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/error-book/error.tsx

@@ -1,17 +1,19 @@
 "use client"
 
 import { BookX } from "lucide-react"
+import { useTranslations } from "next-intl"
 
 import { EmptyState } from "@/shared/components/ui/empty-state"
 
 export default function StudentErrorBookError() {
+  const t = useTranslations("student")
   return (
     <div className="p-8">
       <EmptyState
         icon={BookX}
-        title="加载错题本失败"
-        description="发生了一些错误，请刷新页面重试。如果问题持续，请联系管理员。"
-        action={{ label: "刷新页面", onClick: () => window.location.reload() }}
+        title={t("error.title")}
+        description={t("error.description")}
+        action={{ label: t("error.retry"), onClick: () => window.location.reload() }}
         className="border-none shadow-none"
       />
     </div>

src/app/(dashboard)/student/error-book/page.tsx

@@ -1,5 +1,6 @@
 import type { JSX } from "react"
 import { Suspense } from "react"
+import { getTranslations } from "next-intl/server"
 
 import { requirePermission } from "@/shared/lib/auth-guard"
 import { Permissions } from "@/shared/types/permissions"
@@ -92,6 +93,7 @@ export default async function StudentErrorBookPage({
   searchParams: Promise<SearchParams>
 }): Promise<JSX.Element> {
   const ctx = await requirePermission(Permissions.ERROR_BOOK_READ)
+  const t = await getTranslations("student")
   const stats = await getErrorBookStats(ctx.userId)
   const aiClientService = createAiClientService()
 
@@ -100,9 +102,9 @@ export default async function StudentErrorBookPage({
       <div className="flex h-full flex-col space-y-8 p-8">
         <div className="flex flex-col justify-between space-y-4 md:flex-row md:items-center md:space-y-0">
           <div>
-            <h1 className="text-2xl font-bold tracking-tight">错题本</h1>
+            <h1 className="text-2xl font-bold tracking-tight">{t("errorBook.title")}</h1>
             <p className="text-muted-foreground">
-              自动收录考试与作业中的错题，科学复习，攻克薄弱点。
+              {t("errorBook.description")}
             </p>
           </div>
           <div className="flex items-center gap-2">