refactor: 后端核心模块功能增强与代码优化

- 完善 User/Product/Order 实体字段和关联关系
- 更新 DTO 适配新增字段
- 增强 Service 层业务逻辑和 Repository 查询方法
- 优化控制器接口，完善管理后台 API
- 新增请求监控过滤器和指标服务

src/main/java/com/org/flashsalesystem/controller/AdminController.java

@@ -2,6 +2,7 @@ package com.org.flashsalesystem.controller;
 
 import com.org.flashsalesystem.service.AdminService;
 import com.org.flashsalesystem.service.FileUploadService;
+import com.org.flashsalesystem.service.OrderMigrationService;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.tags.Tag;
 import lombok.extern.slf4j.Slf4j;
@@ -28,6 +29,9 @@ public class AdminController {
     @Autowired
     private FileUploadService fileUploadService;
 
+    @Autowired
+    private OrderMigrationService orderMigrationService;
+
     /**
      * 获取仪表盘统计数据
      */
@@ -279,9 +283,10 @@ public class AdminController {
             @RequestParam(defaultValue = "1") int page,
             @RequestParam(defaultValue = "10") int size,
             @RequestParam(required = false) String keyword,
+            @RequestParam(required = false) String category,
             @RequestParam(required = false) Integer status) {
         try {
-            Object products = adminService.getProducts(page, size, keyword, status);
+            Object products = adminService.getProducts(page, size, keyword, category, status);
 
             Map<String, Object> response = new HashMap<>();
             response.put("success", true);
@@ -488,4 +493,82 @@ public class AdminController {
             return ResponseEntity.badRequest().body(response);
         }
     }
+
+    @GetMapping("/reviews/stats")
+    public ResponseEntity<Map<String, Object>> getReviewStats() {
+        Map<String, Object> response = new HashMap<>();
+        response.put("success", true);
+        response.put("message", "获取评价统计成功");
+        response.put("data", adminService.getReviewStats());
+        return ResponseEntity.ok(response);
+    }
+
+    @GetMapping("/favorites/stats")
+    public ResponseEntity<Map<String, Object>> getFavoriteStats() {
+        Map<String, Object> response = new HashMap<>();
+        response.put("success", true);
+        response.put("message", "获取收藏统计成功");
+        response.put("data", adminService.getFavoriteStats());
+        return ResponseEntity.ok(response);
+    }
+
+    @GetMapping("/reviews")
+    public ResponseEntity<Map<String, Object>> getReviews(@RequestParam(defaultValue = "1") int page,
+                                                          @RequestParam(defaultValue = "10") int size,
+                                                          @RequestParam(required = false) String keyword) {
+        Map<String, Object> response = new HashMap<>();
+        response.put("success", true);
+        response.put("message", "获取评价列表成功");
+        response.put("data", adminService.getReviews(page, size, keyword));
+        return ResponseEntity.ok(response);
+    }
+
+    @PutMapping("/reviews/{id}")
+    public ResponseEntity<Map<String, Object>> updateReview(@PathVariable Long id,
+                                                            @RequestBody com.org.flashsalesystem.dto.ProductReviewDTO.UpdateDTO updateDTO) {
+        Map<String, Object> response = new HashMap<>();
+        response.put("success", true);
+        response.put("message", "更新评价成功");
+        response.put("data", adminService.updateReview(id, updateDTO));
+        return ResponseEntity.ok(response);
+    }
+
+    @DeleteMapping("/reviews/{id}")
+    public ResponseEntity<Map<String, Object>> deleteReview(@PathVariable Long id) {
+        adminService.deleteReview(id);
+        Map<String, Object> response = new HashMap<>();
+        response.put("success", true);
+        response.put("message", "删除评价成功");
+        return ResponseEntity.ok(response);
+    }
+
+    @GetMapping("/favorites")
+    public ResponseEntity<Map<String, Object>> getFavorites(@RequestParam(defaultValue = "1") int page,
+                                                            @RequestParam(defaultValue = "10") int size,
+                                                            @RequestParam(required = false) String keyword) {
+        Map<String, Object> response = new HashMap<>();
+        response.put("success", true);
+        response.put("message", "获取收藏列表成功");
+        response.put("data", adminService.getFavorites(page, size, keyword));
+        return ResponseEntity.ok(response);
+    }
+
+    @DeleteMapping("/favorites/{id}")
+    public ResponseEntity<Map<String, Object>> deleteFavorite(@PathVariable Long id) {
+        adminService.deleteFavorite(id);
+        Map<String, Object> response = new HashMap<>();
+        response.put("success", true);
+        response.put("message", "删除收藏成功");
+        return ResponseEntity.ok(response);
+    }
+
+    @PostMapping("/orders/migrate-items")
+    public ResponseEntity<Map<String, Object>> migrateLegacyOrderItems() {
+        Map<String, Object> response = new HashMap<>();
+        response.put("success", true);
+        response.put("message", "历史订单明细迁移完成");
+        response.put("data", orderMigrationService.migrateLegacyOrderItems());
+        return ResponseEntity.ok(response);
+    }
+
 }