refactor(mp): 迁移个人中心 12 个页面 — 统一组件库

线下活动、健康档案、报告列表、随访列表、透析记录、
透析处方、诊断列表、用药列表、家庭成员、添加家庭成员、
设置、知情同意共 12 个页面迁移：
- 最外层容器 → PageShell
- SCSS 删除 min-height/background 通用样式

apps/miniprogram/src/pages/pkg-profile/dialysis-prescriptions/index.scss

@@ -1,12 +1,7 @@
 @import '../../../styles/variables.scss';
 @import '../../../styles/mixins.scss';
 
-.dialysis-prescriptions-page {
-  min-height: 100vh;
-  background: $bg;
-  padding: 32px 24px;
-  padding-bottom: 40px;
-}
+// PageShell 已接管：min-height, background, padding
 
 .page-title {
   @include section-title;

apps/miniprogram/src/pages/pkg-profile/dialysis-prescriptions/index.tsx

@@ -8,6 +8,7 @@ import type { DialysisPrescription } from '@/services/dialysis';
 import EmptyState from '@/components/EmptyState';
 import Loading from '@/components/Loading';
 import { useElderClass } from '../../../hooks/useElderClass';
+import PageShell from '@/components/ui/PageShell';
 import './index.scss';
 
 const STATUS_MAP: Record<string, { label: string; cls: string }> = {
@@ -57,7 +58,7 @@ export default function DialysisPrescriptionList() {
   const statusInfo = (s: string) => STATUS_MAP[s] || { label: s, cls: '' };
 
   return (
-    <View className={`dialysis-prescriptions-page ${modeClass}`}>
+    <PageShell className={modeClass}>
       <Text className='page-title'>透析处方</Text>
 
       <View className='prescription-list'>
@@ -96,6 +97,6 @@ export default function DialysisPrescriptionList() {
       )}
 
       {loading && <Loading />}
-    </View>
+    </PageShell>
   );
 }