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/settings-section-error-boundary.tsx

@@ -0,0 +1,64 @@
+"use client"
+
+import { Component, type ReactNode } from "react"
+import { AlertCircle } from "lucide-react"
+
+import { EmptyState } from "@/shared/components/ui/empty-state"
+import { useTranslations } from "next-intl"
+
+interface SettingsSectionErrorBoundaryProps {
+  children: ReactNode
+}
+
+interface SettingsSectionErrorBoundaryState {
+  hasError: boolean
+}
+
+/**
+ * 设置页分区 Error Boundary
+ *
+ * 包裹每个 TabsContent 内部组件，避免单个区块崩溃导致整页不可用。
+ */
+export class SettingsSectionErrorBoundary extends Component<
+  SettingsSectionErrorBoundaryProps,
+  SettingsSectionErrorBoundaryState
+> {
+  state: SettingsSectionErrorBoundaryState = { hasError: false }
+
+  static getDerivedStateFromError(): SettingsSectionErrorBoundaryState {
+    return { hasError: true }
+  }
+
+  handleRetry = (): void => {
+    this.setState({ hasError: false })
+  }
+
+  render(): ReactNode {
+    if (this.state.hasError) {
+      return (
+        <SettingsSectionErrorFallback onRetry={this.handleRetry} />
+      )
+    }
+    return this.props.children
+  }
+}
+
+function SettingsSectionErrorFallback({
+  onRetry,
+}: {
+  onRetry: () => void
+}): ReactNode {
+  const t = useTranslations("settings.errors")
+  return (
+    <EmptyState
+      icon={AlertCircle}
+      title={t("sectionLoadFailed")}
+      description={t("sectionLoadFailedDesc")}
+      action={{
+        label: t("retry"),
+        onClick: onRetry,
+      }}
+      className="border-none shadow-none h-auto"
+    />
+  )
+}