feat: 添加模型白名单选择器组件，同步 new-api 模型列表

- 新增 ModelWhitelistSelector.vue 支持模型白名单多选
- 新增 ModelIcon.vue 显示品牌图标（基于 @lobehub/icons）
- 新增 useModelWhitelist.ts 硬编码各平台模型列表
- 更新账号编辑表单支持模型白名单配置
- 支持 Claude/OpenAI/Gemini/智谱/百度/讯飞等主流平台

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/package.json

@@ -11,6 +11,7 @@
     "typecheck": "vue-tsc --noEmit"
   },
   "dependencies": {
+    "@lobehub/icons": "^4.0.2",
     "@vueuse/core": "^10.7.0",
     "axios": "^1.6.2",
     "chart.js": "^4.4.1",
@@ -25,6 +26,7 @@
   },
   "devDependencies": {
     "@types/file-saver": "^2.0.7",
+    "@types/mdx": "^2.0.13",
     "@types/node": "^20.10.5",
     "@vitejs/plugin-vue": "^5.2.3",
     "autoprefixer": "^10.4.16",