完善邮件验证与密码重置安全流程

frontend/src/components/Layout.vue

@@ -32,6 +32,13 @@
             <el-icon><DataAnalysis /></el-icon>
             <span>{{ TEXT.menu.systemMonitoring }}</span>
           </el-menu-item>
+          <el-sub-menu v-if="isAdmin" index="system-settings">
+            <template #title>
+              <el-icon><Setting /></el-icon>
+              <span>系统设置</span>
+            </template>
+            <el-menu-item index="/admin/email-settings">邮件服务</el-menu-item>
+          </el-sub-menu>
           <el-sub-menu v-if="canAccessAdminPermissions" index="permissions">
             <template #title>
               <el-icon><Key /></el-icon>
@@ -337,7 +344,7 @@ import { listMonitoringVisitIssues } from "../api/monitoringVisitIssues";
 import { TEXT } from "../locales";
 import {
   User, Suitcase, House, Calendar, Flag,
-  CircleCheck, Box, Coin, Notebook, Document, ArrowDown, SwitchButton, Files, Key, DataAnalysis, Lock, UserFilled, Bell
+  CircleCheck, Box, Coin, Notebook, Document, ArrowDown, SwitchButton, Files, Key, DataAnalysis, Lock, UserFilled, Bell, Setting
 } from "@element-plus/icons-vue";
 import { ElMessageBox } from "element-plus";
 import { getProjectRoutePermission, hasProjectPermission, projectRouteLandingPaths } from "../utils/projectRoutePermissions";
@@ -596,6 +603,7 @@ const breadcrumbs = computed(() => {
     topItems.push({ label: TEXT.menu.projectManagement, path: "/admin/projects" });
     if (isAdmin.value) topItems.push({ label: TEXT.menu.auditLogs, path: "/admin/audit-logs" });
     if (isAdmin.value) topItems.push({ label: TEXT.menu.systemMonitoring, path: "/admin/system-monitoring" });
+    if (isAdmin.value) topItems.push({ label: "邮件服务", path: "/admin/email-settings" });
     if (canAccessAdminPermissions.value) topItems.push({ label: TEXT.menu.permissionManagement, path: "/admin/permissions/system" });
 
     // 权限管理子页，供「权限管理」父级与末级横跳