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

Add KlingAiping usage-token settlement from upstream final_unit_deduction and duration fallback handling.

Normalize model endpoint config persistence and convert model pricing values between stored USD and display currency in the editor.

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>

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>

Add candidate user selection and explicit_ids batch creation flow for overseas migration. Also add cancellable batches to release selected-user locks and extend backend, frontend, and e2e coverage for the new flow.

Co-Authored-By: Codex <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>

Add unit tests for group ratio, cross-group retry, and price calculation:
- Group ratio CRUD and special ratio override (12 tests)
- HandleGroupRatio with auto-group and special ratios (5 tests)
- ModelPriceHelper with group ratio in price/ratio modes (3 tests)
- Channel selection priority, groups, weighted LB (6 tests)
- RetryParam and AutoGroup service logic (7 tests)

Also restore the group pricing card in model detail SideSheet.

gpt-5.4 returns `arguments` as a JSON object for some tools (e.g.
apply_patch, tool_search), but ResponsesOutput.Arguments was typed as
string, causing json.Unmarshal to fail on every such SSE event.

The failure silently dropped all output_item events and the
response.completed event from the forwarded stream, so:
- the client never received tool call content
- usage/token counts could not be extracted (billed as 0)
- client reported "stream closed before response.completed"

Fix: change Arguments to json.RawMessage and add GetArguments() which
normalises both forms to a plain string (unescapes JSON strings,
returns raw bytes for objects).

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

- UserRatioSection 渠道 ID 输入改为带搜索的下拉选择器
- 使用日志详情、计费过程、展开行均显示用户倍率
- renderLogContent suffix 统一追加，消除 4 处重复
- 提取 dumpUpstreamRequest 辅助函数，debug 日志走 SysLog

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

为每个用户添加独立于全局定价的倍率乘数，支持按 (userId, model, channel) 三维
精确控制用户级别定价。倍率以乘法叠加在现有 modelRatio × groupRatio 之上。

- 新增 user_channel_ratios 表，写入内存缓存（写穿透模式）
- 新增 /api/user_channel_ratio/ CRUD API（AdminAuth）
- 计费路径集成：compatible_handler、PostClaudeConsumeQuota、
  PostWssConsumeQuota、PostAudioConsumeQuota、calculateAudioQuota
- 前端：EditUserModal 内嵌 UserRatioSection 组件
- 修复 Update() 缓存 key 零值 bug（先加载再更新）
- 修复 PreWssConsumeQuota 缺少 UserChannelRatio 导致归零
- 修复 ModelPriceHelperPerCall 缺少默认值 1.0

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

- 提取 TruncateBody 公共函数，截断到 2KB 避免日志过大
- 新增 handleResponsesStreamError 统一 SSE 错误提取逻辑
- 流式/非流式 Responses API 错误路径均捕获 UpstreamBody
- 添加 upstream_body 和 truncate_body 单元测试

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

- 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>

RunQuotaSync 从逐个查询改为批量查询（每批500个），
减少 Master 节点 API 调用次数，提升同步效率。

新增:
- BatchQueryUserQuota 控制器接口
- BatchQueryQuota 客户端方法
- QuotaEntry/BatchQueryQuotaRequest/Response 类型

附带 update-image.sh 部署脚本。

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

- 新增 GET /api/internal/sync/config 接口，Master 下发 MinBalanceThreshold、MaxRetryCount、SyncBatchSize、SyncIntervalSeconds
- Slave 每 5 分钟从 Master 拉取配置并持久化到本地数据库，确保重启不丢失
- 统一 startWorker 支持动态间隔，同步间隔前端修改后无需重启立即生效
- 主节点地址从 TagInput 改为 Form.Input，修复 JSON 数组格式问题
- stringToArray 兼容 JSON 数组和换行分隔两种格式
- 清理根目录测试脚本（已迁移到 test-scripts/）

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

- 新增 settled 状态，防止 SyncManager 在 PreConsume/Settle 之间同步未结算记录
- Settle 使用 AdjustSyncedQuota（增量 gorm.Expr）替代 UpdateSyncedQuota（绝对值），修复并发覆写
- 网络失败时标记所有记录为 failed 并增加 retry_count，避免无限重试
- 新增 ArchiveStalePendingRecords 定时清理崩溃请求的 pending 记录
- 简化 IsSyncedUser/IsLocalUser 移除冗余 id 参数
- Dockerfile 切换华为云 Go 镜像，移除不兼容的 GOEXPERIMENT=greenteagc

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>