feat(app): add error/loading boundaries and update dashboard routes

- Add error.tsx and loading.tsx boundaries for admin, parent, student, teacher routes

- Add dashboard-error-fallback and dashboard-loading-skeleton components

- Add student/learning page, parent/leave routes, teacher textbook components

- Update existing app routes across auth, dashboard, and API endpoints

- Update proxy middleware and next-auth type declarations

src/app/(dashboard)/student/grades/error.tsx

@@ -0,0 +1,27 @@
+"use client"
+
+import { AlertCircle } from "lucide-react"
+
+import { EmptyState } from "@/shared/components/ui/empty-state"
+
+export default function StudentGradesError({
+  reset,
+}: {
+  error: Error & { digest?: string }
+  reset: () => void
+}) {
+  return (
+    <div className="flex h-full flex-col items-center justify-center space-y-4 p-8">
+      <EmptyState
+        icon={AlertCircle}
+        title="成绩查询页面加载失败"
+        description="抱歉，页面加载时发生了意外错误。请稍后重试。"
+        action={{
+          label: "重试",
+          onClick: () => reset(),
+        }}
+        className="border-none shadow-none h-auto"
+      />
+    </div>
+  )
+}

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

@@ -1,9 +1,13 @@
+import { getTranslations } from "next-intl/server"
 import { requirePermission } from "@/shared/lib/auth-guard"
 import { Permissions } from "@/shared/types/permissions"
 import { getStudentGradeSummary } from "@/modules/grades/data-access"
+import { getRankingTrend, getClassAverageTrend } from "@/modules/grades/data-access-ranking"
+import { getSubjectOptions } from "@/modules/school/data-access"
 import { StudentGradeSummary } from "@/modules/grades/components/student-grade-summary"
 import { GradeFilters } from "@/modules/grades/components/grade-filters"
 import { GradeTrendCard } from "@/modules/grades/components/grade-trend-card"
+import { RankingTrendCard } from "@/modules/grades/components/ranking-trend-card"
 import { EmptyState } from "@/shared/components/ui/empty-state"
 import { UserX } from "lucide-react"
 import { getParam, type SearchParams } from "@/shared/lib/search-params"
@@ -16,21 +20,28 @@ export default async function StudentGradesPage({
   searchParams: Promise<SearchParams>
 }) {
   const ctx = await requirePermission(Permissions.GRADE_RECORD_READ)
-  const [sp, summary] = await Promise.all([
+  const [sp, summary, rankingTrend, classAverageTrend, subjectOptions] = await Promise.all([
     searchParams,
-    getStudentGradeSummary(ctx.userId),
+    getStudentGradeSummary(ctx.userId, ctx.dataScope),
+    // v3-P1-3：接入排名趋势图
+    getRankingTrend(ctx.userId, undefined, undefined, ctx.dataScope),
+    // v3-P2-2：接入班级平均趋势对比线
+    getClassAverageTrend(ctx.userId, undefined, undefined, ctx.dataScope),
+    // v3-P2-1：获取科目列表用于过滤器
+    getSubjectOptions(),
   ])
 
   if (!summary) {
+    const t = await getTranslations("grades")
     return (
       <div className="space-y-8">
         <div>
-          <h2 className="text-2xl font-bold tracking-tight">My Grades</h2>
-          <p className="text-muted-foreground">View your grade records.</p>
+          <h2 className="text-2xl font-bold tracking-tight">{t("title.myGrades")}</h2>
+          <p className="text-muted-foreground">{t("summary.noDataDescription")}</p>
         </div>
         <EmptyState
-          title="No user found"
-          description="Unable to load your student profile."
+          title={t("summary.noDataTitle")}
+          description={t("summary.noDataDescription")}
           icon={UserX}
           className="border-none shadow-none"
         />
@@ -46,7 +57,8 @@ export default async function StudentGradesPage({
 
   const filteredRecords = summary.records.filter((r) => {
     if (q && !r.title.toLowerCase().includes(q)) return false
-    if (subjectFilter !== "all" && r.subjectName !== subjectFilter) return false
+    // v3-P2-1 修复：按 subjectId 而非 subjectName 过滤
+    if (subjectFilter !== "all" && r.subjectId !== subjectFilter) return false
     if (typeFilter !== "all" && r.type !== typeFilter) return false
     if (semesterFilter !== "all" && r.semester !== semesterFilter) return false
     return true
@@ -60,11 +72,16 @@ export default async function StudentGradesPage({
   return (
     <div className="space-y-8">
       <div>
-        <h2 className="text-2xl font-bold tracking-tight">My Grades</h2>
-        <p className="text-muted-foreground">View your grade records.</p>
+        <h2 className="text-2xl font-bold tracking-tight">{summary.studentName}</h2>
+        <p className="text-muted-foreground">{summary.records.length} 条成绩记录</p>
       </div>
-      <GradeFilters />
-      {filteredSummary.records.length > 0 && <GradeTrendCard summary={filteredSummary} />}
+      <GradeFilters subjects={subjectOptions.map((s) => ({ id: s.id, name: s.name }))} />
+      {filteredSummary.records.length > 0 && (
+        <div className="grid grid-cols-1 gap-6 lg:grid-cols-2">
+          <GradeTrendCard summary={filteredSummary} classAverageData={classAverageTrend} />
+          <RankingTrendCard trend={rankingTrend} />
+        </div>
+      )}
       <StudentGradeSummary summary={filteredSummary} />
     </div>
   )