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)/admin/ai-settings/page.tsx

@@ -1,14 +1,18 @@
 import type { Metadata } from "next"
 import type { JSX } from "react"
+import { getTranslations } from "next-intl/server"
 
 import { requirePermission } from "@/shared/lib/auth-guard"
 import { Permissions } from "@/shared/types/permissions"
 import { AiProviderSettingsCard } from "@/modules/settings/components/ai-provider-settings-card"
 import { AiUsageDashboard } from "@/modules/ai/components/ai-usage-dashboard"
 
-export const metadata: Metadata = {
-  title: "AI 配置 - Next_Edu",
-  description: "统一管理 AI 服务商、API 密钥与使用统计",
+export async function generateMetadata(): Promise<Metadata> {
+  const t = await getTranslations("ai")
+  return {
+    title: `${t("admin.settings.title")} - Next_Edu`,
+    description: t("admin.settings.description"),
+  }
 }
 
 export const dynamic = "force-dynamic"
@@ -18,25 +22,31 @@ export const dynamic = "force-dynamic"
  *
  * 作为 AI 模块的独立配置入口，取代：
  * - /settings?tab=ai（已移除 AI 标签页）
- * - 考试页面内嵌的 AI 配置弹窗（已改为跳转链接）
+ * - 考试页面内嵌的 AI 配置弹窗（已移除）
  *
- * 权限：AI_CONFIGURE（当前仅 admin 角色拥有）
+ * 权限规则：
+ *   - AI_CHAT 用户均可访问（管理自己的 private provider）
+ *   - AI_CONFIGURE 用户（管理员）可额外管理 public provider 与他人 private provider
  */
 export default async function AiSettingsPage(): Promise<JSX.Element> {
-  await requirePermission(Permissions.AI_CONFIGURE)
+  const t = await getTranslations("ai")
+  const ctx = await requirePermission(Permissions.AI_CHAT)
+  const isAdmin = ctx.permissions.includes(Permissions.AI_CONFIGURE)
   return (
     <div className="flex h-full flex-col gap-8 p-8">
       <div className="flex flex-col justify-between gap-4 md:flex-row md:items-center">
         <div className="space-y-1">
-          <h1 className="text-3xl font-bold tracking-tight">AI 配置</h1>
+          <h1 className="text-3xl font-bold tracking-tight">{t("admin.settings.title")}</h1>
           <div className="text-sm text-muted-foreground">
-            统一管理 AI 服务商、API 密钥与使用统计
+            {isAdmin
+              ? t("admin.settings.description")
+              : t("admin.settings.userDescription")}
           </div>
         </div>
       </div>
       <div className="space-y-6">
-        <AiProviderSettingsCard />
-        <AiUsageDashboard />
+        <AiProviderSettingsCard isAdmin={isAdmin} currentUserId={ctx.userId} />
+        {isAdmin ? <AiUsageDashboard /> : null}
       </div>
     </div>
   )