feat: add Control Room with containers and stacks management

- Add Control Room page with stacks sidebar and containers list
- Implement container actions (start/stop/restart) with snackbars
- Add container logs viewer dialog
- Add search/filter for both stacks and containers lists
- Add external links for Portainer and Netdata (url_launcher)
- Add VS Code launch configuration for Flutter web debugging

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

lib/features/control_room/stacks/data/repositories/stack_repository_impl.dart

@@ -0,0 +1,52 @@
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+import '../../domain/entities/stack.dart';
+import '../../domain/repositories/stack_repository.dart';
+import '../datasources/stacks_datasource.dart';
+
+part 'stack_repository_impl.g.dart';
+
+/// Implementation of StackRepository.
+class StackRepositoryImpl implements StackRepository {
+  StackRepositoryImpl(this._datasource);
+
+  final StacksDatasource _datasource;
+
+  @override
+  Future<List<Stack>> getStacks() async {
+    return _datasource.getStacks();
+  }
+
+  @override
+  Future<Stack> getStack(String id) async {
+    return _datasource.getStack(id);
+  }
+
+  @override
+  Future<void> startStack(String id) async {
+    await _datasource.stackAction(id, 'start');
+  }
+
+  @override
+  Future<void> stopStack(String id) async {
+    await _datasource.stackAction(id, 'stop');
+  }
+
+  @override
+  Future<void> restartStack(String id) async {
+    await _datasource.stackAction(id, 'restart');
+  }
+
+  @override
+  Future<void> removeStack(String id) async {
+    // TODO: Implement stack removal
+    throw UnimplementedError('Stack removal not yet implemented');
+  }
+}
+
+/// Provides the stack repository.
+@riverpod
+StackRepository stackRepository(StackRepositoryRef ref) {
+  final datasource = ref.watch(stacksDatasourceProvider);
+  return StackRepositoryImpl(datasource);
+}