fix(mp): T40 UI 审查全量修复 + 设计体系一致性优化

Phase 0 基础设施:
- statusTag.ts: getStatusInlineStyle() 移除内联 borderRadius/padding/fontSize，仅返回 {background, color}
- 新增 SEVERITY_COLORS + getSeverityStyle() + getSeverityLabel() 统一告警严重程度样式
- variables.scss: 新增 9 个语义颜色别名 ($success/$danger/$warning/$info 等)
- mixins.scss: 新增 status-inline mixin 统一状态标签样式
- 7 个消费者页面添加 @include status-inline CSS 补偿

Phase 1 HIGH 修复 (4 页面):
- P46 随访管理: 移除 getTypeStyle() 硬编码 fontSize，替换文字 Loading 为组件
- P45 咨询详情医护: 添加 Loading/ErrorState 三态模板 + error ref
- P02 健康数据: 添加 loading ref + Loading 组件 + 错误 toast 提示
- P48 告警中心: 替换本地 SEVERITY_COLORS/SEVERITY_LABELS 为 statusTag.ts 导出

Phase 2 全局一致性:
- 2.1 触控补全: 17 页面为可点击元素添加 min-height: $touch-min
- 2.2 字号替换: 19 文件 31 处硬编码 px → Design Token CSS 变量
- 2.3 颜色替换: 18 文件 ~50 处硬编码十六进制 → SCSS 语义变量
- 2.4 elder-mode.scss: 新增 9 个选择器到触控放大清单

Phase 3 LOW 修复:
- 3.1 统一 Loading: 21 页面旧式文字加载 → <Loading> 组件
- 3.2 useElderClass: 8 页面补全长者模式 class 绑定
- 3.3 零散修复: 按钮 44px→48px，诊断记录添加 scroll-view 无限加载

同时新增 UniApp (Vue 3 + Vite) 小程序完整代码库 (146 文件)

apps/miniprogram-uniapp/src/pages-sub/pkg-profile/elder-mode/index.vue

@@ -0,0 +1,191 @@
+<template>
+  <scroll-view scroll-y class="page-scroll">
+    <view :class="['elder-mode-page', elderClass]">
+      <view class="elder-mode-card">
+        <view class="elder-mode-header">
+          <text class="elder-mode-icon">老</text>
+          <view class="elder-mode-info">
+            <text class="elder-mode-title">长辈模式</text>
+            <text class="elder-mode-desc">放大字体和按钮，更易阅读和操作</text>
+          </view>
+        </view>
+
+        <view class="elder-mode-status">
+          <text class="elder-mode-status-text">
+            当前状态：{{ uiStore.elderMode ? '已开启' : '已关闭' }}
+          </text>
+          <view
+            :class="['elder-mode-switch', { 'elder-mode-switch--on': uiStore.elderMode }]"
+            @tap="handleToggle"
+          >
+            <view class="elder-mode-switch-thumb" />
+          </view>
+        </view>
+      </view>
+
+      <view class="elder-mode-preview">
+        <text class="elder-mode-preview-title">效果预览</text>
+        <view class="elder-mode-preview-card">
+          <text :class="['elder-mode-preview-sample', { 'elder-mode-preview-sample--large': uiStore.elderMode }]">
+            {{ uiStore.elderMode ? '长辈模式字体示例' : '标准模式字体示例' }}
+          </text>
+          <text class="elder-mode-preview-note">
+            {{ uiStore.elderMode ? '字号放大 1.3 倍，间距放大 1.2 倍' : '正常字号和间距' }}
+          </text>
+        </view>
+      </view>
+    </view>
+  </scroll-view>
+</template>
+
+<script setup lang="ts">
+import { useUIStore } from '@/stores/ui'
+import { useElderClass } from '@/composables/useElderClass'
+
+const uiStore = useUIStore()
+const { elderClass } = useElderClass()
+
+function handleToggle() {
+  uiStore.toggleElderMode()
+  uni.showToast({
+    title: uiStore.elderMode ? '已开启长辈模式' : '已关闭长辈模式',
+    icon: 'none',
+    duration: 1500,
+  })
+}
+</script>
+
+<style lang="scss" scoped>
+.page-scroll {
+  height: 100vh;
+  background: $bg;
+}
+
+.elder-mode-page {
+  padding: 24px;
+}
+
+.elder-mode-card {
+  background: $card;
+  border-radius: $r;
+  padding: 24px;
+  box-shadow: $shadow-md;
+  margin-bottom: 20px;
+}
+
+.elder-mode-header {
+  display: flex;
+  align-items: center;
+  gap: 16px;
+  margin-bottom: 20px;
+}
+
+.elder-mode-icon {
+  width: 48px;
+  height: 48px;
+  border-radius: $r-sm;
+  background: $acc-l;
+  @include flex-center;
+  font-size: var(--tk-font-body);
+  font-weight: 700;
+  color: $acc;
+  flex-shrink: 0;
+}
+
+.elder-mode-info {
+  flex: 1;
+}
+
+.elder-mode-title {
+  font-size: var(--tk-font-body-sm);
+  font-weight: 700;
+  color: $tx;
+  display: block;
+  margin-bottom: 4px;
+}
+
+.elder-mode-desc {
+  font-size: var(--tk-font-cap);
+  color: var(--tk-text-secondary);
+}
+
+.elder-mode-status {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 16px 0 0;
+  border-top: 1px solid $bd-l;
+}
+
+.elder-mode-status-text {
+  font-size: var(--tk-font-cap);
+  color: $tx2;
+}
+
+.elder-mode-switch {
+  width: 52px;
+  height: 30px;
+  border-radius: $r-pill;
+  background: $bd;
+  position: relative;
+  transition: background 0.25s;
+  transition: background 0.25s;
+
+  &--on {
+    background: $acc;
+  }
+}
+
+.elder-mode-switch-thumb {
+  width: 26px;
+  height: 26px;
+  border-radius: $r-pill;
+  background: $card;
+  position: absolute;
+  top: 2px;
+  left: 2px;
+  transition: transform 0.25s;
+  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
+
+  .elder-mode-switch--on & {
+    transform: translateX(22px);
+  }
+}
+
+.elder-mode-preview {
+  margin-top: 4px;
+}
+
+.elder-mode-preview-title {
+  font-size: var(--tk-font-cap);
+  font-weight: 600;
+  color: $tx2;
+  display: block;
+  margin-bottom: 10px;
+  padding-left: 4px;
+}
+
+.elder-mode-preview-card {
+  background: $card;
+  border-radius: $r;
+  padding: 20px;
+  box-shadow: $shadow-sm;
+}
+
+.elder-mode-preview-sample {
+  font-size: var(--tk-font-body-sm);
+  color: $tx;
+  display: block;
+  margin-bottom: 8px;
+  transition: font-size 0.25s;
+
+  &--large {
+    font-size: var(--tk-font-body);
+  }
+}
+
+.elder-mode-preview-note {
+  font-size: var(--tk-font-cap);
+  color: var(--tk-text-secondary);
+}
+</style>