Function selectFile

frontend/lib/agentImportUtils.ts:130–145

(
  accept: string = ".json,.zip"
)

 * Returns null if no file was selected
 */
export function selectFile(
  accept: string = ".json,.zip"
): Promise<File | null> {
  return new Promise((resolve) => {
    const fileInput = document.createElement("input");
    fileInput.type = "file";
    fileInput.accept = accept;

    fileInput.onchange = (event) => {
      const file = (event.target as HTMLInputElement).files?.[0];
      resolve(file || null);
    };

    fileInput.click();
  });
}

/**
 * Open import wizard with file selection