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/student/components/student-courses-view.tsx

@@ -4,6 +4,7 @@ import Link from "next/link"
 import { memo, useState, useTransition } from "react"
 import { useRouter } from "next/navigation"
 import { toast } from "sonner"
+import { useTranslations } from "next-intl"
 
 import { Card, CardContent, CardHeader, CardTitle, CardDescription, CardFooter } from "@/shared/components/ui/card"
 import { Badge } from "@/shared/components/ui/badge"
@@ -17,6 +18,7 @@ import type { StudentEnrolledClass } from "@/modules/classes/types"
 import { joinClassByInvitationCodeAction } from "@/modules/classes/actions"
 
 const ClassCard = memo(function ClassCard({ c }: { c: StudentEnrolledClass }) {
+  const t = useTranslations("student")
   return (
     <Card className="flex flex-col overflow-hidden transition-all hover:shadow-md">
       <CardHeader className="bg-muted/30 pb-4">
@@ -30,7 +32,7 @@ const ClassCard = memo(function ClassCard({ c }: { c: StudentEnrolledClass }) {
             <CardDescription className="flex items-center gap-2 text-xs">
               <span className="flex items-center gap-1">
                 <BookOpen className="h-3 w-3" />
-                Grade {c.grade}
+                {t("coursesView.grade", { grade: c.grade })}
               </span>
               {c.homeroom && (
                 <>
@@ -41,7 +43,7 @@ const ClassCard = memo(function ClassCard({ c }: { c: StudentEnrolledClass }) {
             </CardDescription>
           </div>
           <Badge variant="secondary" className="shrink-0">
-            Active
+            {t("coursesView.active")}
           </Badge>
         </div>
       </CardHeader>
@@ -71,7 +73,7 @@ const ClassCard = memo(function ClassCard({ c }: { c: StudentEnrolledClass }) {
           {c.room && (
             <div className="flex items-center gap-2 text-muted-foreground">
               <Building2 className="h-4 w-4" />
-              <span>Room {c.room}</span>
+              <span>{t("coursesView.room", { room: c.room })}</span>
             </div>
           )}
         </div>
@@ -81,19 +83,19 @@ const ClassCard = memo(function ClassCard({ c }: { c: StudentEnrolledClass }) {
         <Button asChild variant="outline" size="sm" className="flex-1">
           <Link href={`/student/learning/courses/${encodeURIComponent(c.id)}`}>
             <BookOpen className="mr-2 h-4 w-4" />
-            Details
+            {t("coursesView.details")}
           </Link>
         </Button>
         <Button asChild variant="outline" size="sm" className="flex-1">
           <Link href={`/student/schedule?classId=${encodeURIComponent(c.id)}`}>
             <CalendarDays className="mr-2 h-4 w-4" />
-            Schedule
+            {t("coursesView.schedule")}
           </Link>
         </Button>
         <Button asChild size="sm" className="flex-1">
           <Link href="/student/learning/assignments">
             <PenTool className="mr-2 h-4 w-4" />
-            Assignments
+            {t("coursesView.assignments")}
           </Link>
         </Button>
       </CardFooter>
@@ -106,6 +108,7 @@ export function StudentCoursesView({
 }: {
   classes: StudentEnrolledClass[]
 }) {
+  const t = useTranslations("student")
   const router = useRouter()
   const [code, setCode] = useState("")
   const [isPending, startTransition] = useTransition()
@@ -115,15 +118,15 @@ export function StudentCoursesView({
       try {
         const res = await joinClassByInvitationCodeAction(null, formData)
         if (res.success) {
-          toast.success(res.message || "Joined class")
+          toast.success(res.message || t("coursesView.joinedSuccess"))
           setCode("")
           router.refresh()
         } else {
-          toast.error(res.message || "Failed to join class")
+          toast.error(res.message || t("coursesView.joinFailed"))
         }
       } catch (err) {
         console.error("[joinClass] failed:", err)
-        toast.error("Failed to join class")
+        toast.error(t("coursesView.joinFailed"))
       }
     })
   }
@@ -141,8 +144,8 @@ export function StudentCoursesView({
       {classes.length === 0 && (
         <EmptyState
           icon={Inbox}
-          title="No courses yet"
-          description="You are not enrolled in any classes. Join a class below to get started."
+          title={t("coursesView.noCourses")}
+          description={t("coursesView.noCoursesDesc")}
           className="py-12"
         />
       )}
@@ -155,9 +158,9 @@ export function StudentCoursesView({
               <PlusCircle className="h-5 w-5 text-primary" />
             </div>
             <div>
-              <h3 className="text-lg font-semibold">Join a Class</h3>
+              <h3 className="text-lg font-semibold">{t("coursesView.joinClass")}</h3>
               <p className="text-sm text-muted-foreground">
-                Enter the invitation code provided by your teacher to enroll.
+                {t("coursesView.joinClassDesc")}
               </p>
             </div>
           </div>
@@ -165,13 +168,13 @@ export function StudentCoursesView({
 
         <form action={handleJoin} className="flex flex-col gap-4 sm:flex-row sm:items-end">
           <div className="flex-1 space-y-2">
-            <Label htmlFor="join-invitation-code">Invitation Code</Label>
+            <Label htmlFor="join-invitation-code">{t("coursesView.invitationCode")}</Label>
             <Input
               id="join-invitation-code"
               name="code"
               inputMode="numeric"
               autoComplete="one-time-code"
-              placeholder="Enter 6-digit code"
+              placeholder={t("coursesView.invitationCodePlaceholder")}
               value={code}
               onChange={(e) => setCode(e.target.value)}
               maxLength={6}
@@ -181,7 +184,7 @@ export function StudentCoursesView({
             />
           </div>
           <Button type="submit" disabled={isPending} size="lg">
-            {isPending ? "Joining..." : "Join Class"}
+            {isPending ? t("coursesView.joining") : t("coursesView.joinButton")}
           </Button>
         </form>
       </div>