The native /api/v3/contents/generations/tasks route was restricted to
the seedance asset channel family (58/60/61); official Volcengine Ark
channels (DoubaoVideo, type 54) could only be reached via the
standardized /v1/video/generations path. Allow type 54 on the native
route in both the distributor and the task retry channel selection,
while keeping it out of the seedance asset binding system.

The taskdoubao adaptor now reuses a pre-parsed task request from the
context (native path) instead of re-parsing the body as TaskSubmitReq,
whose prompt validation would reject the Volcengine-native format.
When req.Prompt is empty (native path), content text items from
metadata are preserved instead of being replaced with an empty prompt;
the standardized path behavior (prompt replaces metadata text) is
unchanged and covered by existing tests.

Co-Authored-By: ZCode <noreply@anthropic.com>

Co-Authored-By: Codex <noreply@anthropic.com>

Co-Authored-By: Codex <noreply@anthropic.com>

- 避免仅编辑展示价格时写入默认真实计费规则
- 将 video-extend 纳入 KlingAiping 原生渠道约束
- 补充相关保存决策、渠道约束和计费展示测试

Co-Authored-By: Codex <noreply@anthropic.com>

- 新增 KlingAiping 渠道 (ChannelTypeKlingAiping = 59)
- 新增 KlingAiping 原生路由 (text2video/image2video/omni-video 等)
- 新增 KlingAiping adaptor (relay/channel/task/kling/aiping/)
- 前端模型定价页面新增「真实计费 / 展示价格」Tab 切换
- 新增 DisplayPricing 组件，支持模型展示价格的增删改
- 新增 displayPricingConfig 工具函数及测试
- 修复 KlingAiping 路由路径匹配与 task 错误响应

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

前端新增 UsageLogExpandedDetail 点击展开面板和 BillingDetailSummary
hover 计费详情，后端修复 per_1m_tokens 任务结算日志的 completion_tokens
从零值改为写入 total_tokens 实际值。新增 taskBillingLogMerge 合并
任务预扣/结算日志。

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

Co-Authored-By: Codex <noreply@anthropic.com>

删除用户渠道倍率（UserChannelRatio）功能，清理全链路相关代码：
后端删除 model/controller/router 层实现，前端删除 UI 组件和计费展示逻辑。
同时恢复 Token 分组选择和价格侧边栏分组过滤器的注释代码。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

删除了用户通过 sk-{key}:{channelId} 指定渠道、Playground 下拉框选择渠道、
以及管理员设置默认渠道 (is_default) 的所有后端代码。

涉及修改：
- middleware/auth.go: 简化 parseTokenKey，移除 specific_channel_id 设置
- middleware/distributor.go: 移除指定渠道分发逻辑、默认通道检查、ModelRequest.ChannelId
- constant/context_key.go: 移除 ContextKeyTokenSpecificChannelId
- controller/playground_channels.go: 整个文件删除
- controller/relay.go: 移除 shouldRetry/shouldRetryTaskRelay 中的指定渠道跳过
- controller/channel.go: 移除 GetUserChannelsForBinding
- controller/channel_pricing.go: 移除 SetDefaultChannel/ClearDefaultChannel
- model/ability.go: 移除 GetModelChannelsForGroup
- model/channel.go: 移除 GetAllChannelsForBinding
- model/channel_pricing.go: 移除默认通道缓存及所有相关函数
- model/pricing.go: 移除 DefaultChannelName 字段
- router/api-router.go: 移除 4 条路由
- i18n: 移除 channel.id_format_error 和 distributor.invalid_channel_id

- 错误日志新增 upstream_request_id（从 Anthropic/OpenAI 响应 header 提取）和 upstream_body（截断 2KB）
- 修复 RelayErrorHandler 内部 WithOpenAIError/NewOpenAIError 分支丢失上游字段的 bug
- Playground 渠道和分组改为通过 X-Channel-Id/X-Group header 传递，而非 body 字段
- Distributor 中间件支持从 header 回退读取 channel_id 和 group

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

实现 Master-Slave 架构的跨区域用户和配额同步功能，支持国内主节点与
海外从节点之间的用户创建推送、余额同步、预扣费批量回传。

主要变更：
- 新增 region_sync 服务层（SyncManager/SyncClient/推送逻辑）
- User 模型扩展 Source/RemoteUserId/SyncedQuota/LastSyncAt 字段
- BillingSession 支持 SyncedUserFunding 资金来源
- 新增 SyncAuth 中间件（X-Sync-API-Key + 常量时间比较）
- 新增 PendingSyncRecord/QuotaSyncLog 数据模型
- 前端新增区域同步配置面板
- 支持 SESSION_NAME 环境变量避免多节点 cookie 冲突

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

This PR fixes three issues:
1. Token bound_channel_id not updating: Add bound field to Update() method
2. Channel pricing quota_type detection: Use QuotaTypeByCall constant instead of magic number 1
3. Log display for ratio-based pricing: Set ModelPrice=-1 for ratio-based pricing

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>