feat(app): add lesson-plans, practice, and grade dashboard routes

- Add admin/lesson-plans, parent/lesson-plans, student/lesson-plans routes

- Add student/practice and teacher/practice routes for adaptive practice

- Add management/grade/dashboard and management/grade/practice routes

- Add teacher/lesson-plans error and loading boundaries

- Update existing admin, parent, student, teacher pages with new features

- Update globals.css and proxy middleware

src/app/(dashboard)/student/diagnostic/page.tsx

@@ -1,4 +1,6 @@
 import { Stethoscope } from "lucide-react"
+import { getTranslations } from "next-intl/server"
+
 import { requirePermission } from "@/shared/lib/auth-guard"
 import { Permissions } from "@/shared/types/permissions"
 import { getStudentMasterySummary } from "@/modules/diagnostic/data-access"
@@ -9,6 +11,7 @@ export const dynamic = "force-dynamic"
 
 export default async function StudentDiagnosticPage() {
   const ctx = await requirePermission(Permissions.DIAGNOSTIC_READ)
+  const t = await getTranslations("student")
 
   const [summary, reportsResult] = await Promise.all([
     getStudentMasterySummary(ctx.userId),
@@ -25,10 +28,10 @@ export default async function StudentDiagnosticPage() {
       <div>
         <h2 className="flex items-center gap-2 text-2xl font-bold tracking-tight">
           <Stethoscope className="h-6 w-6" />
-          My Diagnostic
+          {t("diagnostic.title")}
         </h2>
         <p className="text-muted-foreground">
-          Your knowledge point mastery analysis and diagnostic reports.
+          {t("diagnostic.description")}
         </p>
       </div>
       <StudentDiagnosticView summary={summary} reports={reports} />