feat: 添加简单模式功能

新增简单模式设置，适合个人使用场景：
- 隐藏多用户管理相关菜单（用户管理、兑换码等）
- 自动关闭用户注册功能
- 管理员并发数自动设为无限制(99999)
- 侧边栏根据模式动态调整菜单项

同时优化分组页面的"专属分组"功能，添加帮助提示说明使用场景

backend/cmd/server/wire_gen.go

@@ -99,7 +99,7 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	geminiOAuthHandler := admin.NewGeminiOAuthHandler(geminiOAuthService)
 	proxyHandler := admin.NewProxyHandler(adminService)
 	adminRedeemHandler := admin.NewRedeemHandler(adminService)
-	settingHandler := admin.NewSettingHandler(settingService, emailService)
+	settingHandler := admin.NewSettingHandler(settingService, emailService, userService)
 	updateCache := repository.NewUpdateCache(client)
 	gitHubReleaseClient := repository.NewGitHubReleaseClient()
 	serviceBuildInfo := provideServiceBuildInfo(buildInfo)

backend/internal/handler/admin/setting_handler.go

@@ -12,13 +12,15 @@ import (
 type SettingHandler struct {
 	settingService *service.SettingService
 	emailService   *service.EmailService
+	userService    *service.UserService
 }
 
 // NewSettingHandler 创建系统设置处理器
-func NewSettingHandler(settingService *service.SettingService, emailService *service.EmailService) *SettingHandler {
+func NewSettingHandler(settingService *service.SettingService, emailService *service.EmailService, userService *service.UserService) *SettingHandler {
 	return &SettingHandler{
 		settingService: settingService,
 		emailService:   emailService,
+		userService:    userService,
 	}
 }
 
@@ -52,6 +54,7 @@ func (h *SettingHandler) GetSettings(c *gin.Context) {
 		DocUrl:              settings.DocUrl,
 		DefaultConcurrency:  settings.DefaultConcurrency,
 		DefaultBalance:      settings.DefaultBalance,
+		SimpleMode:          settings.SimpleMode,
 	})
 }
 
@@ -86,6 +89,9 @@ type UpdateSettingsRequest struct {
 	// 默认配置
 	DefaultConcurrency int     `json:"default_concurrency"`
 	DefaultBalance     float64 `json:"default_balance"`
+
+	// 使用模式
+	SimpleMode bool `json:"simple_mode"`
 }
 
 // UpdateSettings 更新系统设置
@@ -108,8 +114,14 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 		req.SmtpPort = 587
 	}
 
+	// 简单模式下自动关闭开放注册
+	registrationEnabled := req.RegistrationEnabled
+	if req.SimpleMode {
+		registrationEnabled = false
+	}
+
 	settings := &service.SystemSettings{
-		RegistrationEnabled: req.RegistrationEnabled,
+		RegistrationEnabled: registrationEnabled,
 		EmailVerifyEnabled:  req.EmailVerifyEnabled,
 		SmtpHost:            req.SmtpHost,
 		SmtpPort:            req.SmtpPort,
@@ -129,6 +141,7 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 		DocUrl:              req.DocUrl,
 		DefaultConcurrency:  req.DefaultConcurrency,
 		DefaultBalance:      req.DefaultBalance,
+		SimpleMode:          req.SimpleMode,
 	}
 
 	if err := h.settingService.UpdateSettings(c.Request.Context(), settings); err != nil {
@@ -136,6 +149,14 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 		return
 	}
 
+	// 如果切换到简单模式，自动将管理员并发数设为 99999
+	if req.SimpleMode {
+		admin, err := h.userService.GetFirstAdmin(c.Request.Context())
+		if err == nil && admin != nil {
+			_ = h.userService.UpdateConcurrency(c.Request.Context(), admin.ID, 99999)
+		}
+	}
+
 	// 重新获取设置返回
 	updatedSettings, err := h.settingService.GetAllSettings(c.Request.Context())
 	if err != nil {
@@ -164,6 +185,7 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 		DocUrl:              updatedSettings.DocUrl,
 		DefaultConcurrency:  updatedSettings.DefaultConcurrency,
 		DefaultBalance:      updatedSettings.DefaultBalance,
+		SimpleMode:          updatedSettings.SimpleMode,
 	})
 }
 

backend/internal/handler/dto/settings.go

@@ -26,6 +26,8 @@ type SystemSettings struct {
 
 	DefaultConcurrency int     `json:"default_concurrency"`
 	DefaultBalance     float64 `json:"default_balance"`
+
+	SimpleMode bool `json:"simple_mode"` // 简单模式
 }
 
 type PublicSettings struct {
@@ -40,4 +42,5 @@ type PublicSettings struct {
 	ContactInfo         string `json:"contact_info"`
 	DocUrl              string `json:"doc_url"`
 	Version             string `json:"version"`
+	SimpleMode          bool   `json:"simple_mode"` // 简单模式
 }

backend/internal/handler/setting_handler.go

@@ -43,5 +43,6 @@ func (h *SettingHandler) GetPublicSettings(c *gin.Context) {
 		ContactInfo:         settings.ContactInfo,
 		DocUrl:              settings.DocUrl,
 		Version:             h.version,
+		SimpleMode:          settings.SimpleMode,
 	})
 }

backend/internal/service/domain_constants.go

@@ -90,6 +90,9 @@ const (
 
 	// 管理员 API Key
 	SettingKeyAdminApiKey = "admin_api_key" // 全局管理员 API Key（用于外部系统集成）
+
+	// 使用模式
+	SettingKeySimpleMode = "simple_mode" // 简单模式（隐藏多用户管理功能）
 )
 
 // Admin API Key prefix (distinct from user "sk-" keys)

backend/internal/service/setting_service.go

@@ -64,6 +64,7 @@ func (s *SettingService) GetPublicSettings(ctx context.Context) (*PublicSettings
 		SettingKeyApiBaseUrl,
 		SettingKeyContactInfo,
 		SettingKeyDocUrl,
+		SettingKeySimpleMode,
 	}
 
 	settings, err := s.settingRepo.GetMultiple(ctx, keys)
@@ -82,6 +83,7 @@ func (s *SettingService) GetPublicSettings(ctx context.Context) (*PublicSettings
 		ApiBaseUrl:          settings[SettingKeyApiBaseUrl],
 		ContactInfo:         settings[SettingKeyContactInfo],
 		DocUrl:              settings[SettingKeyDocUrl],
+		SimpleMode:          settings[SettingKeySimpleMode] == "true",
 	}, nil
 }
 
@@ -123,6 +125,9 @@ func (s *SettingService) UpdateSettings(ctx context.Context, settings *SystemSet
 	updates[SettingKeyDefaultConcurrency] = strconv.Itoa(settings.DefaultConcurrency)
 	updates[SettingKeyDefaultBalance] = strconv.FormatFloat(settings.DefaultBalance, 'f', 8, 64)
 
+	// 使用模式
+	updates[SettingKeySimpleMode] = strconv.FormatBool(settings.SimpleMode)
+
 	return s.settingRepo.SetMultiple(ctx, updates)
 }
 
@@ -223,6 +228,7 @@ func (s *SettingService) parseSettings(settings map[string]string) *SystemSettin
 		ApiBaseUrl:          settings[SettingKeyApiBaseUrl],
 		ContactInfo:         settings[SettingKeyContactInfo],
 		DocUrl:              settings[SettingKeyDocUrl],
+		SimpleMode:          settings[SettingKeySimpleMode] == "true",
 	}
 
 	// 解析整数类型

backend/internal/service/settings_view.go

@@ -25,6 +25,8 @@ type SystemSettings struct {
 
 	DefaultConcurrency int
 	DefaultBalance     float64
+
+	SimpleMode bool // 简单模式
 }
 
 type PublicSettings struct {
@@ -39,4 +41,5 @@ type PublicSettings struct {
 	ContactInfo         string
 	DocUrl              string
 	Version             string
+	SimpleMode          bool // 简单模式
 }

backend/internal/service/user_service.go

@@ -164,6 +164,14 @@ func (s *UserService) UpdateBalance(ctx context.Context, userID int64, amount fl
 	return nil
 }
 
+// UpdateConcurrency 更新用户并发数（管理员功能）
+func (s *UserService) UpdateConcurrency(ctx context.Context, userID int64, concurrency int) error {
+	if err := s.userRepo.UpdateConcurrency(ctx, userID, concurrency); err != nil {
+		return fmt.Errorf("update concurrency: %w", err)
+	}
+	return nil
+}
+
 // UpdateStatus 更新用户状态（管理员功能）
 func (s *UserService) UpdateStatus(ctx context.Context, userID int64, status string) error {
 	user, err := s.userRepo.GetByID(ctx, userID)

frontend/src/api/admin/settings.ts

@@ -34,6 +34,8 @@ export interface SystemSettings {
   turnstile_enabled: boolean
   turnstile_site_key: string
   turnstile_secret_key: string
+  // Usage mode
+  simple_mode: boolean
 }
 
 /**

frontend/src/components/layout/AppSidebar.vue

@@ -45,8 +45,8 @@
           </router-link>
         </div>
 
-        <!-- Personal Section for Admin -->
-        <div class="sidebar-section">
+        <!-- Personal Section for Admin (hidden in simple mode) -->
+        <div v-if="!simpleMode" class="sidebar-section">
           <div v-if="!sidebarCollapsed" class="sidebar-section-title">
             {{ t('nav.myAccount') }}
           </div>
@@ -154,6 +154,7 @@ const isDark = ref(document.documentElement.classList.contains('dark'))
 const siteName = computed(() => appStore.siteName)
 const siteLogo = computed(() => appStore.siteLogo)
 const siteVersion = computed(() => appStore.siteVersion)
+const simpleMode = computed(() => appStore.simpleMode)
 
 // SVG Icon Components
 const DashboardIcon = {
@@ -402,36 +403,54 @@ const ChevronDoubleRightIcon = {
 }
 
 // User navigation items (for regular users)
-const userNavItems = computed(() => [
+const userNavItems = computed(() => {
+  const items = [
     { path: '/dashboard', label: t('nav.dashboard'), icon: DashboardIcon },
     { path: '/keys', label: t('nav.apiKeys'), icon: KeyIcon },
-  { path: '/usage', label: t('nav.usage'), icon: ChartIcon },
-  { path: '/subscriptions', label: t('nav.mySubscriptions'), icon: CreditCardIcon },
-  { path: '/redeem', label: t('nav.redeem'), icon: GiftIcon },
+    { path: '/usage', label: t('nav.usage'), icon: ChartIcon, hideInSimpleMode: true },
+    { path: '/subscriptions', label: t('nav.mySubscriptions'), icon: CreditCardIcon, hideInSimpleMode: true },
+    { path: '/redeem', label: t('nav.redeem'), icon: GiftIcon, hideInSimpleMode: true },
     { path: '/profile', label: t('nav.profile'), icon: UserIcon }
-])
+  ]
+  return simpleMode.value ? items.filter(item => !item.hideInSimpleMode) : items
+})
 
 // Personal navigation items (for admin's "My Account" section, without Dashboard)
-const personalNavItems = computed(() => [
+const personalNavItems = computed(() => {
+  const items = [
     { path: '/keys', label: t('nav.apiKeys'), icon: KeyIcon },
-  { path: '/usage', label: t('nav.usage'), icon: ChartIcon },
-  { path: '/subscriptions', label: t('nav.mySubscriptions'), icon: CreditCardIcon },
-  { path: '/redeem', label: t('nav.redeem'), icon: GiftIcon },
+    { path: '/usage', label: t('nav.usage'), icon: ChartIcon, hideInSimpleMode: true },
+    { path: '/subscriptions', label: t('nav.mySubscriptions'), icon: CreditCardIcon, hideInSimpleMode: true },
+    { path: '/redeem', label: t('nav.redeem'), icon: GiftIcon, hideInSimpleMode: true },
     { path: '/profile', label: t('nav.profile'), icon: UserIcon }
-])
+  ]
+  return simpleMode.value ? items.filter(item => !item.hideInSimpleMode) : items
+})
 
 // Admin navigation items
-const adminNavItems = computed(() => [
+const adminNavItems = computed(() => {
+  const baseItems = [
     { path: '/admin/dashboard', label: t('nav.dashboard'), icon: DashboardIcon },
-  { path: '/admin/users', label: t('nav.users'), icon: UsersIcon },
+    { path: '/admin/users', label: t('nav.users'), icon: UsersIcon, hideInSimpleMode: true },
     { path: '/admin/groups', label: t('nav.groups'), icon: FolderIcon },
     { path: '/admin/subscriptions', label: t('nav.subscriptions'), icon: CreditCardIcon },
     { path: '/admin/accounts', label: t('nav.accounts'), icon: GlobeIcon },
     { path: '/admin/proxies', label: t('nav.proxies'), icon: ServerIcon },
-  { path: '/admin/redeem', label: t('nav.redeemCodes'), icon: TicketIcon },
+    { path: '/admin/redeem', label: t('nav.redeemCodes'), icon: TicketIcon, hideInSimpleMode: true },
     { path: '/admin/usage', label: t('nav.usage'), icon: ChartIcon },
-  { path: '/admin/settings', label: t('nav.settings'), icon: CogIcon }
-])
+  ]
+
+  // 简单模式下，在系统设置前插入 API密钥
+  if (simpleMode.value) {
+    const filtered = baseItems.filter(item => !item.hideInSimpleMode)
+    filtered.push({ path: '/keys', label: t('nav.apiKeys'), icon: KeyIcon })
+    filtered.push({ path: '/admin/settings', label: t('nav.settings'), icon: CogIcon })
+    return filtered
+  }
+
+  baseItems.push({ path: '/admin/settings', label: t('nav.settings'), icon: CogIcon })
+  return baseItems
+})
 
 function toggleSidebar() {
   appStore.toggleSidebar()

frontend/src/i18n/locales/en.ts

@@ -676,14 +676,21 @@ export default {
         description: 'Description',
         platform: 'Platform',
         rateMultiplier: 'Rate Multiplier',
-        status: 'Status'
+        status: 'Status',
+        exclusive: 'Exclusive Group'
       },
       enterGroupName: 'Enter group name',
       optionalDescription: 'Optional description',
       platformHint: 'Select the platform this group is associated with',
       platformNotEditable: 'Platform cannot be changed after creation',
       rateMultiplierHint: 'Cost multiplier for this group (e.g., 1.5 = 150% of base cost)',
-      exclusiveHint: 'Exclusive (requires explicit user access)',
+      exclusiveHint: 'Exclusive group, manually assign to specific users',
+      exclusiveTooltip: {
+        title: 'What is an exclusive group?',
+        description: 'When enabled, users cannot see this group when creating API Keys. Only after an admin manually assigns a user to this group can they use it.',
+        example: 'Use case:',
+        exampleContent: 'Public group rate is 0.8. Create an exclusive group with 0.7 rate, manually assign VIP users to give them better pricing.'
+      },
       noGroupsYet: 'No groups yet',
       createFirstGroup: 'Create your first group to organize API keys.',
       creating: 'Creating...',
@@ -1400,6 +1407,16 @@ export default {
         securityWarning: 'Warning: This key provides full admin access. Keep it secure.',
         usage: 'Usage: Add to request header - x-api-key: <your-admin-api-key>'
       },
+      usageMode: {
+        title: 'Usage Mode',
+        description: 'Toggle simple mode for a simplified interface',
+        simpleMode: 'Simple Mode',
+        simpleModeHint: 'Hide multi-user management features, suitable for personal use',
+        simpleModeWarning: 'When enabled, user management and redeem code menus will be hidden, registration will be disabled, and admin concurrency will be set to unlimited',
+        confirmTitle: 'Confirm Mode Change',
+        confirmEnableMessage: 'Are you sure you want to enable Simple Mode? This will hide multi-user management menus, disable registration, and set admin concurrency to 99999 (unlimited).',
+        confirmDisableMessage: 'Are you sure you want to disable Simple Mode? This will restore all management menus.'
+      },
       saveSettings: 'Save Settings',
       saving: 'Saving...',
       settingsSaved: 'Settings saved successfully',

frontend/src/i18n/locales/zh.ts

@@ -733,14 +733,15 @@ export default {
         platform: '平台',
         rateMultiplier: '费率倍数',
         status: '状态',
+        exclusive: '专属分组',
         nameLabel: '分组名称',
         namePlaceholder: '请输入分组名称',
         descriptionLabel: '描述',
         descriptionPlaceholder: '请输入描述（可选）',
         rateMultiplierLabel: '费率倍数',
         rateMultiplierHint: '1.0 = 标准费率，0.5 = 半价，2.0 = 双倍',
-        exclusiveLabel: '独占模式',
-        exclusiveHint: '启用后，此分组的用户将独占使用分配的账号',
+        exclusiveLabel: '专属分组',
+        exclusiveHint: '专属分组，可以手动指定给用户',
         platformLabel: '平台限制',
         platformPlaceholder: '选择平台（留空则不限制）',
         accountsLabel: '指定账号',
@@ -753,8 +754,14 @@ export default {
         yes: '是',
         no: '否'
       },
-      exclusive: '独占',
-      exclusiveHint: '启用后，此分组的用户将独占使用分配的账号',
+      exclusive: '专属',
+      exclusiveHint: '专属分组，可以手动指定给特定用户',
+      exclusiveTooltip: {
+        title: '什么是专属分组？',
+        description: '开启后，用户在创建 API Key 时将无法看到此分组。只有管理员手动将用户分配到此分组后，用户才能使用。',
+        example: '使用场景：',
+        exampleContent: '公开分组费率 0.8，您可以创建一个费率 0.7 的专属分组，手动分配给 VIP 用户，让他们享受更优惠的价格。'
+      },
       rateMultiplierHint: '1.0 = 标准费率，0.5 = 半价，2.0 = 双倍',
       platforms: {
         all: '全部平台',
@@ -773,8 +780,8 @@ export default {
       allPlatforms: '全部平台',
       allStatus: '全部状态',
       allGroups: '全部分组',
-      exclusiveFilter: '独占',
-      nonExclusive: '非独占',
+      exclusiveFilter: '专属',
+      nonExclusive: '公开',
       public: '公开',
       rateAndAccounts: '{rate}x 费率 · {count} 个账号',
       accountsCount: '{count} 个账号',
@@ -1597,6 +1604,16 @@ export default {
         securityWarning: '警告：此密钥拥有完整的管理员权限，请妥善保管。',
         usage: '使用方法：在请求头中添加 x-api-key: <your-admin-api-key>'
       },
+      usageMode: {
+        title: '使用模式',
+        description: '切换简单模式以简化界面',
+        simpleMode: '简单模式',
+        simpleModeHint: '隐藏多用户管理功能，适合个人使用',
+        simpleModeWarning: '启用后将隐藏用户管理、兑换码管理等菜单，关闭用户注册功能，并将管理员并发数设为无限制',
+        confirmTitle: '确认切换使用模式',
+        confirmEnableMessage: '确定要启用简单模式吗？启用后将隐藏多用户管理相关菜单、关闭用户注册功能，并将管理员并发数设为 99999（无限制）。',
+        confirmDisableMessage: '确定要关闭简单模式吗？关闭后将恢复显示所有管理菜单。'
+      },
       saveSettings: '保存设置',
       saving: '保存中...',
       settingsSaved: '设置保存成功',

frontend/src/stores/app.ts

@@ -30,6 +30,7 @@ export const useAppStore = defineStore('app', () => {
   const contactInfo = ref<string>('')
   const apiBaseUrl = ref<string>('')
   const docUrl = ref<string>('')
+  const simpleMode = ref<boolean>(false)
 
   // Version cache state
   const versionLoaded = ref<boolean>(false)
@@ -296,7 +297,8 @@ export const useAppStore = defineStore('app', () => {
         api_base_url: apiBaseUrl.value,
         contact_info: contactInfo.value,
         doc_url: docUrl.value,
-        version: siteVersion.value
+        version: siteVersion.value,
+        simple_mode: simpleMode.value
       }
     }
 
@@ -314,6 +316,7 @@ export const useAppStore = defineStore('app', () => {
       contactInfo.value = data.contact_info || ''
       apiBaseUrl.value = data.api_base_url || ''
       docUrl.value = data.doc_url || ''
+      simpleMode.value = data.simple_mode || false
       publicSettingsLoaded.value = true
       return data
     } catch (error) {
@@ -348,6 +351,7 @@ export const useAppStore = defineStore('app', () => {
     contactInfo,
     apiBaseUrl,
     docUrl,
+    simpleMode,
 
     // Version state
     versionLoaded,

frontend/src/types/index.ts

@@ -55,6 +55,7 @@ export interface PublicSettings {
   contact_info: string
   doc_url: string
   version: string
+  simple_mode: boolean
 }
 
 export interface AuthResponse {

frontend/src/views/admin/GroupsView.vue

@@ -272,7 +272,42 @@
           />
           <p class="input-hint">{{ t('admin.groups.rateMultiplierHint') }}</p>
         </div>
-        <div v-if="createForm.subscription_type !== 'subscription'" class="flex items-center gap-3">
+        <div v-if="createForm.subscription_type !== 'subscription'">
+          <div class="mb-1.5 flex items-center gap-1">
+            <label class="text-sm font-medium text-gray-700 dark:text-gray-300">
+              {{ t('admin.groups.form.exclusive') }}
+            </label>
+            <!-- Help Tooltip -->
+            <div class="group relative inline-flex">
+              <svg
+                class="h-3.5 w-3.5 cursor-help text-gray-400 transition-colors hover:text-primary-500 dark:text-gray-500 dark:hover:text-primary-400"
+                fill="none"
+                viewBox="0 0 24 24"
+                stroke="currentColor"
+                stroke-width="2"
+              >
+                <path stroke-linecap="round" stroke-linejoin="round" d="M8.228 9c.549-1.165 2.03-2 3.772-2 2.21 0 4 1.343 4 3 0 1.4-1.278 2.575-3.006 2.907-.542.104-.994.54-.994 1.093m0 3h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
+              </svg>
+              <!-- Tooltip Popover -->
+              <div class="pointer-events-none absolute bottom-full left-0 z-50 mb-2 w-72 opacity-0 transition-all duration-200 group-hover:pointer-events-auto group-hover:opacity-100">
+                <div class="rounded-lg bg-gray-900 p-3 text-white shadow-lg dark:bg-gray-800">
+                  <p class="mb-2 text-xs font-medium">{{ t('admin.groups.exclusiveTooltip.title') }}</p>
+                  <p class="mb-2 text-xs leading-relaxed text-gray-300">
+                    {{ t('admin.groups.exclusiveTooltip.description') }}
+                  </p>
+                  <div class="rounded bg-gray-800 p-2 dark:bg-gray-700">
+                    <p class="text-xs leading-relaxed text-gray-300">
+                      <span class="text-primary-400">💡 {{ t('admin.groups.exclusiveTooltip.example') }}</span>
+                      {{ t('admin.groups.exclusiveTooltip.exampleContent') }}
+                    </p>
+                  </div>
+                  <!-- Arrow -->
+                  <div class="absolute -bottom-1.5 left-3 h-3 w-3 rotate-45 bg-gray-900 dark:bg-gray-800"></div>
+                </div>
+              </div>
+            </div>
+          </div>
+          <div class="flex items-center gap-3">
             <button
               type="button"
               @click="createForm.is_exclusive = !createForm.is_exclusive"
@@ -288,18 +323,15 @@
                 ]"
               />
             </button>
-          <label class="text-sm text-gray-700 dark:text-gray-300">
-            {{ t('admin.groups.exclusiveHint') }}
-          </label>
+            <span class="text-sm text-gray-500 dark:text-gray-400">
+              {{ createForm.is_exclusive ? t('admin.groups.exclusive') : t('admin.groups.public') }}
+            </span>
+          </div>
         </div>
 
         <!-- Subscription Configuration -->
         <div class="mt-4 border-t pt-4">
-          <h4 class="mb-4 text-sm font-medium text-gray-900 dark:text-white">
-            {{ t('admin.groups.subscription.title') }}
-          </h4>
-
-          <div class="mb-4">
+          <div>
             <label class="input-label">{{ t('admin.groups.subscription.type') }}</label>
             <Select v-model="createForm.subscription_type" :options="subscriptionTypeOptions" />
             <p class="input-hint">{{ t('admin.groups.subscription.typeHint') }}</p>
@@ -422,7 +454,42 @@
             class="input"
           />
         </div>
-        <div v-if="editForm.subscription_type !== 'subscription'" class="flex items-center gap-3">
+        <div v-if="editForm.subscription_type !== 'subscription'">
+          <div class="mb-1.5 flex items-center gap-1">
+            <label class="text-sm font-medium text-gray-700 dark:text-gray-300">
+              {{ t('admin.groups.form.exclusive') }}
+            </label>
+            <!-- Help Tooltip -->
+            <div class="group relative inline-flex">
+              <svg
+                class="h-3.5 w-3.5 cursor-help text-gray-400 transition-colors hover:text-primary-500 dark:text-gray-500 dark:hover:text-primary-400"
+                fill="none"
+                viewBox="0 0 24 24"
+                stroke="currentColor"
+                stroke-width="2"
+              >
+                <path stroke-linecap="round" stroke-linejoin="round" d="M8.228 9c.549-1.165 2.03-2 3.772-2 2.21 0 4 1.343 4 3 0 1.4-1.278 2.575-3.006 2.907-.542.104-.994.54-.994 1.093m0 3h.01M21 12a9 9 0 11-18 0 9 9 0 0118 0z" />
+              </svg>
+              <!-- Tooltip Popover -->
+              <div class="pointer-events-none absolute bottom-full left-0 z-50 mb-2 w-72 opacity-0 transition-all duration-200 group-hover:pointer-events-auto group-hover:opacity-100">
+                <div class="rounded-lg bg-gray-900 p-3 text-white shadow-lg dark:bg-gray-800">
+                  <p class="mb-2 text-xs font-medium">{{ t('admin.groups.exclusiveTooltip.title') }}</p>
+                  <p class="mb-2 text-xs leading-relaxed text-gray-300">
+                    {{ t('admin.groups.exclusiveTooltip.description') }}
+                  </p>
+                  <div class="rounded bg-gray-800 p-2 dark:bg-gray-700">
+                    <p class="text-xs leading-relaxed text-gray-300">
+                      <span class="text-primary-400">💡 {{ t('admin.groups.exclusiveTooltip.example') }}</span>
+                      {{ t('admin.groups.exclusiveTooltip.exampleContent') }}
+                    </p>
+                  </div>
+                  <!-- Arrow -->
+                  <div class="absolute -bottom-1.5 left-3 h-3 w-3 rotate-45 bg-gray-900 dark:bg-gray-800"></div>
+                </div>
+              </div>
+            </div>
+          </div>
+          <div class="flex items-center gap-3">
             <button
               type="button"
               @click="editForm.is_exclusive = !editForm.is_exclusive"
@@ -438,9 +505,10 @@
                 ]"
               />
             </button>
-          <label class="text-sm text-gray-700 dark:text-gray-300">
-            {{ t('admin.groups.exclusiveHint') }}
-          </label>
+            <span class="text-sm text-gray-500 dark:text-gray-400">
+              {{ editForm.is_exclusive ? t('admin.groups.exclusive') : t('admin.groups.public') }}
+            </span>
+          </div>
         </div>
         <div>
           <label class="input-label">{{ t('admin.groups.form.status') }}</label>
@@ -449,11 +517,7 @@
 
         <!-- Subscription Configuration -->
         <div class="mt-4 border-t pt-4">
-          <h4 class="mb-4 text-sm font-medium text-gray-900 dark:text-white">
-            {{ t('admin.groups.subscription.title') }}
-          </h4>
-
-          <div class="mb-4">
+          <div>
             <label class="input-label">{{ t('admin.groups.subscription.type') }}</label>
             <Select
               v-model="editForm.subscription_type"
@@ -619,10 +683,18 @@ const editStatusOptions = computed(() => [
   { value: 'inactive', label: t('common.inactive') }
 ])
 
-const subscriptionTypeOptions = computed(() => [
+const subscriptionTypeOptions = computed(() => {
+  // 简单模式下只显示订阅模式（配额模式）
+  if (appStore.simpleMode) {
+    return [
+      { value: 'subscription', label: t('admin.groups.subscription.subscription') }
+    ]
+  }
+  return [
     { value: 'standard', label: t('admin.groups.subscription.standard') },
     { value: 'subscription', label: t('admin.groups.subscription.subscription') }
-])
+  ]
+})
 
 const groups = ref<Group[]>([])
 const loading = ref(false)
@@ -732,7 +804,7 @@ const closeCreateModal = () => {
   createForm.platform = 'anthropic'
   createForm.rate_multiplier = 1.0
   createForm.is_exclusive = false
-  createForm.subscription_type = 'standard'
+  createForm.subscription_type = appStore.simpleMode ? 'subscription' : 'standard'
   createForm.daily_limit_usd = null
   createForm.weekly_limit_usd = null
   createForm.monthly_limit_usd = null
@@ -823,5 +895,9 @@ watch(
 
 onMounted(() => {
   loadGroups()
+  // 简单模式下默认使用订阅模式
+  if (appStore.simpleMode) {
+    createForm.subscription_type = 'subscription'
+  }
 })
 </script>

frontend/src/views/admin/SettingsView.vue

@@ -153,6 +153,58 @@
           </div>
         </div>
 
+        <!-- Usage Mode Settings -->
+        <div class="card">
+          <div class="border-b border-gray-100 px-6 py-4 dark:border-dark-700">
+            <h2 class="text-lg font-semibold text-gray-900 dark:text-white">
+              {{ t('admin.settings.usageMode.title') }}
+            </h2>
+            <p class="mt-1 text-sm text-gray-500 dark:text-gray-400">
+              {{ t('admin.settings.usageMode.description') }}
+            </p>
+          </div>
+          <div class="space-y-5 p-6">
+            <!-- Simple Mode Toggle -->
+            <div class="flex items-center justify-between">
+              <div>
+                <label class="font-medium text-gray-900 dark:text-white">
+                  {{ t('admin.settings.usageMode.simpleMode') }}
+                </label>
+                <p class="text-sm text-gray-500 dark:text-gray-400">
+                  {{ t('admin.settings.usageMode.simpleModeHint') }}
+                </p>
+              </div>
+              <Toggle
+                :model-value="form.simple_mode"
+                @update:model-value="onSimpleModeToggle"
+              />
+            </div>
+
+            <!-- Warning when simple mode is enabled -->
+            <div
+              v-if="form.simple_mode"
+              class="rounded-lg border border-amber-200 bg-amber-50 p-4 dark:border-amber-800 dark:bg-amber-900/20"
+            >
+              <div class="flex items-start">
+                <svg
+                  class="mt-0.5 h-5 w-5 flex-shrink-0 text-amber-500"
+                  fill="currentColor"
+                  viewBox="0 0 20 20"
+                >
+                  <path
+                    fill-rule="evenodd"
+                    d="M8.257 3.099c.765-1.36 2.722-1.36 3.486 0l5.58 9.92c.75 1.334-.213 2.98-1.742 2.98H4.42c-1.53 0-2.493-1.646-1.743-2.98l5.58-9.92zM11 13a1 1 0 11-2 0 1 1 0 012 0zm-1-8a1 1 0 00-1 1v3a1 1 0 002 0V6a1 1 0 00-1-1z"
+                    clip-rule="evenodd"
+                  />
+                </svg>
+                <p class="ml-3 text-sm text-amber-700 dark:text-amber-300">
+                  {{ t('admin.settings.usageMode.simpleModeWarning') }}
+                </p>
+              </div>
+            </div>
+          </div>
+        </div>
+
         <!-- Registration Settings -->
         <div class="card">
           <div class="border-b border-gray-100 px-6 py-4 dark:border-dark-700">
@@ -706,6 +758,19 @@
         </div>
       </form>
     </div>
+
+    <!-- Simple Mode Confirmation Dialog -->
+    <ConfirmDialog
+      :show="showSimpleModeConfirm"
+      :title="t('admin.settings.usageMode.confirmTitle')"
+      :message="pendingSimpleModeValue
+        ? t('admin.settings.usageMode.confirmEnableMessage')
+        : t('admin.settings.usageMode.confirmDisableMessage')"
+      :confirm-text="t('common.confirm')"
+      :cancel-text="t('common.cancel')"
+      @confirm="confirmSimpleModeChange"
+      @cancel="cancelSimpleModeChange"
+    />
   </AppLayout>
 </template>
 
@@ -716,6 +781,7 @@ import { adminAPI } from '@/api'
 import type { SystemSettings } from '@/api/admin/settings'
 import AppLayout from '@/components/layout/AppLayout.vue'
 import Toggle from '@/components/common/Toggle.vue'
+import ConfirmDialog from '@/components/common/ConfirmDialog.vue'
 import { useAppStore } from '@/stores'
 
 const { t } = useI18n()
@@ -728,6 +794,10 @@ const sendingTestEmail = ref(false)
 const testEmailAddress = ref('')
 const logoError = ref('')
 
+// Simple mode confirmation dialog
+const showSimpleModeConfirm = ref(false)
+const pendingSimpleModeValue = ref(false)
+
 // Admin API Key 状态
 const adminApiKeyLoading = ref(true)
 const adminApiKeyExists = ref(false)
@@ -756,7 +826,9 @@ const form = reactive<SystemSettings>({
   // Cloudflare Turnstile
   turnstile_enabled: false,
   turnstile_site_key: '',
-  turnstile_secret_key: ''
+  turnstile_secret_key: '',
+  // Usage mode
+  simple_mode: false
 })
 
 function handleLogoUpload(event: Event) {
@@ -827,6 +899,40 @@ async function saveSettings() {
   }
 }
 
+// Simple mode toggle handlers
+function onSimpleModeToggle(value: boolean) {
+  pendingSimpleModeValue.value = value
+  showSimpleModeConfirm.value = true
+}
+
+async function confirmSimpleModeChange() {
+  showSimpleModeConfirm.value = false
+  form.simple_mode = pendingSimpleModeValue.value
+
+  saving.value = true
+  try {
+    await adminAPI.settings.updateSettings(form)
+    await appStore.fetchPublicSettings(true)
+    appStore.showSuccess(t('admin.settings.settingsSaved'))
+    // Reload page to apply menu changes
+    setTimeout(() => {
+      window.location.reload()
+    }, 500)
+  } catch (error: any) {
+    // Revert on error
+    form.simple_mode = !pendingSimpleModeValue.value
+    appStore.showError(
+      t('admin.settings.failedToSave') + ': ' + (error.message || t('common.unknownError'))
+    )
+  } finally {
+    saving.value = false
+  }
+}
+
+function cancelSimpleModeChange() {
+  showSimpleModeConfirm.value = false
+}
+
 async function testSmtpConnection() {
   testingSmtp.value = true
   try {