fix: resolve lint errors from CI

- Check error return from os.RemoveAll in e2e TestMain
- Check error return from c.Close in NewClientWithDialer
- Run gofumpt formatting

Author: nnemirovsky

cmd/iwdp-cli/main.go

@@ -451,9 +451,9 @@ func cmdNetwork(ctx context.Context, args []string) {
 
 	client.OnEvent("Network.loadingFailed", func(method string, params json.RawMessage) {
 		var evt struct {
-			RequestID    string `json:"requestId"`
-			ErrorText    string `json:"errorText"`
-			Canceled     bool   `json:"canceled"`
+			RequestID string `json:"requestId"`
+			ErrorText string `json:"errorText"`
+			Canceled  bool   `json:"canceled"`
 		}
 		if err := json.Unmarshal(params, &evt); err != nil {
 			return

e2e/main_test.go

@@ -15,7 +15,7 @@ func trackTempDir(dir string) {
 func TestMain(m *testing.M) {
 	code := m.Run()
 	for _, dir := range tempDirs {
-		os.RemoveAll(dir)
+		_ = os.RemoveAll(dir)
 	}
 	os.Exit(code)
 }

internal/tools/tools_simulator_test.go

@@ -355,7 +355,6 @@ func TestSim_GetMatchedStyles(t *testing.T) {
 	}
 }
 
-
 func TestSim_ForcePseudoState(t *testing.T) {
 	client := getSimClient(t)
 	ctx, cancel := simCtx()

internal/webkit/client.go

@@ -69,7 +69,7 @@ func NewClientWithDialer(ctx context.Context, wsURL string, dialer *websocket.Di
 	case <-time.After(100 * time.Millisecond):
 		// No Target event — use direct mode (e.g., mock servers in tests)
 	case <-ctx.Done():
-		c.Close()
+		_ = c.Close()
 		return nil, ctx.Err()
 	}