feat: 易支付积分充值 + 站内公告 + OpenAI 视频修复 + grok/adobe 失败处理

充值/订单(易支付 mapi):
- 订单表 + 30 分钟自动取消;支付弹窗(二维码/跳转监控、倒计时、轮询、5s 倒计时关闭)
- 系统设置可配:开关/商户ID/密钥/支付地址(根地址拼 /mapi)/支付方式/最低额/积分比例(默认 1元=100积分)
- 异步通知 MD5 验签、幂等到账;用户累计充值;前台/后台订单页(筛选+搜索+分页,前后台分风格);用户管理累计充值列

站内公告:
- Markdown 公告,登录用户首次访问/刷新弹出;内容哈希做版本,改了就重新推;管理员不弹;空内容=下线

OpenAI 视频(/v1/videos)修复:
- /content 拿不到视频:grok 资源 URL 需鉴权,改为用生成账号 token 取流;adobe/runway 公开 URL 直代理(不存 RustFS)
- size→分辨率用短边判定(1280x720 = 720p,之前误判 1080p 被拒)

失败处理:
- grok 429「Too many requests」/403 anti-bot 改判临时错误(不再误封号),真额度耗尽才算 quota
- adobe 视频 408 / system under load 归为临时错误 → tempAsDead 封号

其它:
- 充值默认关闭;签到格子浅色可见;登录验证码按钮浅色可读;并发/账户信息展示
- 创作记录/画图台只显示画图台作品(排除 API);日志页 API 视频预览显示 —
- 视频去画中画/下载/投屏(全局);图片缩略图改背景图规避 Edge 视觉搜索
- 订单/兑换码/配置/日志菜单文案与图标;充值版块样式

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/internal/http/router/router.go

@@ -26,6 +26,8 @@ type Handlers struct {
 	UserGen       *handler.UserGenerationHandler
 	ProviderAdmin *handler.ProviderAdminHandler
 	ConcGroups    *handler.ConcurrencyGroupHandler
+	Announcement  *handler.AnnouncementHandler
+	Payment       *handler.PaymentHandler
 }
 
 func New(cfg *config.Config, auth *service.AuthService, handlers Handlers) *gin.Engine {
@@ -62,6 +64,9 @@ func New(cfg *config.Config, auth *service.AuthService, handlers Handlers) *gin.
 		publicAdmin.GET("/video-presets", handlers.UserGen.VideoPresets)
 		publicAdmin.GET("/catalog", handlers.UserGen.Catalog)
 		publicAdmin.GET("/models", handlers.UserGen.Models)
+		// 易支付 async notify — called server-to-server by the pay platform, no auth.
+		publicAdmin.GET("/pay/notify", handlers.Payment.Notify)
+		publicAdmin.POST("/pay/notify", handlers.Payment.Notify)
 	}
 
 	authGroup := engine.Group("/admin/api/auth")
@@ -82,6 +87,13 @@ func New(cfg *config.Config, auth *service.AuthService, handlers Handlers) *gin.
 		userAuthed.POST("/test", handlers.UserGen.Test)
 		userAuthed.GET("/jobs/mine", handlers.UserGen.MyJobs)
 		userAuthed.GET("/my-images", handlers.UserGen.MyImages)
+		userAuthed.GET("/announcement", handlers.Announcement.Get)
+		userAuthed.POST("/announcement/seen", handlers.Announcement.MarkSeen)
+		userAuthed.GET("/pay/config", handlers.Payment.Config)
+		userAuthed.POST("/pay/recharge", handlers.Payment.Recharge)
+		userAuthed.GET("/pay/orders", handlers.Payment.MyOrders)
+		userAuthed.GET("/pay/orders/:id", handlers.Payment.OrderStatus)
+		userAuthed.POST("/pay/orders/:id/continue", handlers.Payment.ContinueOrder)
 	}
 
 	authed := engine.Group("/admin/api")
@@ -102,6 +114,7 @@ func New(cfg *config.Config, auth *service.AuthService, handlers Handlers) *gin.
 		authed.PATCH("/concurrency-groups/:id", handlers.ConcGroups.Update)
 		authed.POST("/concurrency-groups/:id/default", handlers.ConcGroups.SetDefault)
 		authed.DELETE("/concurrency-groups/:id", handlers.ConcGroups.Delete)
+		authed.GET("/pay/admin/orders", handlers.Payment.AdminOrders)
 		authed.GET("/cdks", handlers.CDK.List)
 		authed.POST("/cdks", handlers.CDK.Create)
 		authed.POST("/cdks/delete-bulk", handlers.CDK.DeleteBulk)
@@ -158,6 +171,10 @@ func New(cfg *config.Config, auth *service.AuthService, handlers Handlers) *gin.
 			settings.PUT("/logs", handlers.AppSettings.LogsPut)
 			settings.GET("/media", handlers.AppSettings.MediaGet)
 			settings.PUT("/media", handlers.AppSettings.MediaPut)
+			settings.GET("/announcement", handlers.Announcement.AdminGet)
+			settings.PUT("/announcement", handlers.Announcement.AdminPut)
+			settings.GET("/pay", handlers.Payment.SettingsGet)
+			settings.PUT("/pay", handlers.Payment.SettingsSave)
 		}
 	}