Merge pull request #4593 from StarryKira/fix/image-storage-env-unreachable

fix: 异步生图开关配了却不生效（环境变量被静默丢弃 + 迁移到后台开关）

frontend/src/i18n/locales/en/admin/overview.ts

@@ -102,6 +102,19 @@ export default {
         testFailed: 'S3 connection test failed',
         saved: 'S3 configuration saved'
       },
+      imageStorage: {
+        title: 'Async image object storage',
+        description: 'Enables the asynchronous image endpoints and offloads generated images to object storage, keeping only short links in Redis. Shares the S3 client with backups and takes effect on save — no restart needed.',
+        enabled: 'Enable async image tasks',
+        reuseBackupS3: 'Reuse the backup S3 configuration above (different bucket/prefix only)',
+        bucket: 'Bucket',
+        bucketInherited: 'Leave empty to use the backup bucket',
+        prefix: 'Key prefix',
+        publicBaseUrl: 'Public base URL',
+        publicBaseUrlPlaceholder: 'Leave empty to return presigned links',
+        presignExpiryHours: 'Presigned link TTL (hours)',
+        saved: 'Async image object storage saved'
+      },
       schedule: {
         title: 'Scheduled Backup',
         description: 'Configure automatic scheduled backups',

frontend/src/i18n/locales/zh/admin/overview.ts

@@ -102,6 +102,19 @@ export default {
         testFailed: 'S3 连接测试失败',
         saved: 'S3 配置已保存'
       },
+      imageStorage: {
+        title: '异步生图对象存储',
+        description: '开启后，异步生图接口可用，生成结果转存到对象存储，只把短链接写入 Redis。与备份共用同一套 S3 客户端，保存后立即生效，无需重启。',
+        enabled: '启用异步生图',
+        reuseBackupS3: '复用上方备份的 S3 配置（只用不同的存储桶/前缀）',
+        bucket: '存储桶',
+        bucketInherited: '留空则沿用备份存储桶',
+        prefix: 'Key 前缀',
+        publicBaseUrl: '公开访问域名',
+        publicBaseUrlPlaceholder: '留空则返回预签名临时链接',
+        presignExpiryHours: '预签名链接有效期（小时）',
+        saved: '异步生图对象存储配置已保存'
+      },
       schedule: {
         title: '定时备份',
         description: '配置自动定时备份',