fix(03-03): resolve dart analyze warnings in test files

- Remove unused drift import in daily_plan_dao_test
- Fix unused local variable in tasks_dao_test
- Switch ProviderScope to UncontrolledProviderScope in home_screen_test
  and app_shell_test to resolve riverpod_lint scoped_providers warning

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

test/shell/app_shell_test.dart

@@ -16,26 +16,31 @@ void main() {
     });
 
     /// Helper to build the app with providers overridden for testing.
+    ///
+    /// Uses [UncontrolledProviderScope] with a [ProviderContainer] to avoid
+    /// the riverpod_lint scoped_providers_should_specify_dependencies warning.
     Widget buildApp() {
-      return ProviderScope(
-        overrides: [
-          // Override the stream provider to return an empty list immediately
-          // so that the rooms screen shows the empty state without needing a DB.
-          roomWithStatsListProvider.overrideWith(
-            (ref) => Stream.value([]),
-          ),
-          // Override daily plan to return empty state so HomeScreen
-          // renders without a database.
-          dailyPlanProvider.overrideWith(
-            (ref) => Stream.value(const DailyPlanState(
-              overdueTasks: [],
-              todayTasks: [],
-              tomorrowTasks: [],
-              completedTodayCount: 0,
-              totalTodayCount: 0,
-            )),
-          ),
-        ],
+      final container = ProviderContainer(overrides: [
+        // Override the stream provider to return an empty list immediately
+        // so that the rooms screen shows the empty state without needing a DB.
+        roomWithStatsListProvider.overrideWith(
+          (ref) => Stream.value([]),
+        ),
+        // Override daily plan to return empty state so HomeScreen
+        // renders without a database.
+        dailyPlanProvider.overrideWith(
+          (ref) => Stream.value(const DailyPlanState(
+            overdueTasks: [],
+            todayTasks: [],
+            tomorrowTasks: [],
+            completedTodayCount: 0,
+            totalTodayCount: 0,
+          )),
+        ),
+      ]);
+
+      return UncontrolledProviderScope(
+        container: container,
         child: MaterialApp.router(
           routerConfig: router,
           localizationsDelegates: AppLocalizations.localizationsDelegates,