feat(settings): 设置与个人信息模块审计重构 — i18n + 服务注入解耦 + Error Boundary + 流式渲染

- 新增 SettingsService 接口 + Context 注入，组件层不再直接 import users/messaging actions

- 新增 resolveRoleSettingsConfig 配置驱动角色路由，删除 parent/student/teacher-settings-view 冗余文件

- 新增 SettingsSectionErrorBoundary，每个 TabsContent + profile 角色概览区块均包裹

- 新增 ProfileStudentOverview/ProfileTeacherOverview 异步 Server Component + 骨架屏，支持流式渲染

- 抽取 buildStudentOverviewData 等纯函数到 lib/student-overview-data.ts，便于单元测试

- 新增 settings.json 翻译文件（zh-CN + en），所有组件改用 useTranslations/getTranslations

- 重构 profile/page.tsx：i18n 适配 + Suspense 分区加载 + 业务逻辑抽离

- 同步更新架构图 004/005

src/modules/settings/components/profile-student-overview.tsx

@@ -0,0 +1,93 @@
+import type { ReactElement } from "react"
+import { getTranslations } from "next-intl/server"
+
+import { StudentGradesCard } from "@/modules/dashboard/components/student-dashboard/student-grades-card"
+import { StudentStatsGrid } from "@/modules/dashboard/components/student-dashboard/student-stats-grid"
+import { StudentTodayScheduleCard } from "@/modules/dashboard/components/student-dashboard/student-today-schedule-card"
+import { StudentUpcomingAssignmentsCard } from "@/modules/dashboard/components/student-dashboard/student-upcoming-assignments-card"
+import { getStudentClasses, getStudentSchedule } from "@/modules/classes/data-access"
+import { getStudentDashboardGrades, getStudentHomeworkAssignments } from "@/modules/homework/data-access"
+import { buildStudentOverviewData } from "@/modules/settings/lib/student-overview-data"
+import { Separator } from "@/shared/components/ui/separator"
+
+interface ProfileStudentOverviewProps {
+  userId: string
+}
+
+/**
+ * 学生概览区块（Server Component）
+ *
+ * 独立获取学生数据并渲染，可被 Suspense + ErrorBoundary 包裹实现流式渲染与局部容错。
+ */
+export async function ProfileStudentOverview({
+  userId,
+}: ProfileStudentOverviewProps): Promise<ReactElement> {
+  const t = await getTranslations("settings.profilePage.studentOverview")
+
+  const [classes, schedule, assignmentsAll, grades] = await Promise.all([
+    getStudentClasses(userId),
+    getStudentSchedule(userId),
+    getStudentHomeworkAssignments(userId),
+    getStudentDashboardGrades(userId),
+  ])
+
+  const data = buildStudentOverviewData({
+    classes,
+    schedule,
+    assignments: assignmentsAll,
+    grades,
+  })
+
+  return (
+    <div className="space-y-6">
+      <Separator />
+      <div className="space-y-1">
+        <h2 className="text-xl font-semibold tracking-tight">{t("title")}</h2>
+        <div className="text-sm text-muted-foreground">{t("description")}</div>
+      </div>
+
+      <StudentStatsGrid
+        enrolledClassCount={data.enrolledClassCount}
+        dueSoonCount={data.dueSoonCount}
+        overdueCount={data.overdueCount}
+        gradedCount={data.gradedCount}
+        ranking={data.grades.ranking}
+      />
+
+      <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
+        <div className="lg:col-span-2 space-y-6">
+          <StudentUpcomingAssignmentsCard upcomingAssignments={data.upcomingAssignments} />
+          <StudentGradesCard grades={data.grades} />
+        </div>
+        <div className="space-y-6">
+          <StudentTodayScheduleCard items={data.todayScheduleItems} />
+        </div>
+      </div>
+    </div>
+  )
+}
+
+/**
+ * 学生概览骨架屏
+ */
+export function ProfileStudentOverviewSkeleton(): ReactElement {
+  return (
+    <div className="space-y-6">
+      <Separator />
+      <div className="space-y-2">
+        <div className="h-6 w-40 animate-pulse rounded bg-muted" />
+        <div className="h-4 w-64 animate-pulse rounded bg-muted" />
+      </div>
+      <div className="grid grid-cols-2 gap-4 lg:grid-cols-4">
+        {Array.from({ length: 4 }).map((_, i) => (
+          <div key={i} className="h-24 animate-pulse rounded-lg bg-muted" />
+        ))}
+      </div>
+      <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
+        <div className="lg:col-span-2 h-64 animate-pulse rounded-lg bg-muted" />
+        <div className="h-64 animate-pulse rounded-lg bg-muted" />
+      </div>
+    </div>
+  )
+}
+