feat: 反馈回复通知 + 修复导入

- 管理员回复反馈时自动发送个人通知给用户
- 修复 config.ts 和 feedback.ts 的 pool 导入方式

server/src/routes/config.ts

@@ -1,5 +1,5 @@
 import { Router } from 'express'
-import { pool } from '../db/connection'
+import pool from '../db/connection'
 import { authMiddleware } from '../middleware/auth'
 
 const router = Router()
@@ -37,7 +37,7 @@ router.put('/', authMiddleware, async (req, res) => {
 
     // 批量更新配置
     for (const [key, value] of Object.entries(data)) {
-      await pool.execute(
+      await pool.query(
         'INSERT INTO sys_config (config_key, config_value) VALUES (?, ?) ON DUPLICATE KEY UPDATE config_value = ?',
         [key, value, value]
       )

server/src/routes/feedback.ts

@@ -1,5 +1,5 @@
 import { Router } from 'express'
-import { pool } from '../db/connection'
+import pool from '../db/connection'
 import { authMiddleware } from '../middleware/auth'
 
 const router = Router()
@@ -95,11 +95,40 @@ router.put('/:id/status', authMiddleware, async (req, res) => {
       return res.status(400).json({ error: '无效的状态' })
     }
 
+    // 查询反馈信息（用于发送通知）
+    const [feedbackRows] = await pool.execute(
+      'SELECT user_id, content FROM feedbacks WHERE id = ?',
+      [id]
+    )
+    const feedback = (feedbackRows as any[])[0]
+
     await pool.execute(
       'UPDATE feedbacks SET status = ?, admin_reply = ? WHERE id = ?',
       [status, admin_reply || '', id]
     )
 
+    // 如果有管理员回复，发送通知给反馈提交者
+    if (feedback && admin_reply && admin_reply.trim()) {
+      const statusText: Record<string, string> = {
+        processed: '已处理',
+        ignored: '已忽略',
+        pending: '待处理'
+      }
+      const replyPreview = admin_reply.trim().length > 50
+        ? admin_reply.trim().slice(0, 50) + '...'
+        : admin_reply.trim()
+
+      await pool.execute(
+        `INSERT INTO notifications (user_id, type, title, content)
+         VALUES (?, 'personal', ?, ?)`,
+        [
+          feedback.user_id,
+          `您的反馈已${statusText[status] || '更新'}`,
+          `反馈内容：${feedback.content.slice(0, 30)}...\n\n管理员回复：${replyPreview}`
+        ]
+      )
+    }
+
     res.json({ success: true })
   } catch (error) {
     console.error('Update feedback status error:', error)