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)/parent/error.tsx

@@ -2,6 +2,7 @@
 
 import { EmptyState } from "@/shared/components/ui/empty-state"
 import { AlertTriangle } from "lucide-react"
+import { useTranslations } from "next-intl"
 
 export default function ParentError({
   error,
@@ -10,13 +11,15 @@ export default function ParentError({
   error: Error & { digest?: string }
   reset: () => void
 }) {
+  const t = useTranslations("common")
+
   return (
     <div className="p-6 md:p-8">
       <EmptyState
         icon={AlertTriangle}
-        title="Something went wrong"
+        title={t("somethingWentWrong")}
         description={error.message || "An unexpected error occurred. Please try again."}
-        action={{ label: "Try again", onClick: reset }}
+        action={{ label: t("tryAgain"), onClick: reset }}
       />
     </div>
   )