Add Freezed based dashboard state

Author: dhruvi-16-me

lib/providers/dashboard/dashboard_controller.dart

@@ -0,0 +1,40 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import 'dashboard_state.dart';
+
+/// Single controller for dashboard-related Riverpod state.
+class DashboardController extends Notifier<DashboardState> {
+  @override
+  DashboardState build() => const DashboardState();
+
+  /// Sets chart range: 0 = week, 1 = month.
+  void setTimeRange(int timeRange) {
+    state = state.copyWith(timeRange: timeRange);
+  }
+
+  /// Sets the active workspace/team id.
+  void setSelectedTeam(String? teamId) {
+    state = state.copyWith(selectedTeamId: teamId);
+  }
+
+  /// Clears the selected team.
+  void clearSelectedTeam() {
+    setSelectedTeam(null);
+  }
+
+  /// Sets the dashboard list filter.
+  void setFilter(DashboardListFilter filter) {
+    state = state.copyWith(listFilter: filter);
+  }
+
+  /// Resets dashboard state to defaults.
+  void reset() {
+    state = const DashboardState();
+  }
+}
+
+/// Unified dashboard state provider.
+final dashboardControllerProvider =
+    NotifierProvider<DashboardController, DashboardState>(
+  DashboardController.new,
+);

lib/providers/dashboard/dashboard_state.dart

@@ -0,0 +1,25 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'dashboard_state.freezed.dart';
+
+/// Filter applied to dashboard lists (tasks, tickets, meetings).
+enum DashboardListFilter {
+  all,
+  tasks,
+  tickets,
+  meetings,
+}
+
+/// Dashboard UI state managed by [DashboardController].
+///
+/// Chart range uses the same values as [DashboardScreen]: 0 = week, 1 = month.
+/// Team display name is derived from profile/teams data — only [selectedTeamId]
+/// is stored here.
+@freezed
+class DashboardState with _$DashboardState {
+  const factory DashboardState({
+    @Default(0) int timeRange,
+    String? selectedTeamId,
+    @Default(DashboardListFilter.all) DashboardListFilter listFilter,
+  }) = _DashboardState;
+}

lib/providers/dashboard/dashboard_state.freezed.dart

@@ -1,17 +1,2 @@
-import 'package:flutter_riverpod/flutter_riverpod.dart';
-
-/// Dashboard chart range: 0 = week, 1 = month.
-///
-/// Mirrors [DashboardScreen]'s `_selectedTimeRange` for future migration.
-final dashboardTimeRangeProvider = StateProvider<int>((ref) => 0);
-
-/// Active workspace/team id for dashboard context.
-/// Null until a team is selected or loaded from the profile.
-/// Display name should be derived from [SupabaseService.getCurrentUserProfile]
-final dashboardTeamIdProvider = StateProvider<String?>((ref) => null);
-
-/// Optional filter applied to dashboard lists (tasks, tickets, meetings).
-enum DashboardListFilter { all, tasks, tickets, meetings }
-
-final dashboardListFilterProvider =
-    StateProvider<DashboardListFilter>((ref) => DashboardListFilter.all);
+export 'dashboard/dashboard_controller.dart';
+export 'dashboard/dashboard_state.dart';

lib/providers/dashboard_provider.dart

@@ -43,6 +43,7 @@ dependencies:
   # State management
   provider: ^6.1.2
   flutter_riverpod: ^2.6.1
+  freezed_annotation: ^2.4.4
 
   # Local storage
   shared_preferences: ^2.5.3
@@ -85,6 +86,8 @@ dev_dependencies:
   # package. See that file for information about deactivating specific lint
   # rules and activating additional ones.
   flutter_lints: ^5.0.0
+  build_runner: ^2.4.13
+  freezed: ^2.5.7
 
 # For information on the generic Dart part of this file, see the
 # following page: https://dart.dev/tools/pub/pubspec