fix(网关): 修复 golangci-lint

backend/internal/service/gateway_service.go

@@ -439,7 +439,7 @@ func toPascalCase(value string) string {
 		}
 		runes := []rune(lower)
 		runes[0] = unicode.ToUpper(runes[0])
-		builder.WriteString(string(runes))
+		_, _ = builder.WriteString(string(runes))
 	}
 	return builder.String()
 }
@@ -723,12 +723,8 @@ func normalizeClaudeOAuthRequestBody(body []byte, modelID string, opts claudeOAu
 		}
 	}
 
-	if _, ok := req["temperature"]; ok {
 	delete(req, "temperature")
-	}
-	if _, ok := req["tool_choice"]; ok {
 	delete(req, "tool_choice")
-	}
 
 	newBody, err := json.Marshal(req)
 	if err != nil {