feat: 用户与权限管理

新增 PermissionCode 权限类型与用户/权限 API，路由注册用户设置/创建/权限页与无权访问页并接入权限守卫，AppSidebar 按权限过滤菜单并新增用户设置入口，auth store 与 mock 适配器同步支持用户管理与新登录认证，回归脚本与 npm 脚本注册。

frontend/package.json

@@ -9,6 +9,7 @@
     "preview": "vite preview",
     "type-check": "vue-tsc -b --noEmit",
     "test": "node scripts/run-regressions.mjs",
+    "test:login-layout": "node scripts/regression-login-layout.mjs",
     "test:default-dashboard": "node scripts/regression-default-dashboard.mjs",
     "test:dashboard": "node scripts/regression-dashboard.mjs",
     "test:data-process-list": "node scripts/regression-data-process-list.mjs",
@@ -21,6 +22,7 @@
     "test:eval-detail": "node scripts/regression-eval-detail.mjs",
     "test:model-manage": "node scripts/regression-model-manage.mjs",
     "test:hardware": "node scripts/regression-hardware-dashboard.mjs",
+    "test:user-settings": "node scripts/regression-user-settings.mjs",
     "test:training-log-layout": "node scripts/regression-training-log-layout.mjs",
     "test:fine-tune-create": "node scripts/regression-fine-tune-create-ui.mjs",
     "test:page-surface": "node scripts/regression-page-surface.mjs"