src/driveApi.js

async function apiFetch(path, { accessToken, idToken }, options = {}) {
  const controller = new AbortController();
  const timeoutId = window.setTimeout(() => controller.abort(), 60000);

  const response = await fetch(path, {
    ...options,
    signal: controller.signal,
    headers: {
      'X-Google-ID-Token': idToken,
      Authorization: `Bearer ${accessToken}`,
      ...(options.headers || {}),
    },
  }).finally(() => window.clearTimeout(timeoutId));

  if (!response.ok) {
    const detail = await response.text();
    throw new Error(`Google Drive API error ${response.status}: ${detail}`);
  }

  return response;
}

export async function listObjFiles(tokens) {
  const response = await apiFetch('/api/files', tokens);
  const data = await response.json();
  return data.files || [];
}

export async function downloadObjText(fileId, tokens) {
  const response = await apiFetch(`/api/files/${encodeURIComponent(fileId)}`, tokens);
  return response.text();
}