同步官方v0.9.0-alpha.8，保留自定义Footer和Claude穿透功能

- 更新到官方最新版本 (c826d06d)
- 保留自定义页脚品牌信息 (听泉claude提供)
- 保留Claude渠道请求穿透功能，支持PassThroughRequestEnabled设置
- 添加补丁文件便于后续维护

🤖 Generated with [Claude Code](https://claude.ai/code)

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

patches/claude-passthrough.patch

@@ -0,0 +1,45 @@
+diff --git a/relay/channel/claude/adaptor.go b/relay/channel/claude/adaptor.go
+index 540742d6..c715c0c9 100644
+--- a/relay/channel/claude/adaptor.go
++++ b/relay/channel/claude/adaptor.go
+@@ -55,14 +55,34 @@ func (a *Adaptor) GetRequestURL(info *relaycommon.RelayInfo) (string, error) {
+ }
+ 
+ func (a *Adaptor) SetupRequestHeader(c *gin.Context, req *http.Header, info *relaycommon.RelayInfo) error {
+-	channel.SetupApiRequestHeader(info, c, req)
++	if model_setting.GetGlobalSettings().PassThroughRequestEnabled {
++		// 穿透模式：直接复制原始请求头，但跳过系统级头信息
++		for key, values := range c.Request.Header {
++			keyLower := strings.ToLower(key)
++			if keyLower == "host" || keyLower == "content-length" || keyLower == "connection" {
++				continue
++			}
++			for _, value := range values {
++				req.Add(key, value)
++			}
++		}
++	} else {
++		// 非穿透模式：使用通用设置
++		channel.SetupApiRequestHeader(info, c, req)
++	}
++	
++	// 无论哪种模式都需要设置正确的API密钥
+ 	req.Set("x-api-key", info.ApiKey)
+-	anthropicVersion := c.Request.Header.Get("anthropic-version")
+-	if anthropicVersion == "" {
+-		anthropicVersion = "2023-06-01"
++	
++	if !model_setting.GetGlobalSettings().PassThroughRequestEnabled {
++		// 非穿透模式才强制设置这些头
++		anthropicVersion := c.Request.Header.Get("anthropic-version")
++		if anthropicVersion == "" {
++			anthropicVersion = "2023-06-01"
++		}
++		req.Set("anthropic-version", anthropicVersion)
++		model_setting.GetClaudeSettings().WriteHeaders(info.OriginModelName, req)
+ 	}
+-	req.Set("anthropic-version", anthropicVersion)
+-	model_setting.GetClaudeSettings().WriteHeaders(info.OriginModelName, req)
+ 	return nil
+ }
+