feat: rebrand to LumiFlow across miniprogram, admin-console, and server

admin-console/src/pages/login/index.vue

@@ -2,7 +2,7 @@
   <view class="login-page">
     <view class="login-card">
       <view class="login-logo">💎</view>
-      <view class="login-title">智美</view>
+      <view class="login-title">LumiFlow</view>
       <view class="login-subtitle">管理后台</view>
 
       <view class="form-group">
@@ -32,7 +32,7 @@
         登 录
       </button>
 
-      <view class="login-footer">© 2026 智美管理后台</view>
+      <view class="login-footer">© 2026 LumiFlow</view>
     </view>
   </view>
 </template>