Align console UI with school-iot-admin and wire login to serverschool

UI / layout
- rebuild left mode: full-width blue header (60px) + white sidebar below + card-style tags view
- introduce design tokens in variables.css (brand #347df9, sidebar 240px, menu item 49px)
  and theme overrides for dark / dark-blue themes
- restyle navigation bar (logo + platform name / top nav / tools + user), logo, sidebar
  (selected state: light blue bg + blue bar + bold), tags view, app main
- global styles: .app-container white card, .head-title, .btn-blue/.btn-white,
  el-table / el-dialog look, brand color injected into --el-color-primary
- add favorites store (localStorage) wired to sidebar star and header top nav
- disable template watermark / footer / promo notifications by default

Login (serverschool)
- port school-iot-admin login page (background art, right side card, keep-login)
- OAuth2 password mode: GET /oauth/token (raw axios) + GET /uc/account/current
- port phone lookup (/wx/getAccoutList) and forget-password flow
  (/sms/sendCode + /sms/verifyCode) as components/login/Forget.vue
- user store exposes accountInfo / accountType / teamId / roleId and strips password

Infra
- move all devServer proxies and env vars from school-iot-admin/vue.config.js
  (default targets point to production)
- fix empty sidebar: guard short-circuit skipped setRoutes when login page already
  fetched user info

.env.development

@@ -1,7 +1,24 @@
 # 开发环境的环境变量（命名必须以 VITE_ 开头）
 
-## 后端接口地址（如果解决跨域问题采用反向代理就只需写相对路径）
+## 后端接口地址（apifoxmock，demo / FastCrud 演示页用）
 VITE_BASE_URL = /api/v1
 
 ## 开发环境域名和静态资源公共路径（一般 / 或 ./ 都可以）
 VITE_PUBLIC_PATH = /
+
+# ===== serverschool 后端代理（默认连生产，与 school-iot-admin 的 dev 一致） =====
+
+## /hxyd-api 代理目标；连测试库改成 http://192.168.0.10:8100
+VITE_SCHOOL_TARGET = https://band.hxzhxy.cn
+
+## WebSocket（/ws-api）；老平台 dev 内网值 ws://192.168.0.244:58089
+VITE_WS_TARGET = ws://139.159.182.121:8100
+
+## 视频流 wvp（/hxyd-video）；老平台 dev 内网值 http://10.19.64.250:8000
+VITE_VIDEO_TARGET = http://11.1.20.107:8000
+
+## yolo 抓拍图片 minio（/hxyd-video/yolo）；老平台 dev 内网值 http://10.19.64.250:9000
+VITE_VIDEO_MINIO = http://11.1.20.107:9000
+
+## 智能体对话（/agent-dialogue-api，本机 score_agent / LangGraph）
+VITE_AGENT_DIALOGUE_TARGET = http://127.0.0.1:3030