refactor(modules): update existing module implementations across attendance, audit, auth, classes, course-plans, exams, files, homework, layout, proctoring, questions, scheduling, textbooks, users

- Update attendance components and data-access for record management

- Update audit log views, filters, and data-access

- Update auth login and register forms

- Update classes actions, components, and data-access (admin, schedule, stats)

- Update course-plans actions, form, list, progress, and schema

- Update exams actions, AI pipeline, preview components, and hooks

- Update files components (icon, list, preview, upload) and data-access

- Update homework assignment form, review view, auto-save hook, and stats-service

- Update layout sidebar, header, and navigation config

- Update proctoring actions, anti-cheat monitor, and data-access

- Update questions actions, components (dialog, actions, columns, filters), and data-access

- Update scheduling actions, auto-scheduler, components, and schema

- Update textbooks constants and text-selection hook

- Update users class-registration, import-dialog, data-access, and user-service

src/modules/layout/components/app-sidebar.tsx

@@ -11,13 +11,6 @@ import {
   CollapsibleTrigger,
 } from "@/shared/components/ui/collapsible"
 import { ScrollArea } from "@/shared/components/ui/scroll-area"
-import {
-  Select,
-  SelectContent,
-  SelectItem,
-  SelectTrigger,
-  SelectValue,
-} from "@/shared/components/ui/select"
 import {
   Tooltip,
   TooltipContent,
@@ -35,11 +28,13 @@ interface AppSidebarProps {
 }
 
 export function AppSidebar({ mode }: AppSidebarProps) {
-  const { expanded, toggleSidebar, isMobile, currentRole, setCurrentRole } = useSidebar()
+  const { expanded, toggleSidebar, isMobile } = useSidebar()
   const pathname = usePathname()
-  const { permissions, roles, hasRole } = usePermission()
+  const { permissions, hasRole } = usePermission()
 
   // 自动检测当前角色（优先级 admin > student > parent > teacher）
+  // 注意：grade_head / teaching_head 统一归入 teacher，因为 teacher 导航已通过
+  // 权限点（GRADE_MANAGE 等）动态显示班主任专属功能，无需切换角色。
   function detectAutoRole(): Role {
     if (hasRole("admin")) return "admin"
     if (hasRole("student")) return "student"
@@ -47,14 +42,7 @@ export function AppSidebar({ mode }: AppSidebarProps) {
     return "teacher"
   }
 
-  // 用户在 NAV_CONFIG 中实际可用的角色（过滤掉未配置的角色）
-  const availableRoles = roles.filter((r) => NAV_CONFIG[r] !== undefined)
-
-  // 如果 context 中有 currentRole 且用户拥有该角色，使用 currentRole；否则自动检测
-  const effectiveRole: Role =
-    currentRole !== null && availableRoles.includes(currentRole)
-      ? currentRole
-      : detectAutoRole()
+  const effectiveRole: Role = detectAutoRole()
 
   const allNavItems = NAV_CONFIG[effectiveRole] ?? NAV_CONFIG.teacher ?? []
 
@@ -71,7 +59,7 @@ export function AppSidebar({ mode }: AppSidebarProps) {
   }))
 
   // Ensure consistent state for hydration
-  if (!expanded && mode === 'mobile') return null 
+  if (!expanded && mode === 'mobile') return null
 
   return (
     <div className="flex h-full flex-col gap-4">
@@ -179,26 +167,12 @@ export function AppSidebar({ mode }: AppSidebarProps) {
 
       {/* Sidebar Footer */}
       <div className="p-4">
-        {availableRoles.length > 1 && (expanded || isMobile) && (
-          <div className="px-2 pb-2">
-            <Select value={effectiveRole} onValueChange={(v) => setCurrentRole(v as Role)}>
-              <SelectTrigger className="w-full">
-                <SelectValue placeholder="切换角色" />
-              </SelectTrigger>
-              <SelectContent>
-                {availableRoles.map((r) => (
-                  <SelectItem key={r} value={r}>{r}</SelectItem>
-                ))}
-              </SelectContent>
-            </Select>
-          </div>
-        )}
         {!isMobile && (
            <button
              onClick={toggleSidebar}
              className="hover:bg-sidebar-accent text-sidebar-foreground flex w-full items-center justify-center rounded-md border p-2 text-sm transition-colors"
            >
-              {expanded ? "收起" : <ChevronRight className="size-4" />}
+             {expanded ? "收起" : <ChevronRight className="size-4" />}
            </button>
         )}
       </div>