fix(canvas): 视频设置 - 按渠道能力隐藏尺寸并联动分辨率宽高

backend/internal/service/model_capability.go

@@ -532,8 +532,12 @@ func validateVideoCapabilityConfig(value *VideoCapabilityConfig) error {
 	if err := validateVideoDuration(value.Duration); err != nil {
 		return err
 	}
-	if len(value.Ratios) == 0 || strings.TrimSpace(value.DefaultRatio) == "" || !containsCapabilityString(value.Ratios, value.DefaultRatio) {
-		return BadAuthRequest("请至少配置一个画面比例，并选择默认比例")
+	if len(value.Ratios) == 0 {
+		if strings.TrimSpace(value.DefaultRatio) != "" {
+			return BadAuthRequest("未配置画面比例时不能设置默认比例")
+		}
+	} else if strings.TrimSpace(value.DefaultRatio) == "" || !containsCapabilityString(value.Ratios, value.DefaultRatio) {
+		return BadAuthRequest("默认画面比例必须属于支持值")
 	}
 	if len(value.Resolutions) == 0 {
 		if strings.TrimSpace(value.DefaultResolution) != "" {

backend/internal/service/model_capability_test.go

@@ -237,6 +237,25 @@ func TestNormalizeVideoCapabilityAllowsOmittedResolution(t *testing.T) {
 	}
 }
 
+func TestNormalizeVideoCapabilityAllowsOmittedRatio(t *testing.T) {
+	profile := DefaultModelCapabilityConfigForModel("autodl-comfyui", "minimax_h3_lightx2v_no_pic").Video
+	profile.Ratios = nil
+	profile.DefaultRatio = ""
+	profile.Resolutions = []string{"480p竖", "480p横"}
+	profile.DefaultResolution = "480p竖"
+
+	result, err := NormalizeModelCapabilityConfig("video", "autodl-comfyui", &ModelCapabilityConfig{Version: 1, Video: profile})
+	if err != nil {
+		t.Fatalf("NormalizeModelCapabilityConfig() error = %v", err)
+	}
+	if result.Video == nil || len(result.Video.Ratios) != 0 || result.Video.DefaultRatio != "" {
+		t.Fatalf("normalized video ratios = %#v", result.Video)
+	}
+	if err := validateVideoTask(result.Video, canvasGenerationInput{Config: providerConfig{Model: "minimax_h3_lightx2v_no_pic", VideoSeconds: "6", VQuality: "480p竖"}}); err != nil {
+		t.Fatalf("validateVideoTask() error = %v", err)
+	}
+}
+
 func TestCapabilitySpecFromModelCapabilityConfigProjectsImageSizeOnce(t *testing.T) {
 	config := &ModelCapabilityConfig{
 		Version: 1,