feat: OAuth Token 自动刷新调度、OAuth 对话框优化及 OpenAI CLI normalizer 重构

- 系统设置新增 OAuth Token 自动刷新任务开关，支持动态调度
- OAuth 授权对话框简化步骤布局，移除编号圆圈样式
- 重构 OpenAI CLI normalizer：将 if-else 链替换为事件处理器映射表，
  将 stream_event_from_internal 拆分为独立方法
- 维护调度器在禁用刷新时移除已调度的 job
- .gitignore 新增 CLIProxyAPI/ 和 sub2api/ 排除项
- 补充 noop/unknown 事件处理器的测试覆盖

frontend/src/features/providers/components/OAuthAccountDialog.vue

@@ -6,7 +6,7 @@
     size="md"
     @update:model-value="handleDialogUpdate"
   >
-    <div class="space-y-6">
+    <div class="space-y-5">
       <!-- 加载中 -->
       <div
         v-if="oauth.starting && !oauth.authorization_url"
@@ -21,22 +21,14 @@
       <!-- 授权流程 -->
       <template v-else-if="oauth.authorization_url">
         <!-- 步骤 1: 打开授权链接 -->
-        <div class="space-y-3">
-          <div class="flex items-center gap-2">
-            <div class="w-5 h-5 rounded-full bg-primary text-primary-foreground flex items-center justify-center text-xs font-medium shrink-0">
-              1
-            </div>
-            <span class="text-sm font-medium">打开授权链接</span>
-          </div>
-          <p class="text-xs text-muted-foreground pl-7">
+        <div class="space-y-2">
+          <p class="text-xs font-medium text-muted-foreground uppercase tracking-wider">
+            第一步 · 前往授权
+          </p>
+          <p class="text-xs text-muted-foreground">
             点击下方按钮在浏览器中完成登录授权
           </p>
-          <div class="ml-7 p-2.5 rounded-md bg-muted/50 border border-border/50">
-            <p class="text-xs font-mono text-muted-foreground break-all line-clamp-3 leading-relaxed">
-              {{ oauth.authorization_url }}
-            </p>
-          </div>
-          <div class="flex gap-2 pl-7">
+          <div class="flex gap-2 pt-1">
             <Button
               size="sm"
               :disabled="oauthBusy"
@@ -57,28 +49,26 @@
           </div>
         </div>
 
+        <Separator />
+
         <!-- 步骤 2: 粘贴回调地址 -->
-        <div class="space-y-3">
-          <div class="flex items-center gap-2">
-            <div class="w-5 h-5 rounded-full bg-muted text-muted-foreground flex items-center justify-center text-xs font-medium shrink-0">
-              2
-            </div>
-            <span class="text-sm font-medium">粘贴回调地址</span>
-          </div>
-          <p class="text-xs text-muted-foreground pl-7">
+        <div class="space-y-2">
+          <p class="text-xs font-medium text-muted-foreground uppercase tracking-wider">
+            第二步 · 粘贴回调
+          </p>
+          <p class="text-xs text-muted-foreground">
             授权完成后，复制浏览器地址栏的完整 URL 并粘贴到下方
           </p>
-          <div class="pl-7">
+          <div class="pt-1">
             <Textarea
               v-model="oauth.callback_url"
               :disabled="oauthBusy"
               placeholder="http://localhost:xxx/callback?code=..."
-              class="min-h-[80px] text-xs font-mono resize-none"
+              class="min-h-[80px] text-xs font-mono break-all !rounded-xl"
               spellcheck="false"
             />
           </div>
         </div>
-
       </template>
     </div>
 
@@ -93,7 +83,7 @@
         :disabled="!canCompleteOAuth"
         @click="handleCompleteOAuth"
       >
-        {{ oauth.completing ? '验证中...' : '完成授权' }}
+        {{ oauth.completing ? '验证中...' : '验证' }}
       </Button>
     </template>
   </Dialog>
@@ -101,7 +91,7 @@
 
 <script setup lang="ts">
 import { ref, computed, watch } from 'vue'
-import { Dialog, Button, Textarea } from '@/components/ui'
+import { Dialog, Button, Textarea, Separator } from '@/components/ui'
 import { UserPlus, Copy, ExternalLink } from 'lucide-vue-next'
 import { useToast } from '@/composables/useToast'
 import { useClipboard } from '@/composables/useClipboard'

frontend/src/views/admin/SystemSettings.vue

@@ -534,7 +534,7 @@
 
                 <!-- 右侧：时间选择器 + 保存按钮 -->
                 <div
-                  v-if="task.enabled"
+                  v-if="task.enabled && task.hasTimeConfig"
                   class="flex items-center gap-2 shrink-0"
                 >
                   <Clock class="w-4 h-4 text-muted-foreground" />
@@ -995,7 +995,7 @@
 
 <script setup lang="ts">
 import { ref, computed, onMounted } from 'vue'
-import { Download, Upload, CalendarCheck, RotateCcw, Clock, Check, Loader2 } from 'lucide-vue-next'
+import { Download, Upload, CalendarCheck, RotateCcw, RefreshCw, Clock, Check, Loader2 } from 'lucide-vue-next'
 import Button from '@/components/ui/button.vue'
 import Input from '@/components/ui/input.vue'
 import Label from '@/components/ui/label.vue'
@@ -1044,6 +1044,7 @@ interface SystemConfig {
   enable_user_quota_reset: boolean
   user_quota_reset_time: string
   user_quota_reset_interval_days: number
+  enable_oauth_token_refresh: boolean
 }
 
 const basicConfigLoading = ref(false)
@@ -1104,6 +1105,7 @@ const systemConfig = ref<SystemConfig>({
   enable_user_quota_reset: false,
   user_quota_reset_time: '05:00',
   user_quota_reset_interval_days: 1,
+  enable_oauth_token_refresh: true,
 })
 
 // 原始配置值（用于检测变动）
@@ -1215,6 +1217,7 @@ async function loadSystemConfig() {
       'enable_user_quota_reset',
       'user_quota_reset_time',
       'user_quota_reset_interval_days',
+      'enable_oauth_token_refresh',
     ]
 
     for (const key of configs) {
@@ -1423,6 +1426,28 @@ async function handleUserQuotaResetToggle(enabled: boolean) {
   }
 }
 
+async function handleOAuthTokenRefreshToggle(enabled: boolean) {
+  const previousValue = systemConfig.value.enable_oauth_token_refresh
+  systemConfig.value.enable_oauth_token_refresh = enabled
+  try {
+    await adminApi.updateSystemConfig(
+      'enable_oauth_token_refresh',
+      enabled,
+      '是否启用 OAuth Token 自动刷新任务'
+    )
+    success(enabled ? '已启用 OAuth Token 自动刷新' : '已禁用 OAuth Token 自动刷新')
+  } catch (err) {
+    error('保存配置失败')
+    log.error('保存 OAuth Token 自动刷新配置失败:', err)
+    // 回滚状态
+    systemConfig.value.enable_oauth_token_refresh = previousValue
+  }
+}
+
+// OAuth Token 刷新（无时间配置，占位 ref）
+const oauthRefreshHourSelectOpen = ref(false)
+const oauthRefreshMinuteSelectOpen = ref(false)
+
 // 用户配额重置时间相关
 const previousUserQuotaResetTime = ref('')
 const userQuotaResetHourSelectOpen = ref(false)
@@ -1465,6 +1490,7 @@ const scheduledTasks = computed(() => [
     title: 'Provider 自动签到',
     description: '自动执行已配置 Provider 的签到任务',
     enabled: systemConfig.value.enable_provider_checkin,
+    hasTimeConfig: true,
     hour: checkinHour.value,
     minute: checkinMinute.value,
     hourSelectOpen: checkinHourSelectOpen,
@@ -1481,6 +1507,7 @@ const scheduledTasks = computed(() => [
     title: '用户配额自动重置',
     description: '定时将用户已使用配额重置为零',
     enabled: systemConfig.value.enable_user_quota_reset,
+    hasTimeConfig: true,
     hour: userQuotaResetHour.value,
     minute: userQuotaResetMinute.value,
     hourSelectOpen: userQuotaResetHourSelectOpen,
@@ -1491,6 +1518,23 @@ const scheduledTasks = computed(() => [
     onToggle: handleUserQuotaResetToggle,
     onSave: handleQuotaResetConfigSave,
   },
+  {
+    id: 'oauth-token-refresh',
+    icon: RefreshCw,
+    title: 'OAuth Token 自动刷新',
+    description: '主动刷新即将过期的 OAuth Token（动态调度）',
+    enabled: systemConfig.value.enable_oauth_token_refresh,
+    hasTimeConfig: false,
+    hour: '',
+    minute: '',
+    hourSelectOpen: oauthRefreshHourSelectOpen,
+    minuteSelectOpen: oauthRefreshMinuteSelectOpen,
+    updateTime: () => {},
+    hasChanges: false,
+    loading: false,
+    onToggle: handleOAuthTokenRefreshToggle,
+    onSave: () => {},
+  },
 ])
 
 // Provider 签到时间保存