fix: 个人微信发送对齐iLink规范(base_info/client_id/ret检查); 会话过期检测+重扫UI; 仅发送成功才写历史

frontend/src/pages/front/WechatBot.tsx

@@ -7,6 +7,7 @@ const WechatBot: React.FC = () => {
   const [status, setStatus] = useState<any>({ connected: false, configured: false });
   const [qrcode, setQrcode] = useState<any>(null);
   const [polling, setPolling] = useState(false);
+  const [reconnecting, setReconnecting] = useState(false);
   const [toast, setToast] = useState<{ msg: string; type: 'success' | 'error' } | null>(null);
 
   const showToast = (msg: string, type: 'success' | 'error' = 'success') => {
@@ -56,6 +57,7 @@ const WechatBot: React.FC = () => {
         const d = (res as any).data;
         if (d.status === 'confirmed' || d.connected) {
           setPolling(false);
+          setReconnecting(false);
           setStatus({ ...status, connected: true, configured: true });
           showToast('个人微信已连接！');
           loadStatus();
@@ -82,6 +84,7 @@ const WechatBot: React.FC = () => {
       await imUserAPI.disconnect();
       setPolling(false);
       setQrcode(null);
+      setReconnecting(false);
       setStatus({ connected: false, configured: false });
       showToast('已断开个人微信连接');
       loadStatus();
@@ -123,18 +126,29 @@ const WechatBot: React.FC = () => {
           </div>
           <span style={{
             padding: '4px 12px', borderRadius: '4px', fontSize: '12px',
-            background: status.connected ? '#10b98120' : '#6b728020',
-            color: status.connected ? '#10b981' : '#6b7280',
+            background: status.connected ? '#10b98120' : status.status === 'expired' ? '#ef444420' : '#6b728020',
+            color: status.connected ? '#10b981' : status.status === 'expired' ? '#ef4444' : '#6b7280',
           }}>
-            {status.connected ? '● 已连接' : status.configured ? '○ 已配置' : '○ 未绑定'}
+            {status.connected ? '● 已连接' : status.status === 'expired' ? '⚠ 会话已过期' : status.configured ? '○ 已配置' : '○ 未绑定'}
           </span>
         </div>
 
         {/* 扫码绑定 */}
         <div style={{ background: '#F8F9FC', borderRadius: '12px', padding: '24px', marginBottom: '16px' }}>
+          {status.status === 'expired' && (
+            <div style={{ background: '#fef2f2', border: '1px solid #fecaca', color: '#b91c1c', borderRadius: '8px', padding: '12px 14px', marginBottom: '16px', fontSize: '13px', lineHeight: '1.7' }}>
+              ⚠ <b>微信会话已失效</b>：检测到与微信的连接已过期（通常是服务更新/重启后导致），消息无法再送达。请点击下方「获取扫码二维码」<b>重新扫码授权</b>即可恢复，历史对话记录仍保留。
+            </div>
+          )}
           <h4 style={{ marginTop: 0, fontSize: '15px', color: '#1A1F36', marginBottom: '12px' }}>扫码授权绑定</h4>
-          {status.connected ? (
-            <div style={{ fontSize: '13px', color: '#10b981' }}>已绑定，你的个人微信正在自动收发消息并由七虎AI 应答。</div>
+          {status.connected && !reconnecting ? (
+            <div style={{ display: 'flex', flexDirection: 'column', gap: '12px' }}>
+              <div style={{ fontSize: '13px', color: '#10b981' }}>已绑定，你的个人微信正在自动收发消息并由七虎AI 应答。</div>
+              <div>
+                <button onClick={() => { setReconnecting(true); handleQrcode(); }} style={secondaryBtnStyle}>重新连接（重扫二维码）</button>
+              </div>
+              <div style={{ fontSize: '12px', color: '#9CA3AF' }}>若发现消息收不到，可点此重新扫码以重建与微信的会话。</div>
+            </div>
           ) : !qrcode ? (
             <div style={{ display: 'flex', flexDirection: 'column', alignItems: 'flex-start', gap: '12px' }}>
               <div style={{ fontSize: '13px', color: '#6B7280' }}>