feat(miniprogram): 埋点事件追踪服务

- 新增 analytics.ts：trackEvent/trackPageView/flushEvents
- 事件队列本地缓存，批量上报到 /analytics/batch
- 首页 page_view、预约创建、随访提交、健康数据录入四个关键埋点

apps/miniprogram/src/pages/appointment/create/index.tsx

@@ -4,6 +4,7 @@ import Taro from '@tarojs/taro';
 import { listDoctors, createAppointment, calendarView } from '../../../services/appointment';
 import { useAuthStore } from '../../../stores/auth';
 import { TEMPLATE_IDS } from '@/services/wechat-templates';
+import { trackEvent } from '@/services/analytics';
 import StepIndicator from '../../../components/StepIndicator';
 import WeekCalendar from '../../../components/WeekCalendar';
 import './index.scss';
@@ -112,6 +113,7 @@ export default function AppointmentCreate() {
         reason: reason.trim() || undefined,
       });
       Taro.showToast({ title: '预约成功', icon: 'success' });
+      trackEvent('appointment_create', { doctor_id: selectedDoctor.id, date: appointmentDate });
       // 订阅消息引导
       const tmplId = TEMPLATE_IDS.APPOINTMENT_REMINDER;
       if (tmplId) {

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

@@ -4,6 +4,7 @@ import Taro, { useRouter } from '@tarojs/taro';
 import { getTaskDetail, submitRecord } from '../../../services/followup';
 import type { FollowUpTask } from '../../../services/followup';
 import { TEMPLATE_IDS } from '@/services/wechat-templates';
+import { trackEvent } from '@/services/analytics';
 import Loading from '../../../components/Loading';
 import ErrorState from '../../../components/ErrorState';
 import './index.scss';
@@ -42,6 +43,7 @@ export default function FollowUpDetail() {
         content: { text: content.trim() },
       });
       Taro.showToast({ title: '提交成功', icon: 'success' });
+      trackEvent('followup_submit', { task_id: id });
       const tmplId = TEMPLATE_IDS.FOLLOWUP_REMINDER;
       if (tmplId) {
         try { await Taro.requestSubscribeMessage({ tmplIds: [tmplId] }); } catch { /* 用户拒绝 */ }

apps/miniprogram/src/pages/health/input/index.tsx

@@ -5,6 +5,7 @@ import { z } from 'zod';
 import { inputVitalSign } from '../../../services/health';
 import { useAuthStore } from '../../../stores/auth';
 import { useHealthStore } from '@/stores/health';
+import { trackEvent } from '@/services/analytics';
 import './index.scss';
 
 const INDICATORS = [
@@ -76,6 +77,7 @@ export default function HealthInput() {
       });
       clearCache();
       Taro.showToast({ title: '录入成功', icon: 'success' });
+      trackEvent('health_data_input', { type: indicatorType });
       setTimeout(() => Taro.navigateBack(), 1000);
     } catch (e: unknown) {
       const msg = e instanceof Error ? e.message : '录入失败';

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

@@ -4,6 +4,7 @@ import { useAuthStore } from '../../stores/auth';
 import { useHealthStore } from '../../stores/health';
 import EmptyState from '../../components/EmptyState';
 import Loading from '../../components/Loading';
+import { trackPageView } from '@/services/analytics';
 import './index.scss';
 
 export default function Index() {
@@ -13,6 +14,7 @@ export default function Index() {
   useDidShow(() => {
     restoreAuth();
     refreshToday();
+    trackPageView('home');
   });
 
   const hour = new Date().getHours();