fix: 兼容像素分辨率参数

apps/api/internal/runner/param_processor_media.go

@@ -207,6 +207,14 @@ func (imageSizeProcessor) Process(params map[string]any, modelType string, conte
 	width, height = constrainImageDimensions(width, height, capability)
 	params["width"] = width
 	params["height"] = height
+	if stringFromAny(params["aspect_ratio"]) == "" {
+		aspectRatio := aspectRatioFromDimensions(width, height)
+		allowed := aspectRatioAllowed(capability["aspect_ratio_allowed"], firstNonEmptyString(stringFromAny(params["resolution"]), context.resolution))
+		if processed, ok := validateAndAdjustAspectRatio(aspectRatio, capability, allowed); ok && processed != "" {
+			params["aspect_ratio"] = processed
+			context.aspectRatio = processed
+		}
+	}
 	resolution := normalizeImageResolutionForCapability(firstNonEmptyString(stringFromAny(params["resolution"]), context.resolution), width, height, capability)
 	if resolution != "" {
 		params["resolution"] = resolution
@@ -248,7 +256,10 @@ func imageDimensionsFromParams(params map[string]any) (int, int, bool) {
 	if width > 0 && height > 0 {
 		return width, height, true
 	}
-	return parsePixelSizeString(stringFromAny(params["size"]))
+	if width, height, ok := parsePixelSizeString(stringFromAny(params["size"])); ok {
+		return width, height, true
+	}
+	return parsePixelSizeString(stringFromAny(params["resolution"]))
 }
 
 func imageSizeCapabilityConfigured(capability map[string]any) bool {
@@ -431,6 +442,30 @@ func imageResolutionFromDimensions(width int, height int) string {
 	}
 }
 
+func aspectRatioFromDimensions(width int, height int) string {
+	if width <= 0 || height <= 0 {
+		return ""
+	}
+	divisor := gcd(width, height)
+	return fmt.Sprintf("%d:%d", width/divisor, height/divisor)
+}
+
+func gcd(a int, b int) int {
+	if a < 0 {
+		a = -a
+	}
+	if b < 0 {
+		b = -b
+	}
+	for b != 0 {
+		a, b = b, a%b
+	}
+	if a == 0 {
+		return 1
+	}
+	return a
+}
+
 func closestImageResolution(target string, allowed []string) string {
 	order := []string{"1K", "2K", "3K", "4K", "8K"}
 	targetIndex := indexOfString(order, target)