Method resolveResourceMimeType

src/runtime/adapters/feishu.ts:440–445

(
    resource: ResourceDescriptor & { type: FeishuSupportedResourceType },
    filename: string,
  )

      return filename;
    }
    return resource.type === "image" ? `image-${index + 1}.png` : `file-${index + 1}`;
  }

  private resolveResourceMimeType(
    resource: ResourceDescriptor & { type: FeishuSupportedResourceType },
    filename: string,
  ): string | undefined {
    return detectMimeType(filename) || (resource.type === "image" ? "image/png" : undefined);
  }