fix(agent): Agent 对话 - 修复无效 URL 与上游取消日志

backend/internal/service/provider.go

@@ -3054,12 +3054,11 @@ func recordProviderRequest(req *http.Request, startedAt time.Time, statusCode in
 		return
 	}
 	status := model.ApiCallStatusSucceeded
+	errorCode := ""
 	errorText := ""
 	if requestErr != nil || statusCode < 200 || statusCode >= 300 {
 		status = model.ApiCallStatusFailed
-		if requestErr != nil {
-			errorText = safeProviderLogError(requestErr)
-		}
+		errorCode, errorText = providerRequestErrorDetails(requestErr)
 	}
 	requestKind := providerRequestKind(req.Method, req.URL.Path)
 	if metadata.RequestKind != "" {
@@ -3075,7 +3074,7 @@ func recordProviderRequest(req *http.Request, startedAt time.Time, statusCode in
 		RequestKind: requestKind, Billable: req.Method == http.MethodPost && requestKind != "cancel",
 		APIFormat: apiFormat, Method: req.Method, Path: req.URL.Path, Model: metadata.Model,
 		Status: status, StatusCode: statusCode, DurationMs: time.Since(startedAt).Milliseconds(),
-		Error: errorText, ConcurrencyLimit: metadata.ConcurrencyLimit, UpstreamURL: req.URL.Scheme + "://" + req.URL.Host + req.URL.Path,
+		ErrorCode: errorCode, Error: errorText, ConcurrencyLimit: metadata.ConcurrencyLimit, UpstreamURL: req.URL.Scheme + "://" + req.URL.Host + req.URL.Path,
 		ProviderRequestID: metadata.ProviderRequestID, RequestContentType: req.Header.Get("Content-Type"), RequestBody: requestPayloadForLog(req), ResponseBody: SanitizeAPICallPayload(responseBody, ""),
 	}
 	channelSlotFailure := false
@@ -3102,6 +3101,19 @@ func recordProviderRequest(req *http.Request, startedAt time.Time, statusCode in
 	}
 }
 
+func providerRequestErrorDetails(err error) (string, string) {
+	if err == nil {
+		return "", ""
+	}
+	if errors.Is(err, context.Canceled) {
+		return "request_cancelled", "任务取消，中断上游请求"
+	}
+	if errors.Is(err, context.DeadlineExceeded) {
+		return "upstream_timeout", "等待上游响应超时"
+	}
+	return "", safeProviderLogError(err)
+}
+
 func safeProviderLogError(err error) string {
 	var httpErr providerHTTPError
 	if errors.As(err, &httpErr) {

backend/internal/service/provider_test.go

@@ -21,6 +21,27 @@ import (
 const testReferenceImageDataURL = "data:image/png;base64,aGVsbG8="
 const testGeminiReferenceImageDataURL = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNk+A8AAQUBAScY42YAAAAASUVORK5CYII="
 
+func TestProviderRequestErrorDetails(t *testing.T) {
+	tests := []struct {
+		name string
+		err  error
+		code string
+		text string
+	}{
+		{name: "cancelled", err: context.Canceled, code: "request_cancelled", text: "任务取消，中断上游请求"},
+		{name: "timeout", err: context.DeadlineExceeded, code: "upstream_timeout", text: "等待上游响应超时"},
+		{name: "network error", err: errors.New("dial tcp: connection refused"), text: "dial tcp: connection refused"},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			code, text := providerRequestErrorDetails(tt.err)
+			if code != tt.code || text != tt.text {
+				t.Fatalf("providerRequestErrorDetails() = (%q, %q), want (%q, %q)", code, text, tt.code, tt.text)
+			}
+		})
+	}
+}
+
 func TestWriteMediaPartSanitizesFilenameAndSetsMimeType(t *testing.T) {
 	var body bytes.Buffer
 	writer := multipart.NewWriter(&body)