refactor: update env configs, replace uni-ui and fix issues

- add VITE_CLIENT_ID environment variable to all .env files, adjust API and socket URLs across dev/staging/prod environments
- update request utility to use env var for client ID instead of hardcoded "6"
- refactor GoodDetail component: replace uni-icons with van-icon, switch markdown renderer to vue3-markdown-it
- refactor Calendar component: swap uni-popup for van-popup, remove deprecated SCSS styles, update markup and toast calls
- fix ImageSwiper: rename handler methods, update preview navigation to use vue router, remove redundant code
- correct margin class syntax in goods index page

.env.staging

@@ -2,10 +2,13 @@
 VITE_APP_ENV = 'staging'
 
 # API 基础 URL
-VITE_API_BASE_URL = 'https://onefeel.brother7.cn/ingress'
+VITE_API_BASE_URL = 'https://abroadbiz.nianxx.com/ingress'
 
 # API 请求超时时间（毫秒）
 VITE_API_TIMEOUT_MS = 10000
 
 # Socket 基础 URL
-VITE_SOCKET_BASE_URL = "wss://onefeel.brother7.cn/ingress/agent/ws/chat"
+VITE_SOCKET_BASE_URL = "wss://abroadbiz.nianxx.com/ingress/agent/ws/chat"
+
+# Client ID
+VITE_CLIENT_ID = "12"