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)/teacher/practice/error.tsx

@@ -0,0 +1,27 @@
+"use client"
+
+import { useEffect } from "react"
+import { BarChart3 } from "lucide-react"
+
+import { EmptyState } from "@/shared/components/ui/empty-state"
+
+export default function Error() {
+  useEffect(() => {
+    console.error("Practice analytics page error")
+  }, [])
+
+  return (
+    <div className="flex h-full flex-col space-y-8 p-8">
+      <div>
+        <h1 className="text-2xl font-bold tracking-tight">专项练习分析</h1>
+        <p className="text-muted-foreground">加载练习分析数据时发生错误</p>
+      </div>
+      <EmptyState
+        icon={BarChart3}
+        title="加载失败"
+        description="请刷新页面重试，或联系管理员检查数据访问权限。"
+        className="h-[360px] bg-card"
+      />
+    </div>
+  )
+}