feat: add sync image heartbeat toggle

frontend/src/views/admin/SystemSettings.vue

@@ -63,6 +63,7 @@
             :password-policy-level="systemConfig.password_policy_level"
             :auto-delete-expired-keys="systemConfig.auto_delete_expired_keys"
             :enable-format-conversion="systemConfig.enable_format_conversion"
+            :enable-openai-image-sync-heartbeat="systemConfig.enable_openai_image_sync_heartbeat"
             :loading="basicConfigLoading"
             :has-changes="hasBasicConfigChanges"
             @save="saveBasicConfig"
@@ -72,6 +73,7 @@
             @update:password-policy-level="systemConfig.password_policy_level = $event"
             @update:auto-delete-expired-keys="systemConfig.auto_delete_expired_keys = $event"
             @update:enable-format-conversion="systemConfig.enable_format_conversion = $event"
+            @update:enable-openai-image-sync-heartbeat="systemConfig.enable_openai_image_sync_heartbeat = $event"
           />
 
           <!-- 请求记录配置 -->

frontend/src/views/admin/system-settings/BasicConfigSection.vue

@@ -150,6 +150,27 @@
           </div>
         </div>
       </div>
+
+      <div class="flex items-center h-full">
+        <div class="flex items-center space-x-2">
+          <Checkbox
+            id="enable-openai-image-sync-heartbeat"
+            :checked="enableOpenaiImageSyncHeartbeat"
+            @update:checked="$emit('update:enableOpenaiImageSyncHeartbeat', $event)"
+          />
+          <div>
+            <Label
+              for="enable-openai-image-sync-heartbeat"
+              class="cursor-pointer"
+            >
+              同步生图心跳
+            </Label>
+            <p class="text-xs text-muted-foreground">
+              开启后同步生图外层 HTTP 状态固定为 200，上游失败需读取响应体 error.upstream_status
+            </p>
+          </div>
+        </div>
+      </div>
     </div>
   </CardSection>
 </template>
@@ -173,6 +194,7 @@ defineProps<{
   passwordPolicyLevel: string
   autoDeleteExpiredKeys: boolean
   enableFormatConversion: boolean
+  enableOpenaiImageSyncHeartbeat: boolean
   loading: boolean
   hasChanges: boolean
 }>()
@@ -185,5 +207,6 @@ defineEmits<{
   'update:passwordPolicyLevel': [value: string]
   'update:autoDeleteExpiredKeys': [value: boolean]
   'update:enableFormatConversion': [value: boolean]
+  'update:enableOpenaiImageSyncHeartbeat': [value: boolean]
 }>()
 </script>

frontend/src/views/admin/system-settings/composables/useSystemConfig.ts

@@ -19,6 +19,8 @@ export interface SystemConfig {
   auto_delete_expired_keys: boolean
   // 格式转换
   enable_format_conversion: boolean
+  // 同步生图心跳
+  enable_openai_image_sync_heartbeat: boolean
   // 请求记录
   request_record_level: string
   max_request_body_size: number
@@ -58,6 +60,8 @@ const CONFIG_KEYS = [
   'auto_delete_expired_keys',
   // 格式转换
   'enable_format_conversion',
+  // 同步生图心跳
+  'enable_openai_image_sync_heartbeat',
   // 请求记录
   'request_record_level',
   'max_request_body_size',
@@ -98,6 +102,8 @@ function createDefaultConfig(): SystemConfig {
     auto_delete_expired_keys: false,
     // 格式转换
     enable_format_conversion: false,
+    // 同步生图心跳
+    enable_openai_image_sync_heartbeat: false,
     // 请求记录
     request_record_level: 'basic',
     max_request_body_size: 1048576,
@@ -160,7 +166,8 @@ export function useSystemConfig() {
       systemConfig.value.enable_registration !== originalConfig.value.enable_registration ||
       systemConfig.value.password_policy_level !== originalConfig.value.password_policy_level ||
       systemConfig.value.auto_delete_expired_keys !== originalConfig.value.auto_delete_expired_keys ||
-      systemConfig.value.enable_format_conversion !== originalConfig.value.enable_format_conversion
+      systemConfig.value.enable_format_conversion !== originalConfig.value.enable_format_conversion ||
+      systemConfig.value.enable_openai_image_sync_heartbeat !== originalConfig.value.enable_openai_image_sync_heartbeat
     )
   })
 
@@ -340,6 +347,11 @@ export function useSystemConfig() {
           value: systemConfig.value.enable_format_conversion,
           description: '全局格式转换开关：开启时强制允许所有提供商的格式转换',
         },
+        {
+          key: 'enable_openai_image_sync_heartbeat',
+          value: systemConfig.value.enable_openai_image_sync_heartbeat,
+          description: '同步生图心跳开关：开启后外层 HTTP 状态固定为 200，上游失败写入响应体',
+        },
       ]
 
       await Promise.all(
@@ -356,6 +368,8 @@ export function useSystemConfig() {
           systemConfig.value.auto_delete_expired_keys
         originalConfig.value.enable_format_conversion =
           systemConfig.value.enable_format_conversion
+        originalConfig.value.enable_openai_image_sync_heartbeat =
+          systemConfig.value.enable_openai_image_sync_heartbeat
       }
       success('基础配置已保存')
     } catch (err) {