refactor(modules): update classes, course-plans, diagnostic, questions, settings, student, layout

- Update classes data-access (invitations, main) for invitation management

- Update course-plans actions, data-access, and types

- Update diagnostic data-access for report queries

- Update questions data-access for question bank queries

- Update settings actions, ai-provider-settings-card, data-access, and types

- Update student course-filters, student-courses-view, student-schedule-filters, student-schedule-view

- Update layout app-sidebar, site-header, and navigation config

src/modules/layout/components/site-header.tsx

@@ -5,6 +5,7 @@ import Link from "next/link"
 import { usePathname } from "next/navigation"
 import { Menu } from "lucide-react"
 import { signOut, useSession } from "next-auth/react"
+import { useTranslations } from "next-intl"
 
 import { Button } from "@/shared/components/ui/button"
 import { Separator } from "@/shared/components/ui/separator"
@@ -31,7 +32,7 @@ import { NotificationDropdown } from "@/modules/notifications/components/notific
 import { useSidebar } from "./sidebar-provider"
 import { NAV_CONFIG } from "../config/navigation"
 
-// Build lookup map for breadcrumbs
+// Build lookup map for breadcrumbs: href → i18n key
 const BREADCRUMB_MAP = new Map<string, string>()
 Object.values(NAV_CONFIG).forEach((items) => {
   items?.forEach((item) => {
@@ -46,10 +47,12 @@ export function SiteHeader() {
   const pathname = usePathname()
   const { toggleSidebar, isMobile } = useSidebar()
   const { data: session, status } = useSession()
+  const tNav = useTranslations("nav")
+  const tCommon = useTranslations("common")
 
   const name = session?.user?.name ?? ""
   const email = session?.user?.email ?? ""
-  const displayName = name || email || (status === "loading" ? "加载中..." : "未登录")
+  const displayName = name || email || (status === "loading" ? tCommon("user.loading") : tCommon("user.notLoggedIn"))
 
   const fallbackBase = name || email || "?"
   const avatarFallback = fallbackBase
@@ -65,7 +68,10 @@ export function SiteHeader() {
   const breadcrumbs = segments
     .map((segment, index) => {
       const href = `/${segments.slice(0, index + 1).join("/")}`
-      const title = BREADCRUMB_MAP.get(href) || segment.charAt(0).toUpperCase() + segment.slice(1)
+      const titleKey = BREADCRUMB_MAP.get(href)
+      const title = titleKey
+        ? tNav(titleKey)
+        : segment.charAt(0).toUpperCase() + segment.slice(1)
       return { href, title, isLast: index === segments.length - 1, isRole: roleSegments.has(segment.toLowerCase()) }
     })
     .filter((b, idx) => {
@@ -83,7 +89,7 @@ export function SiteHeader() {
         {isMobile && (
           <Button variant="ghost" size="icon" onClick={toggleSidebar} className="mr-2">
             <Menu className="size-5" />
-            <span className="sr-only">Toggle Sidebar</span>
+            <span className="sr-only">{tCommon("sidebar.toggleSidebar")}</span>
           </Button>
         )}
 
@@ -109,7 +115,7 @@ export function SiteHeader() {
               ))
             ) : (
               <BreadcrumbItem>
-                <BreadcrumbPage>Home</BreadcrumbPage>
+                <BreadcrumbPage>{tCommon("breadcrumb.home")}</BreadcrumbPage>
               </BreadcrumbItem>
             )}
           </BreadcrumbList>
@@ -143,10 +149,10 @@ export function SiteHeader() {
                 </DropdownMenuLabel>
                 <DropdownMenuSeparator />
                 <DropdownMenuItem asChild>
-                  <Link href="/profile">Profile</Link>
+                  <Link href="/profile">{tCommon("user.profile")}</Link>
                 </DropdownMenuItem>
                 <DropdownMenuItem asChild>
-                  <Link href="/settings">Settings</Link>
+                  <Link href="/settings">{tCommon("user.settings")}</Link>
                 </DropdownMenuItem>
                 <DropdownMenuSeparator />
                 <DropdownMenuItem
@@ -156,7 +162,7 @@ export function SiteHeader() {
                     signOut({ callbackUrl: "/login" })
                   }}
                 >
-                    Log out
+                    {tCommon("user.logout")}
                 </DropdownMenuItem>
             </DropdownMenuContent>
         </DropdownMenu>