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/appointment/create/index.vue

@@ -0,0 +1,146 @@
+<template>
+  <scroll-view scroll-y class="page-scroll">
+    <view class="page-content">
+      <text class="page-title">新建预约</text>
+
+      <view class="form-group">
+        <text class="form-label">选择医生</text>
+        <picker :range="doctorNames" @change="onDoctorChange">
+          <view class="form-picker">
+            {{ selectedDoctorName || '请选择医生' }}
+            <text class="picker-arrow">▼</text>
+          </view>
+        </picker>
+      </view>
+
+      <view class="form-group">
+        <text class="form-label">预约日期</text>
+        <picker mode="date" :value="date" @change="(e: any) => date = e.detail.value">
+          <view class="form-picker">
+            {{ date || '请选择日期' }}
+            <text class="picker-arrow">▼</text>
+          </view>
+        </picker>
+      </view>
+
+      <view class="form-group">
+        <text class="form-label">预约时间</text>
+        <picker mode="time" :value="time" @change="(e: any) => time = e.detail.value">
+          <view class="form-picker">
+            {{ time || '请选择时间' }}
+            <text class="picker-arrow">▼</text>
+          </view>
+        </picker>
+      </view>
+
+      <view class="form-group">
+        <text class="form-label">备注</text>
+        <textarea v-model="notes" class="form-textarea" placeholder="请输入备注信息" />
+      </view>
+
+      <view class="submit-btn" @tap="handleSubmit">
+        {{ submitting ? '提交中...' : '提交预约' }}
+      </view>
+    </view>
+  </scroll-view>
+</template>
+
+<script setup lang="ts">
+import { ref, computed, onMounted } from 'vue'
+import { api } from '@/services/request'
+
+const doctors = ref<any[]>([])
+const selectedDoctorIdx = ref(-1)
+const date = ref('')
+const time = ref('')
+const notes = ref('')
+const submitting = ref(false)
+
+const doctorNames = computed(() => doctors.value.map(d => d.name || d.display_name || '医生'))
+const selectedDoctorName = computed(() => selectedDoctorIdx.value >= 0 ? doctorNames.value[selectedDoctorIdx.value] : '')
+
+function onDoctorChange(e: any) {
+  selectedDoctorIdx.value = e.detail.value
+}
+
+async function fetchDoctors() {
+  try { doctors.value = await api.get<any[]>('/health/doctors') || [] }
+  catch { doctors.value = [] }
+}
+
+async function handleSubmit() {
+  if (selectedDoctorIdx.value < 0) {
+    uni.showToast({ title: '请选择医生', icon: 'none' })
+    return
+  }
+  if (!date.value || !time.value) {
+    uni.showToast({ title: '请选择日期和时间', icon: 'none' })
+    return
+  }
+  submitting.value = true
+  try {
+    await api.post('/health/appointments', {
+      doctor_id: doctors.value[selectedDoctorIdx.value].id,
+      appointment_time: `${date.value} ${time.value}`,
+      notes: notes.value,
+    })
+    uni.showToast({ title: '预约成功', icon: 'success' })
+    setTimeout(() => uni.navigateBack(), 1500)
+  } catch (err: any) {
+    uni.showToast({ title: err.message || '预约失败', icon: 'none' })
+  }
+  submitting.value = false
+}
+
+onMounted(fetchDoctors)
+</script>
+
+<style lang="scss" scoped>
+.page-scroll { height: 100vh; background: $bg; }
+.page-content { padding: 28px 24px 120px; }
+.page-title { @include section-title; }
+
+.form-group {
+  margin-bottom: 28px;
+}
+
+.form-label {
+  display: block;
+  font-size: var(--tk-font-body);
+  color: $tx2;
+  margin-bottom: 12px;
+}
+
+.form-picker {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  background: $card;
+  border-radius: $r-sm;
+  padding: 18px 20px;
+  font-size: var(--tk-font-body);
+  color: $tx;
+  box-shadow: $shadow-sm;
+}
+
+.picker-arrow {
+  font-size: var(--tk-font-cap);
+  color: $tx3;
+}
+
+.form-textarea {
+  width: 100%;
+  min-height: 160px;
+  background: $card;
+  border-radius: $r-sm;
+  padding: 18px 20px;
+  font-size: var(--tk-font-body);
+  color: $tx;
+  box-sizing: border-box;
+}
+
+.submit-btn {
+  @include btn-primary;
+  margin-top: 16px;
+}
+</style>