fix: remove all medical device terms from user-facing text

Replace '光子美容仪' with '智美'/'智能面膜'/'我的设备' throughout.
Replace '护理' with '使用' in all UI text.
Replace '皮肤' with '检测'/'智能' where applicable.
Replace 🌸 with 💎 for brand identity.
Internal code (variable names, API paths, file names) unchanged.

admin-console/src/components/AdminLayout.vue

@@ -1,7 +1,7 @@
 <template>
   <view class="admin-layout">
     <view class="sidebar">
-      <view class="sidebar-logo">🌸 光子美容仪</view>
+      <view class="sidebar-logo">💎 智美</view>
       <view class="sidebar-sub">管理后台</view>
       <view class="sidebar-menu">
         <view
@@ -45,7 +45,7 @@ export default {
         { icon: '📱', label: '设备管理', view: 'device' },
         { icon: '👥', label: '用户管理', view: 'user' },
         { icon: '💳', label: '订阅管理', view: 'subscription' },
-        { icon: '📋', label: '护理记录', view: 'record' },
+        { icon: '📋', label: '使用记录', view: 'record' },
         { icon: '📝', label: '操作日志', view: 'log' },
         { icon: '⚙️', label: '系统设置', view: 'settings' }
       ]
@@ -54,7 +54,7 @@ export default {
   computed: {
     pageTitle() {
       var item = this.menuItems.find(m => m.view === this.currentPage)
-      return item ? item.icon + ' ' + item.label : '光子美容仪管理后台'
+      return item ? item.icon + ' ' + item.label : '智美管理后台'
     },
     adminName() {
       var store = useUserStore()