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/manifest.json

@@ -1,11 +1,11 @@
 {
-  "name": "光子美容仪后台",
+  "name": "智美后台",
   "appid": "__UNI__HOXADMIN",
   "description": "Hox beauty device admin console",
   "versionName": "1.0.0",
   "versionCode": "100",
   "h5": {
-    "title": "光子美容仪后台",
+    "title": "智美后台",
     "router": {
       "mode": "hash",
       "base": "/admin/"