feat(approvals): 결재 접근 차단 대응과 전표 전이 메모 전달 강화

- approvals 모듈에서 APPROVAL_ACCESS_DENIED 응답을 포착하여 ApprovalAccessDeniedException으로 변환하고 접근 거부 시 토스트·대시보드 리다이렉트를 처리

- approval history 조회가 서버 action id에 맞춰 필터링되도록 repository·controller·테스트를 보강

- 재고 트랜잭션 상태 전이 API 호출에 note를 전달하도록 repository·컨트롤러·통합/단위 테스트를 업데이트

- 승인 플로우 QA 체크리스트 및 연동 문서를 최신 계약과 테스트 흐름으로 업데이트

lib/features/inventory/transactions/data/repositories/stock_transaction_repository_remote.dart

@@ -82,50 +82,43 @@ class StockTransactionRepositoryRemote implements StockTransactionRepository {
   }
 
   @override
-  Future<StockTransaction> submit(int id) async {
-    final response = await _api.post<Map<String, dynamic>>(
-      '$_basePath/$id/submit',
-      data: {'id': id},
-      options: Options(responseType: ResponseType.json),
-    );
-    return _parseSingle(response.data);
+  Future<StockTransaction> submit(int id, {String? note}) async {
+    return _postTransition(id: id, action: 'submit', note: note);
   }
 
   @override
-  Future<StockTransaction> complete(int id) async {
-    final response = await _api.post<Map<String, dynamic>>(
-      '$_basePath/$id/complete',
-      data: {'id': id},
-      options: Options(responseType: ResponseType.json),
-    );
-    return _parseSingle(response.data);
+  Future<StockTransaction> complete(int id, {String? note}) async {
+    return _postTransition(id: id, action: 'complete', note: note);
   }
 
   @override
-  Future<StockTransaction> approve(int id) async {
-    final response = await _api.post<Map<String, dynamic>>(
-      '$_basePath/$id/approve',
-      data: {'id': id},
-      options: Options(responseType: ResponseType.json),
-    );
-    return _parseSingle(response.data);
+  Future<StockTransaction> approve(int id, {String? note}) async {
+    return _postTransition(id: id, action: 'approve', note: note);
   }
 
   @override
-  Future<StockTransaction> reject(int id) async {
-    final response = await _api.post<Map<String, dynamic>>(
-      '$_basePath/$id/reject',
-      data: {'id': id},
-      options: Options(responseType: ResponseType.json),
-    );
-    return _parseSingle(response.data);
+  Future<StockTransaction> reject(int id, {String? note}) async {
+    return _postTransition(id: id, action: 'reject', note: note);
   }
 
   @override
-  Future<StockTransaction> cancel(int id) async {
+  Future<StockTransaction> cancel(int id, {String? note}) async {
+    return _postTransition(id: id, action: 'cancel', note: note);
+  }
+
+  Future<StockTransaction> _postTransition({
+    required int id,
+    required String action,
+    String? note,
+  }) async {
+    final payload = <String, dynamic>{'id': id};
+    final trimmedNote = note?.trim();
+    if (trimmedNote != null && trimmedNote.isNotEmpty) {
+      payload['note'] = trimmedNote;
+    }
     final response = await _api.post<Map<String, dynamic>>(
-      '$_basePath/$id/cancel',
-      data: {'id': id},
+      '$_basePath/$id/$action',
+      data: payload,
       options: Options(responseType: ResponseType.json),
     );
     return _parseSingle(response.data);