feat: 增加后端初始化逻辑，自动向数据库注入审计日志菜单与默认权限

inventory-backend/app/__init__.py

@@ -142,8 +142,17 @@ def create_app():
     except ImportError as e:
         print(f"❌ 错误: Audit 模块导入失败: {e}")
 
+    # 2.9 初始化审计日志菜单和权限（防重复）
     # -----------------------------------------------------
-    # 2.9 注册库位管理模块 (Warehouse)
+    try:
+        from app.services.permission_service import PermissionService
+        with app.app_context():
+            PermissionService.init_audit_menu()
+    except Exception as e:
+        print(f"⚠️ 审计日志菜单初始化跳过: {e}")
+
+    # -----------------------------------------------------
+    # 2.10 注册库位管理模块 (Warehouse)
     # -----------------------------------------------------
     try:
         from app.api.v1.warehouse import warehouse_bp