fix(auth+miniprogram): 清除全部审计遗留问题

MEDIUM:
- WechatLoginReq/WechatBindPhoneReq 添加 Validate 派生 + 字段校验规则
- handler 中调用 req.validate() 并 map_err 转换
- 新增 AuthError::DbError 变体，wechat_service 所有 DB 错误从 Validation 改为 DbError
- DbError 映射到 AppError::Internal，不再误导前端

LOW:
- fetch_session 改用 reqwest Client.query() 构建参数，自动 URL 编码
- app.tsx PropsWithChildren<any> 改为 Record<string, unknown>
- login handleGetPhone 回调 e: any 改为内联类型
- appointment/create 4 个事件回调 e: any 改为内联类型
- health/input catch (e: any) 改为 catch (e: unknown) + instanceof 守卫
- report/detail Object.entries 去掉 [string, any] 类型断言
- wechat_service 移除 decrypt_phone_placeholder 函数，内联占位注释

apps/miniprogram/src/app.tsx

@@ -1,7 +1,7 @@
 import { PropsWithChildren } from 'react';
 import './app.scss';
 
-function App({ children }: PropsWithChildren<any>) {
+function App({ children }: PropsWithChildren<Record<string, unknown>>) {
   return children;
 }
 

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

@@ -29,7 +29,7 @@ export default function AppointmentCreate() {
   const currentPatient = useAuthStore((s) => s.currentPatient);
 
   // Step 1: 选择科室后加载医生列表
-  const onDepartmentChange = useCallback(async (e: any) => {
+  const onDepartmentChange = useCallback(async (e: { detail: { value: number } }) => {
     const idx = e.detail.value;
     const dept = DEPARTMENTS[idx];
     setDeptPickerIndex(idx);
@@ -50,17 +50,17 @@ export default function AppointmentCreate() {
   }, []);
 
   // Step 3: 日期变更
-  const onDateChange = useCallback((e: any) => {
+  const onDateChange = useCallback((e: { detail: { value: string } }) => {
     setAppointmentDate(e.detail.value);
   }, []);
 
   // Step 3: 时段变更
-  const onTimeSlotChange = useCallback((e: any) => {
+  const onTimeSlotChange = useCallback((e: { detail: { value: string } }) => {
     setTimeSlot(e.detail.value);
   }, []);
 
   // Step 3: 备注变更
-  const onReasonChange = useCallback((e: any) => {
+  const onReasonChange = useCallback((e: { detail: { value: string } }) => {
     setReason(e.detail.value);
   }, []);
 

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

@@ -59,8 +59,9 @@ export default function HealthInput() {
       }
       Taro.showToast({ title: '录入成功', icon: 'success' });
       setTimeout(() => Taro.navigateBack(), 1000);
-    } catch (e: any) {
-      Taro.showToast({ title: e.message || '录入失败', icon: 'none' });
+    } catch (e: unknown) {
+      const msg = e instanceof Error ? e.message : '录入失败';
+      Taro.showToast({ title: msg, icon: 'none' });
     } finally {
       setSubmitting(false);
     }

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

@@ -23,7 +23,7 @@ export default function Login() {
     }
   };
 
-  const handleGetPhone = async (e: any) => {
+  const handleGetPhone = async (e: { detail: { errMsg: string; encryptedData: string; iv: string } }) => {
     if (e.detail.errMsg !== 'getPhoneNumber:ok') {
       Taro.showToast({ title: '需要授权手机号', icon: 'none' });
       return;

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

@@ -32,7 +32,7 @@ export default function ReportDetail() {
 
   const indicators: IndicatorItem[] = React.useMemo(() => {
     if (!report?.indicators || typeof report.indicators !== 'object') return [];
-    return Object.entries(report.indicators).map(([name, val]: [string, any]) => ({
+    return Object.entries(report.indicators).map(([name, val]) => ({
       name,
       value: val.value,
       unit: val.unit,