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/features/home/presentation/home_screen_test.dart

@@ -52,16 +52,21 @@ TaskWithRoom _makeTaskWithRoom({
 }
 
 /// Build the app with dailyPlanProvider overridden to the given state.
+///
+/// Uses [UncontrolledProviderScope] with a [ProviderContainer] to avoid
+/// the riverpod_lint scoped_providers_should_specify_dependencies warning.
 Widget _buildApp(DailyPlanState planState) {
-  return ProviderScope(
-    overrides: [
-      dailyPlanProvider.overrideWith(
-        (ref) => Stream.value(planState),
-      ),
-      roomWithStatsListProvider.overrideWith(
-        (ref) => Stream.value([]),
-      ),
-    ],
+  final container = ProviderContainer(overrides: [
+    dailyPlanProvider.overrideWith(
+      (ref) => Stream.value(planState),
+    ),
+    roomWithStatsListProvider.overrideWith(
+      (ref) => Stream.value([]),
+    ),
+  ]);
+
+  return UncontrolledProviderScope(
+    container: container,
     child: MaterialApp.router(
       routerConfig: router,
       localizationsDelegates: AppLocalizations.localizationsDelegates,