feat(protocol): 可美 KM Seedream - 接入图片生成与编辑

backend/internal/app/model_capability_validate.go

@@ -65,8 +65,8 @@ func validateImageCapabilityConfig(value *ImageCapabilityConfig) error {
 	}
 	seenPresets := make(map[string]bool)
 	for _, preset := range value.Size.Presets {
-		if preset.Tier != "1k" && preset.Tier != "2k" && preset.Tier != "4k" {
-			return BadAuthRequest("图片分辨率档位仅支持 1K、2K、4K")
+		if preset.Tier != "1k" && preset.Tier != "1.5k" && preset.Tier != "2k" && preset.Tier != "4k" {
+			return BadAuthRequest("图片分辨率档位仅支持 1K、1.5K、2K、4K")
 		}
 		parts := strings.Split(preset.Ratio, ":")
 		if len(parts) != 2 {
@@ -416,6 +416,8 @@ func imageResolutionTier(quality string) string {
 	switch strings.ToLower(strings.TrimSpace(quality)) {
 	case "1k", "low":
 		return "1k"
+	case "1.5k":
+		return "1.5k"
 	case "2k", "medium":
 		return "2k"
 	case "4k", "high":