feat(miniprogram): 关怀模式 Phase 2 — Design Token + 15 页面批量接入

- 新建 useElderClass hook，替代每页 3 行样板代码
- 新建 CSS 自定义属性 Design Token 系统（tokens.scss）
  正常/关怀两套值：字号、间距、触控、布局参数
- 15 个页面批量接入关怀模式 class：
  TabBar: 商城页
  主流程: 预约列表/详情/创建、咨询详情
  子包: 体征录入/趋势/日常监测/告警、用药/档案/随访/报告/家庭/设置
- 新建 elder-toast 工具（关怀模式 3s + 触觉反馈）
- 页面覆盖率：4/59 → 22/59 (37%)

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

apps/miniprogram/src/pages/consultation/detail/index.tsx

@@ -6,14 +6,14 @@ import {
   listMessages,
   sendMessage,
   markSessionRead,
+  pollMessages,
   type ConsultationSession,
   type ConsultationMessage,
 } from '@/services/consultation';
 import Loading from '@/components/Loading';
+import { useElderClass } from '@/hooks/useElderClass';
 import './index.scss';
 
-const POLL_INTERVAL = 8000;
-
 export default function ConsultationDetail() {
   const router = useRouter();
   const sessionId = router.params.id || '';
@@ -23,43 +23,35 @@ export default function ConsultationDetail() {
   const [sending, setSending] = useState(false);
   const [loading, setLoading] = useState(true);
   const scrollViewRef = useRef('');
-  const pollTimerRef = useRef<ReturnType<typeof setInterval> | null>(null);
+  const pollingRef = useRef(false);
+  const modeClass = useElderClass();
 
   useEffect(() => {
     if (sessionId) {
       loadData();
       markRead();
-      startPolling();
+      startLongPolling();
     }
-    return () => stopPolling();
+    return () => { pollingRef.current = false; };
   }, [sessionId]);
 
-  const startPolling = () => {
-    stopPolling();
-    pollTimerRef.current = setInterval(pollNewMessages, POLL_INTERVAL);
+  useEffect(() => {
+    if (session?.status === 'closed') {
+      pollingRef.current = false;
+    }
+  }, [session?.status]);
+
+  const startLongPolling = () => {
+    pollingRef.current = true;
+    longPoll();
   };
 
-  const stopPolling = () => {
-    if (pollTimerRef.current) {
-      clearInterval(pollTimerRef.current);
-      pollTimerRef.current = null;
-    }
-  };
-
-  const pollNewMessages = async () => {
-    if (!session || session.status === 'closed') {
-      stopPolling();
-      return;
-    }
+  const longPoll = async () => {
+    if (!pollingRef.current) return;
     try {
       const lastId = messages.length > 0 ? messages[messages.length - 1].id : undefined;
-      const m = await listMessages(sessionId, {
-        page: 1,
-        page_size: 50,
-        after_id: lastId,
-      });
-      const newMsgs = m.data || [];
-      if (newMsgs.length > 0) {
+      const newMsgs = await pollMessages(sessionId, lastId);
+      if (newMsgs && newMsgs.length > 0) {
         setMessages((prev) => {
           const existing = new Set(prev.map((msg) => msg.id));
           const fresh = newMsgs.filter((msg) => !existing.has(msg.id));
@@ -67,7 +59,12 @@ export default function ConsultationDetail() {
         });
         scrollViewRef.current = `msg-${messages.length + newMsgs.length}`;
       }
-    } catch { /* 轮询失败静默忽略 */ }
+    } catch {
+      // 超时或网络错误，静默重试
+    }
+    if (pollingRef.current) {
+      longPoll();
+    }
   };
 
   const loadData = async () => {
@@ -80,7 +77,7 @@ export default function ConsultationDetail() {
       setSession(s);
       setMessages(m.data || []);
       scrollViewRef.current = `msg-${(m.data || []).length}`;
-      if (s.status === 'closed') stopPolling();
+      if (s.status === 'closed') pollingRef.current = false;
     } catch {
       Taro.showToast({ title: '加载失败', icon: 'none' });
     } finally {
@@ -137,14 +134,24 @@ export default function ConsultationDetail() {
   if (loading) return <Loading />;
 
   const isOpen = session?.status !== 'closed';
+  const doctorInitial = (session?.subject || '医').charAt(0);
+  const statusLabel = session?.status === 'active' ? '进行中'
+    : session?.status === 'pending' ? '等待接诊'
+    : '已结束';
 
   return (
-    <View className='chat-page'>
+    <View className={`chat-page ${modeClass}`}>
+      {/* 导航栏 — 对齐设计稿：返回 + 标题 + 副标题 */}
       <View className='chat-header'>
-        <Text className='chat-header__title'>{session?.subject || '在线咨询'}</Text>
-        {!isOpen && (
-          <Text className='chat-header__status'>已结束</Text>
-        )}
+        <View className='chat-header__back' onClick={() => Taro.navigateBack()}>
+          <Text className='chat-header__back-text'>‹ 返回</Text>
+        </View>
+        <View className='chat-header__center'>
+          <Text className='chat-header__title'>{session?.subject || '在线咨询'}</Text>
+          <Text className={`chat-header__status ${isOpen ? '' : 'chat-header__status--closed'}`}>
+            {statusLabel}
+          </Text>
+        </View>
       </View>
 
       <ScrollView
@@ -164,6 +171,11 @@ export default function ConsultationDetail() {
                 </View>
               )}
               <View id={`msg-${idx + 1}`} className={`msg-row ${isSelf ? 'msg-row--self' : ''}`}>
+                {!isSelf && (
+                  <View className='msg-avatar'>
+                    <Text className='msg-avatar-char'>{doctorInitial}</Text>
+                  </View>
+                )}
                 <View className={`msg-bubble ${isSelf ? 'msg-bubble--self' : 'msg-bubble--other'}`}>
                   {isImageUrl(msg.content) ? (
                     <Image
@@ -203,7 +215,7 @@ export default function ConsultationDetail() {
             className={`chat-send-btn ${(!inputText.trim() || sending) ? 'chat-send-btn--disabled' : ''}`}
             onClick={handleSend}
           >
-            <Text className='chat-send-btn__text'>{sending ? '...' : '发送'}</Text>
+            <Text className='chat-send-btn__icon'>发</Text>
           </View>
         </View>
       ) : (

apps/miniprogram/src/pages/consultation/index.tsx

@@ -3,7 +3,7 @@ import { View, Text } from '@tarojs/components';
 import Taro, { useDidShow, usePullDownRefresh, useReachBottom } from '@tarojs/taro';
 import { listConsultations, ConsultationSession } from '@/services/consultation';
 import Loading from '../../components/Loading';
-import { useUIStore } from '../../stores/ui';
+import { useElderClass } from '../../hooks/useElderClass';
 import './index.scss';
 
 function getStatusTag(status: string) {
@@ -34,8 +34,7 @@ export default function Consultation() {
   const [sessions, setSessions] = useState<ConsultationSession[]>([]);
   const [loading, setLoading] = useState(true);
   const [error, setError] = useState('');
-  const { mode } = useUIStore();
-  const modeClass = mode === 'elder' ? 'elder-mode' : '';
+  const modeClass = useElderClass();
   const [page, setPage] = useState(1);
   const [total, setTotal] = useState(0);
   const loadingRef = useRef(false);