feat(user-menu): add QuickNav entry for members with role-based visibility

Introduced a new QuickNav menu item for 'members' in the UserMenu component, allowing users with the appropriate role to access member-related functionalities. Updated the role alignment for QuickNav entries to ensure consistency with the Settings component. This enhancement improves navigation for users based on their permissions.

Refs: #1303

frontend/src/components/UserMenu.vue

@@ -62,10 +62,14 @@
             :title="$t('tenant.switcher.menuLabel')" />
         </div>
         <div class="menu-divider"></div>
-        <!-- QuickNav 入口与 Settings 的最低角色对齐：models/websearch/mcp/api
-             分别对应 viewer/admin/admin/owner（详情见 Settings.vue 的
+        <!-- QuickNav 入口与 Settings 的最低角色对齐：members/models/websearch/mcp/api
+             分别对应 viewer/viewer/admin/admin/owner（详情见 Settings.vue 的
              SECTION_MIN_ROLE）。低角色用户看到这些入口点进去也只能看到
              role-denied 兜底页，索性藏起来。 -->
+        <div v-if="canSeeQuickNav('members')" class="menu-item" @click="handleQuickNav('members')">
+          <t-icon name="usergroup" class="menu-icon" />
+          <span>{{ $t('tenantMember.title') }}</span>
+        </div>
         <div v-if="canSeeQuickNav('models')" class="menu-item" @click="handleQuickNav('models')">
           <t-icon name="control-platform" class="menu-icon" />
           <span>{{ $t('settings.modelManagement') }}</span>
@@ -269,6 +273,7 @@ const showTenantIdentityLine = computed(() => {
 // 与 Settings.vue 的 SECTION_MIN_ROLE 同步；这里只挂 quickNav 直接跳转的
 // 那 4 项。改这张表前请同步 Settings.vue 的对照注释。
 const QUICKNAV_MIN_ROLE: Record<string, 'viewer' | 'contributor' | 'admin' | 'owner'> = {
+  members: 'viewer',
   models: 'viewer',
   websearch: 'admin',
   mcp: 'admin',