feat(app): экраны импорта отчётов, целей, доходов, ребалансировки, налогов и бенчмарков

Импорт (/imports, /instruments/pending) и фаза 4 (/goals, /income,
/rebalance, /tax, аналитика-хаб с benchmarks_card) — по
docs/ai/import-contract.md и docs/ai/phase4-contract.md. file_picker для
загрузки отчёта.

app/lib/features/goals/providers.dart

@@ -0,0 +1,23 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../../core/api/api_client.dart';
+import 'data/goals_api.dart';
+
+final goalsApiProvider = Provider<GoalsApi>((ref) => GoalsApi(ref.watch(apiProvider).dio));
+
+final goalsProvider =
+    FutureProvider.autoDispose<List<Goal>>((ref) => ref.watch(goalsApiProvider).list());
+
+/// Progress is computed server-side and refetched per goal — the client never projects
+/// anything itself.
+final goalProgressProvider =
+    FutureProvider.autoDispose.family<GoalProgress, int>((ref, id) async {
+  return ref.watch(goalsApiProvider).progress(id);
+});
+
+/// After any create/patch/delete the list and every progress card are refetched: the
+/// numbers are recomputed on the server, not patched in the app.
+void invalidateGoals(WidgetRef ref) {
+  ref.invalidate(goalsProvider);
+  ref.invalidate(goalProgressProvider);
+}