补全图像尺寸预处理约束

apps/api/internal/runner/param_processor_utils.go

@@ -464,6 +464,46 @@ func parsePositiveFloat(value string) float64 {
 	return out
 }
 
+func positiveFloatFromAny(value any) float64 {
+	switch typed := value.(type) {
+	case int:
+		return float64(typed)
+	case int64:
+		return float64(typed)
+	case float64:
+		return typed
+	case string:
+		return parsePositiveFloat(typed)
+	default:
+		return 0
+	}
+}
+
+func positiveIntegerFromAny(value any) int {
+	number := positiveFloatFromAny(value)
+	if number <= 0 {
+		return 0
+	}
+	return int(math.Round(number))
+}
+
+func parsePixelSizeString(value string) (int, int, bool) {
+	value = strings.TrimSpace(strings.ToLower(value))
+	if value == "" || isEmptyParamString(value) {
+		return 0, 0, false
+	}
+	parts := strings.Split(value, "x")
+	if len(parts) != 2 {
+		return 0, 0, false
+	}
+	width := positiveIntegerFromAny(parts[0])
+	height := positiveIntegerFromAny(parts[1])
+	if width <= 0 || height <= 0 {
+		return 0, 0, false
+	}
+	return width, height, true
+}
+
 func isEmptyParamString(value string) bool {
 	normalized := strings.ToLower(strings.TrimSpace(value))
 	return normalized == "null" || normalized == "undefined"