feat(密钥): 用户 API 密钥服务端化——V115 按账号绑定存储 + 后台密钥管理页 + 桌面端全站拦截与配置引导

- 新增 usersecret 模块：外观专利/货源查询密钥从本地 localStorage 迁移至 biz_user_api_secret（AES 加密、按 uid 绑定）
- 后台「密钥管理」页：脱敏展示、立即检测、清空；每日 04:30 分布式锁定时巡检
- 桌面端：密钥设置面板走服务端、未配齐引导 /setup-secrets、代理余量展示
- 删除专利汇令牌全链路与密钥保留时长选择器

backend-java/src/main/resources/application.yml

@@ -308,6 +308,16 @@ aiimage:
     archive-connect-timeout-millis: ${AIIMAGE_IMAGE_VIDEO_ARCHIVE_CONNECT_TIMEOUT_MILLIS:10000}
     archive-read-timeout-millis: ${AIIMAGE_IMAGE_VIDEO_ARCHIVE_READ_TIMEOUT_MILLIS:600000}
     archive-max-attempts: ${AIIMAGE_IMAGE_VIDEO_ARCHIVE_MAX_ATTEMPTS:3}
+  user-secret:
+    check-enabled: ${AIIMAGE_USER_SECRET_CHECK_ENABLED:true}
+    check-cron: ${AIIMAGE_USER_SECRET_CHECK_CRON:0 30 4 * * *}
+    check-max-rows: ${AIIMAGE_USER_SECRET_CHECK_MAX_ROWS:500}
+    check-budget-minutes: ${AIIMAGE_USER_SECRET_CHECK_BUDGET_MINUTES:20}
+    # 检测出口代理提取链接：留空=直连；配置后检测优先经代理、失败回退直连
+    check-proxy-extract-url: ${AIIMAGE_USER_SECRET_CHECK_PROXY_EXTRACT_URL:}
+    jikip-balance-url: ${AIIMAGE_USER_SECRET_JIKIP_BALANCE_URL:https://api.jikip.com/find-balance}
+    jikip-plan-id: ${AIIMAGE_USER_SECRET_JIKIP_PLAN_ID:}
+    jikip-user-id: ${AIIMAGE_USER_SECRET_JIKIP_USER_ID:}
   security:
     shop-credential-key: ${AIIMAGE_SHOP_CREDENTIAL_KEY:change-me-shop-credential-key}
     internal-token: ${AIIMAGE_INTERNAL_TOKEN:}