpod state.
-class DashboardController extends Notifier<DashboardState> {
+@Riverpod(keepAlive: true)
+class DashboardController extends _$DashboardController {
   @override
   DashboardState build() => const DashboardState();
 
@@ -32,9 +36,3 @@ class DashboardController extends Notifier<DashboardState> {
     state = const DashboardState();
   }
 }
-
-/// Unified dashboard state provider.
-final dashboardControllerProvider =
-    NotifierProvider<DashboardController, DashboardState>(
-  DashboardController.new,
-);

lib/providers/dashboard/dashboard_controller.g.dart

@@ -1,14 +1,8 @@
 import 'package:freezed_annotation/freezed_annotation.dart';
 
-part 'dashboard_state.freezed.dart';
+import 'enums/dashboard_list_filter.dart';
 
-/// Filter applied to dashboard lists (tasks, tickets, meetings).
-enum DashboardListFilter {
-  all,
-  tasks,
-  tickets,
-  meetings,
-}
+part 'dashboard_state.freezed.dart';
 
 /// Dashboard UI state managed by [DashboardController].
 ///

…providers/dashboard/dashboard_state.dart …rs/dashboard/models/dashboard_state.dartlib/providers/dashboard/dashboard_state.dart renamed to lib/providers/dashboard/models/dashboard_state.dart lib/providers/dashboard/dashboard_state.dart renamed to lib/providers/dashboard/models/dashboard_state.dart

@@ -0,0 +1,7 @@
+/// Filter applied to dashboard lists (tasks, tickets, meetings).
+enum DashboardListFilter {
+  all,
+  tasks,
+  tickets,
+  meetings,
+}

…s/dashboard/dashboard_state.freezed.dart …oard/models/dashboard_state.freezed.dartlib/providers/dashboard/dashboard_state.freezed.dart renamed to lib/providers/dashboard/models/dashboard_state.freezed.dart lib/providers/dashboard/dashboard_state.freezed.dart renamed to lib/providers/dashboard/models/dashboard_state.freezed.dart

@@ -43,6 +43,7 @@ dependencies:
   # State management
   provider: ^6.1.2
   flutter_riverpod: ^2.6.1
+  riverpod_annotation: ^2.6.1
   freezed_annotation: ^2.4.4
 
   # Local storage
@@ -88,6 +89,7 @@ dev_dependencies:
   flutter_lints: ^5.0.0
   build_runner: ^2.4.13
   freezed: ^2.5.7
+  riverpod_generator: ^2.6.1
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec