Merge pull request #316 from cyhhao/fix/claude-oauth-compat

fix(网关): 完善 Claude OAuth/Claude Code 兼容

backend/internal/handler/gateway_handler.go

@@ -779,6 +779,9 @@ func (h *GatewayHandler) CountTokens(c *gin.Context) {
 		return
 	}
 
+	// 检查是否为 Claude Code 客户端，设置到 context 中
+	SetClaudeCodeClientContext(c, body)
+
 	setOpsRequestContext(c, "", false, body)
 
 	parsedReq, err := service.ParseGatewayRequest(body)