fix(ark-assets): 方舟素材库 - 阻止图片 Agent Plan 误用 asset:// 可信素材

Agent Plan Seedream 与 Seedance 共用 /api/plan/v3，BaseURL 判断会把图片生成误判为视频可信素材路径。仅视频 mode/协议才同步或提交 asset://。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/internal/app/provider_ark_private_assets.go

@@ -47,7 +47,8 @@ func withoutProviderAnalytics(ctx context.Context) context.Context {
 }
 
 func (s *Service) prepareArkPrivateAssetReferences(ctx context.Context, userID string, input *canvasGenerationInput) error {
-	if input == nil || !isArkPrivateAssetVideoConfig(input.Config) || !parseBool(input.Config.ArkPrivateAssetUpload, true) {
+	// 可信素材 asset:// 仅方舟视频协议支持；Agent Plan Seedream 等图片渠道不能上传或改写。
+	if input == nil || input.Mode != "video" || !isArkPrivateAssetVideoConfig(input.Config) || !parseBool(input.Config.ArkPrivateAssetUpload, true) {
 		return nil
 	}
 	hasOwnedReference := false
@@ -107,7 +108,12 @@ func (s *Service) prepareArkPrivateAssetReferences(ctx context.Context, userID s
 }
 
 func isArkPrivateAssetVideoConfig(config providerConfig) bool {
-	return config.InterfaceType == string(model.ChannelInterfaceVolcengineArkVideo) || isArkPlanVideoConfig(config)
+	iface := strings.TrimSpace(config.InterfaceType)
+	// Agent Plan 图片与视频共用 /api/plan/v3；图片协议不得进入可信素材同步。
+	if iface == string(model.ChannelInterfaceVolcengineArkImage) || iface == "volcengine-ark-agent-plan-image" {
+		return false
+	}
+	return iface == string(model.ChannelInterfaceVolcengineArkVideo) || iface == "volcengine-ark-agent-plan-video" || isArkPlanVideoConfig(config)
 }
 
 func arkPrivateAssetAutomaticSyncEnabled(setting arkPrivateAssetSettingValue) (bool, error) {

backend/internal/app/provider_test.go

@@ -2213,6 +2213,48 @@ func TestArkPlanConfigStaysSeparateFromSeedanceVideosEndpoint(t *testing.T) {
 	}
 }
 
+func TestArkPlanImageConfigDoesNotUseVideoAssetPath(t *testing.T) {
+	imageConfig := providerConfig{
+		InterfaceType: "volcengine-ark-agent-plan-image",
+		BaseURL:       "https://ark.cn-beijing.volces.com/api/plan/v3",
+		Model:         "doubao-seedream-4-0-250828",
+	}
+	if isArkPlanVideoConfig(imageConfig) {
+		t.Fatal("agent plan image must not match isArkPlanVideoConfig")
+	}
+	if isArkPrivateAssetVideoConfig(imageConfig) {
+		t.Fatal("agent plan image must not trigger ark private asset sync")
+	}
+	if isSeedanceVideoConfig(imageConfig) {
+		t.Fatal("agent plan image must not match isSeedanceVideoConfig")
+	}
+
+	videoConfig := providerConfig{
+		InterfaceType: "volcengine-ark-agent-plan-video",
+		BaseURL:       "https://ark.cn-beijing.volces.com/api/plan/v3",
+		Model:         "doubao-seedance-1-5-pro-251215",
+	}
+	if !isArkPlanVideoConfig(videoConfig) || !isArkPrivateAssetVideoConfig(videoConfig) {
+		t.Fatal("agent plan video should keep video/asset path")
+	}
+}
+
+func TestPrepareArkPrivateAssetReferencesSkipsImageMode(t *testing.T) {
+	svc := &Service{}
+	err := svc.prepareArkPrivateAssetReferences(context.Background(), "user-1", &canvasGenerationInput{
+		Mode: "image",
+		Config: providerConfig{
+			InterfaceType:         "volcengine-ark-agent-plan-image",
+			BaseURL:               "https://ark.cn-beijing.volces.com/api/plan/v3",
+			ArkPrivateAssetUpload: "true",
+		},
+		ReferenceImages: []providerMedia{{StorageKey: "resource:res-1", URL: "https://example.com/ref.png"}},
+	})
+	if err != nil {
+		t.Fatalf("prepareArkPrivateAssetReferences() error = %v", err)
+	}
+}
+
 func TestVolcengineArkVideoProtocolUsesContentTaskAndDownloadsResult(t *testing.T) {
 	t.Setenv("CANVAS_ALLOW_PRIVATE_UPSTREAMS", "true")
 	paths := make([]string, 0, 3)

backend/internal/app/provider_video_options.go

@@ -5,6 +5,8 @@ import (
 	"strconv"
 	"strings"
 	"time"
+
+	"infinite-canvas/backend/internal/model"
 )
 
 func isPublicMediaURL(value string) bool {
@@ -13,8 +15,8 @@ func isPublicMediaURL(value string) bool {
 }
 
 func isSeedanceVideoConfig(config providerConfig) bool {
-	model := strings.ToLower(config.Model)
-	return strings.Contains(model, "seedance") || strings.Contains(model, "doubao-seedance") || isArkPlanVideoConfig(config)
+	modelName := strings.ToLower(config.Model)
+	return strings.Contains(modelName, "seedance") || strings.Contains(modelName, "doubao-seedance") || isArkPlanVideoConfig(config)
 }
 
 func isGrokVideoConfig(config providerConfig) bool {
@@ -22,7 +24,15 @@ func isGrokVideoConfig(config providerConfig) bool {
 }
 
 func isArkPlanVideoConfig(config providerConfig) bool {
-	return strings.Contains(strings.ToLower(config.BaseURL), "/api/plan/v3")
+	if !strings.Contains(strings.ToLower(config.BaseURL), "/api/plan/v3") {
+		return false
+	}
+	// Agent Plan 图片与视频共用 /api/plan/v3；按协议排除图片，避免 Seedream 误走视频/可信素材路径。
+	iface := strings.TrimSpace(config.InterfaceType)
+	if iface == string(model.ChannelInterfaceVolcengineArkImage) || iface == "volcengine-ark-agent-plan-image" {
+		return false
+	}
+	return true
 }
 
 func normalizeImageQuality(value string) string {