fix(feedback): 隐藏页加返回按钮 + 入库时间用东八区

- FeedbackAdminPage / EleImportPage 头部加 ← 返回按钮：
  优先 history.back（来自 SPA 内跳转），否则 hash=#mileage 兜底回主页
- 反馈入库（created_at / reply_at）改为 DATE_ADD(UTC_TIMESTAMP, INTERVAL 8 HOUR)
  不再依赖 MySQL/容器的本地时区设置，固定 CST

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/modules/admin/FeedbackAdminPage.tsx

@@ -1,6 +1,6 @@
 import { useCallback, useEffect, useState } from 'react';
 import { motion, AnimatePresence } from 'motion/react';
-import { Inbox, RotateCcw, X, Send, CheckCircle2, AlertCircle, Image as ImageIcon, Loader2 } from 'lucide-react';
+import { Inbox, RotateCcw, X, Send, CheckCircle2, AlertCircle, Image as ImageIcon, Loader2, ArrowLeft } from 'lucide-react';
 import { fetchJson } from '../../auth/api-client';
 
 interface FeedbackItem {
@@ -129,16 +129,27 @@ export default function FeedbackAdminPage() {
     <div className="min-h-screen bg-[#F8F9FB] p-4 md:p-8">
       <div className="max-w-5xl mx-auto space-y-4">
         <header className="flex items-center justify-between">
-          <div className="flex items-center gap-3">
-            <div className="w-10 h-10 rounded-xl bg-gradient-to-br from-blue-500 to-cyan-400 flex items-center justify-center">
+          <div className="flex items-center gap-3 min-w-0">
+            <button
+              onClick={() => {
+                // 优先 history.back（来自 SPA 内部跳转）；否则回到主页
+                if (window.history.length > 1) window.history.back();
+                else { window.location.hash = '#mileage'; }
+              }}
+              className="w-9 h-9 rounded-xl bg-white border border-slate-100 hover:border-blue-200 hover:bg-blue-50 hover:text-blue-600 text-slate-500 flex items-center justify-center transition-colors flex-shrink-0"
+              title="返回"
+            >
+              <ArrowLeft size={16} />
+            </button>
+            <div className="w-10 h-10 rounded-xl bg-gradient-to-br from-blue-500 to-cyan-400 flex items-center justify-center flex-shrink-0">
               <Inbox size={18} className="text-white" />
             </div>
-            <div>
+            <div className="min-w-0">
               <h1 className="text-lg font-black text-slate-900 leading-tight">用户反馈管理</h1>
               <p className="text-[11px] font-bold text-slate-400">查看、回复、跟进用户提交的建议</p>
             </div>
           </div>
-          <button onClick={reload} className="p-2 text-slate-400 hover:text-blue-500" title="刷新">
+          <button onClick={reload} className="p-2 text-slate-400 hover:text-blue-500 flex-shrink-0" title="刷新">
             <RotateCcw size={16} className={loading ? 'animate-spin' : ''} />
           </button>
         </header>

src/modules/ele/EleImportPage.tsx

@@ -2,7 +2,7 @@ import { useCallback, useEffect, useRef, useState } from 'react';
 import { motion, AnimatePresence } from 'motion/react';
 import {
   Upload, FileSpreadsheet, RotateCcw, CheckCircle2, AlertCircle,
-  Truck, ExternalLink, Layers, Zap,
+  Truck, ExternalLink, Layers, Zap, ArrowLeft,
 } from 'lucide-react';
 import { fetchJson } from '../../auth/api-client';
 import { useAuth } from '../../auth/useAuth';
@@ -138,16 +138,26 @@ export default function EleImportPage() {
     <div className="min-h-screen bg-[#F8F9FB] text-gray-800 p-4 md:p-8">
       <div className="max-w-6xl mx-auto space-y-4">
         <header className="flex items-center justify-between">
-          <div className="flex items-center gap-3">
-            <div className="w-10 h-10 rounded-xl bg-blue-600 flex items-center justify-center">
+          <div className="flex items-center gap-3 min-w-0">
+            <button
+              onClick={() => {
+                if (window.history.length > 1) window.history.back();
+                else { window.location.hash = '#mileage'; }
+              }}
+              className="w-9 h-9 rounded-xl bg-white border border-slate-100 hover:border-blue-200 hover:bg-blue-50 hover:text-blue-600 text-slate-500 flex items-center justify-center transition-colors flex-shrink-0"
+              title="返回"
+            >
+              <ArrowLeft size={16} />
+            </button>
+            <div className="w-10 h-10 rounded-xl bg-blue-600 flex items-center justify-center flex-shrink-0">
               <Zap size={18} className="text-white" />
             </div>
-            <div>
+            <div className="min-w-0">
               <h1 className="text-lg font-black text-slate-900 leading-tight">充电记录导入</h1>
               <p className="text-[11px] font-bold text-slate-400">每日上传 xlsx · 订单编号去重 · 系统车辆自动匹配</p>
             </div>
           </div>
-          <span className="text-[10px] font-bold text-slate-400">{user?.userName || ''}</span>
+          <span className="text-[10px] font-bold text-slate-400 flex-shrink-0">{user?.userName || ''}</span>
         </header>
 
         {/* 上传区 */}

src/server/routes/feedback/index.ts

@@ -54,6 +54,9 @@ const VALID_STATUS = new Set(['open', 'in_progress', 'done', 'rejected']);
 
 const VALID_TYPES = new Set(['dimension', 'bug', 'ux', 'other']);
 
+// 写入时间戳一律用东八区 CST，避免依赖 MySQL/容器时区设置
+const CST_NOW = `DATE_ADD(UTC_TIMESTAMP(), INTERVAL 8 HOUR)`;
+
 app.post('/submit', async (c) => {
   await ensureTable();
   const body = await c.req.json().catch(() => ({})) as {
@@ -79,7 +82,7 @@ app.post('/submit', async (c) => {
 
   const [r] = await pool.query<ResultSetHeader>(
     `INSERT INTO bi_user_feedback (type, module, content, contact, screenshots, user_id, user_name, user_agent, created_at)
-     VALUES (?, ?, ?, ?, ?, ?, ?, ?, NOW())`,
+     VALUES (?, ?, ?, ?, ?, ?, ?, ?, ${CST_NOW})`,
     [type, moduleVal, content, contact, JSON.stringify(screenshots), user?.userId || null, user?.userName || null, userAgent],
   );
   return c.json({ ok: true, id: r.insertId });
@@ -174,7 +177,7 @@ app.patch('/:id', async (c) => {
   }
   if (typeof body.reply === 'string') {
     const reply = body.reply.trim().slice(0, 2000);
-    fields.push('reply_content = ?', 'reply_user = ?', 'reply_at = NOW()');
+    fields.push('reply_content = ?', 'reply_user = ?', `reply_at = ${CST_NOW}`);
     const user = (c as { get?: (k: string) => unknown }).get?.('user') as AuthUser | undefined;
     params.push(reply || null, user?.userName || user?.userId || null);
   }