feat: add shared API utilities for handling requests and responses

- Introduced `shared.ts` with utility functions for API interactions, including JSON parsing, error handling, and content disposition parsing. - Added `vault.ts` to manage vault-related operations such as folder and cipher management, including creation, deletion, and bulk operations. - Implemented encryption and decryption methods for secure data handling within the vault. - Created `backup-settings-repair.ts` to automatically repair backup settings for admin profiles if needed.
2026-06-20 21:00:41 +00:00 · 2026-03-15 04:17:09 +08:00
parent 1fcfeb91d1
commit f0ace28bf2
30 changed files with 2697 additions and 2519 deletions
@@ -0,0 +1,53 @@
+import type { AdminInvite, AdminUser, ListResponse } from '../types';
+import { parseJson, type AuthedFetch } from './shared';
+
+export async function listAdminUsers(authedFetch: AuthedFetch): Promise<AdminUser[]> {
+  const resp = await authedFetch('/api/admin/users');
+  if (!resp.ok) throw new Error('Failed to load users');
+  const body = await parseJson<ListResponse<AdminUser>>(resp);
+  return body?.data || [];
+}
+
+export async function listAdminInvites(authedFetch: AuthedFetch): Promise<AdminInvite[]> {
+  const resp = await authedFetch('/api/admin/invites?includeInactive=true');
+  if (!resp.ok) throw new Error('Failed to load invites');
+  const body = await parseJson<ListResponse<AdminInvite>>(resp);
+  return body?.data || [];
+}
+
+export async function createInvite(authedFetch: AuthedFetch, hours: number): Promise<void> {
+  const resp = await authedFetch('/api/admin/invites', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ expiresInHours: hours }),
+  });
+  if (!resp.ok) throw new Error('Create invite failed');
+}
+
+export async function revokeInvite(authedFetch: AuthedFetch, code: string): Promise<void> {
+  const resp = await authedFetch(`/api/admin/invites/${encodeURIComponent(code)}`, { method: 'DELETE' });
+  if (!resp.ok) throw new Error('Revoke invite failed');
+}
+
+export async function deleteAllInvites(authedFetch: AuthedFetch): Promise<void> {
+  const resp = await authedFetch('/api/admin/invites', { method: 'DELETE' });
+  if (!resp.ok) throw new Error('Delete all invites failed');
+}
+
+export async function setUserStatus(
+  authedFetch: AuthedFetch,
+  userId: string,
+  status: 'active' | 'banned'
+): Promise<void> {
+  const resp = await authedFetch(`/api/admin/users/${encodeURIComponent(userId)}/status`, {
+    method: 'PUT',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ status }),
+  });
+  if (!resp.ok) throw new Error('Update user status failed');
+}
+
+export async function deleteUser(authedFetch: AuthedFetch, userId: string): Promise<void> {
+  const resp = await authedFetch(`/api/admin/users/${encodeURIComponent(userId)}`, { method: 'DELETE' });
+  if (!resp.ok) throw new Error('Delete user failed');
+}
@@ -0,0 +1,449 @@
+import { bytesToBase64, decryptBw, encryptBw, hkdfExpand, pbkdf2 } from '../crypto';
+import { t } from '../i18n';
+import type { AuthorizedDevice } from '../types';
+import type {
+  Profile,
+  SessionState,
+  SetupStatusResponse,
+  TokenError,
+  TokenSuccess,
+  WebConfigResponse,
+} from '../types';
+import { parseJson, type AuthedFetch, type SessionSetter } from './shared';
+
+const SESSION_KEY = 'nodewarden.web.session.v4';
+const DEVICE_IDENTIFIER_KEY = 'nodewarden.web.device.identifier.v1';
+const TOTP_REMEMBER_TOKEN_KEY = 'nodewarden.web.totp.remember-token.v1';
+
+export interface PreloginResult {
+  hash: string;
+  masterKey: Uint8Array;
+  kdfIterations: number;
+}
+
+export interface PreloginKdfConfig {
+  kdfType: number;
+  kdfIterations: number;
+  kdfMemory: number | null;
+  kdfParallelism: number | null;
+}
+
+function randomHex(length: number): string {
+  const bytes = crypto.getRandomValues(new Uint8Array(Math.max(1, Math.ceil(length / 2))));
+  return Array.from(bytes).map((b) => b.toString(16).padStart(2, '0')).join('').slice(0, length);
+}
+
+function getOrCreateDeviceIdentifier(): string {
+  const current = (localStorage.getItem(DEVICE_IDENTIFIER_KEY) || '').trim();
+  if (current) return current;
+  const next = `${randomHex(8)}-${randomHex(4)}-${randomHex(4)}-${randomHex(4)}-${randomHex(12)}`;
+  localStorage.setItem(DEVICE_IDENTIFIER_KEY, next);
+  return next;
+}
+
+function guessDeviceName(): string {
+  const ua = (typeof navigator !== 'undefined' ? navigator.userAgent : '').toLowerCase();
+  const platform = (typeof navigator !== 'undefined' ? navigator.platform : '').trim();
+  const browser = ua.includes('edg/') ? 'Edge' : ua.includes('chrome/') ? 'Chrome' : ua.includes('firefox/') ? 'Firefox' : ua.includes('safari/') ? 'Safari' : 'Browser';
+  const os = ua.includes('windows') ? 'Windows' : ua.includes('mac os') ? 'macOS' : ua.includes('linux') ? 'Linux' : ua.includes('android') ? 'Android' : ua.includes('iphone') || ua.includes('ipad') ? 'iOS' : platform || 'Unknown OS';
+  return `${browser} on ${os}`.slice(0, 128);
+}
+
+function getRememberTwoFactorToken(): string | null {
+  const token = (localStorage.getItem(TOTP_REMEMBER_TOKEN_KEY) || '').trim();
+  return token || null;
+}
+
+function saveRememberTwoFactorToken(token: string | undefined): void {
+  const normalized = String(token || '').trim();
+  if (!normalized) return;
+  localStorage.setItem(TOTP_REMEMBER_TOKEN_KEY, normalized);
+}
+
+function clearRememberTwoFactorToken(): void {
+  localStorage.removeItem(TOTP_REMEMBER_TOKEN_KEY);
+}
+
+export function loadSession(): SessionState | null {
+  try {
+    const raw = localStorage.getItem(SESSION_KEY);
+    if (!raw) return null;
+    const parsed = JSON.parse(raw) as SessionState;
+    if (!parsed.accessToken || !parsed.refreshToken) return null;
+    return {
+      accessToken: parsed.accessToken,
+      refreshToken: parsed.refreshToken,
+      email: parsed.email,
+    };
+  } catch {
+    return null;
+  }
+}
+
+export function saveSession(session: SessionState | null): void {
+  if (!session) {
+    localStorage.removeItem(SESSION_KEY);
+    return;
+  }
+  const persisted: SessionState = {
+    accessToken: session.accessToken,
+    refreshToken: session.refreshToken,
+    email: session.email,
+  };
+  localStorage.setItem(SESSION_KEY, JSON.stringify(persisted));
+}
+
+export async function getSetupStatus(): Promise<SetupStatusResponse> {
+  const resp = await fetch('/setup/status');
+  const body = await parseJson<SetupStatusResponse>(resp);
+  return { registered: !!body?.registered };
+}
+
+export async function getWebConfig(): Promise<WebConfigResponse> {
+  const resp = await fetch('/api/web/config');
+  return (await parseJson<WebConfigResponse>(resp)) || {};
+}
+
+export function getCurrentDeviceIdentifier(): string {
+  return (localStorage.getItem(DEVICE_IDENTIFIER_KEY) || '').trim();
+}
+
+export async function deriveLoginHash(email: string, password: string, fallbackIterations: number): Promise<PreloginResult> {
+  const pre = await fetch('/identity/accounts/prelogin', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ email: email.toLowerCase() }),
+  });
+  if (!pre.ok) throw new Error('prelogin failed');
+  const data = (await parseJson<{ kdfIterations?: number }>(pre)) || {};
+  const iterations = Number(data.kdfIterations || fallbackIterations);
+  const masterKey = await pbkdf2(password, email.toLowerCase(), iterations, 32);
+  const hash = await pbkdf2(masterKey, password, 1, 32);
+  return { hash: bytesToBase64(hash), masterKey, kdfIterations: iterations };
+}
+
+export async function getPreloginKdfConfig(email: string, fallbackIterations: number): Promise<PreloginKdfConfig> {
+  const normalized = String(email || '').trim().toLowerCase();
+  if (!normalized) throw new Error('Email is required');
+  const pre = await fetch('/identity/accounts/prelogin', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ email: normalized }),
+  });
+  if (!pre.ok) throw new Error('prelogin failed');
+  const data = (await parseJson<{ kdf?: number; kdfIterations?: number; kdfMemory?: number | null; kdfParallelism?: number | null }>(pre)) || {};
+  return {
+    kdfType: Number(data.kdf ?? 0) || 0,
+    kdfIterations: Number(data.kdfIterations || fallbackIterations),
+    kdfMemory: data.kdfMemory == null ? null : Number(data.kdfMemory),
+    kdfParallelism: data.kdfParallelism == null ? null : Number(data.kdfParallelism),
+  };
+}
+
+export async function loginWithPassword(
+  email: string,
+  passwordHash: string,
+  options?: {
+    totpCode?: string;
+    rememberDevice?: boolean;
+    useRememberToken?: boolean;
+  }
+): Promise<TokenSuccess | TokenError> {
+  const body = new URLSearchParams();
+  body.set('grant_type', 'password');
+  body.set('username', email.toLowerCase());
+  body.set('password', passwordHash);
+  body.set('scope', 'api offline_access');
+  body.set('deviceIdentifier', getOrCreateDeviceIdentifier());
+  body.set('deviceName', guessDeviceName());
+  body.set('deviceType', '14');
+
+  const rememberedToken = options?.useRememberToken ? getRememberTwoFactorToken() : null;
+  if (rememberedToken) {
+    body.set('twoFactorProvider', '5');
+    body.set('twoFactorToken', rememberedToken);
+  } else if (options?.totpCode) {
+    body.set('twoFactorProvider', '0');
+    body.set('twoFactorToken', options.totpCode);
+    if (options.rememberDevice) {
+      body.set('twoFactorRemember', '1');
+    }
+  }
+  const resp = await fetch('/identity/connect/token', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+    body: body.toString(),
+  });
+  const json = (await parseJson<TokenSuccess & TokenError>(resp)) || {};
+  if (resp.ok) {
+    saveRememberTwoFactorToken((json as TokenSuccess).TwoFactorToken);
+  } else if (rememberedToken) {
+    clearRememberTwoFactorToken();
+  }
+  if (!resp.ok) return json;
+  return json;
+}
+
+export async function refreshAccessToken(refreshToken: string): Promise<TokenSuccess | null> {
+  const body = new URLSearchParams();
+  body.set('grant_type', 'refresh_token');
+  body.set('refresh_token', refreshToken);
+  const resp = await fetch('/identity/connect/token', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
+    body: body.toString(),
+  });
+  if (!resp.ok) return null;
+  const json = await parseJson<TokenSuccess>(resp);
+  return json || null;
+}
+
+export async function registerAccount(args: {
+  email: string;
+  name: string;
+  password: string;
+  inviteCode?: string;
+  fallbackIterations: number;
+}): Promise<{ ok: true } | { ok: false; message: string }> {
+  try {
+    const { email, name, password, inviteCode, fallbackIterations } = args;
+    const masterKey = await pbkdf2(password, email, fallbackIterations, 32);
+    const masterHash = await pbkdf2(masterKey, password, 1, 32);
+    const encKey = await hkdfExpand(masterKey, 'enc', 32);
+    const macKey = await hkdfExpand(masterKey, 'mac', 32);
+    const sym = crypto.getRandomValues(new Uint8Array(64));
+    const encryptedVaultKey = await encryptBw(sym, encKey, macKey);
+
+    const keyPair = await crypto.subtle.generateKey(
+      {
+        name: 'RSA-OAEP',
+        modulusLength: 2048,
+        publicExponent: new Uint8Array([1, 0, 1]),
+        hash: 'SHA-1',
+      },
+      true,
+      ['encrypt', 'decrypt']
+    );
+    const publicKey = new Uint8Array(await crypto.subtle.exportKey('spki', keyPair.publicKey));
+    const privateKey = new Uint8Array(await crypto.subtle.exportKey('pkcs8', keyPair.privateKey));
+    const encryptedPrivateKey = await encryptBw(privateKey, sym.slice(0, 32), sym.slice(32, 64));
+
+    const resp = await fetch('/api/accounts/register', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({
+        email: email.toLowerCase(),
+        name,
+        masterPasswordHash: bytesToBase64(masterHash),
+        key: encryptedVaultKey,
+        kdf: 0,
+        kdfIterations: fallbackIterations,
+        inviteCode: inviteCode || undefined,
+        keys: {
+          publicKey: bytesToBase64(publicKey),
+          encryptedPrivateKey,
+        },
+      }),
+    });
+
+    if (!resp.ok) {
+      const json = await parseJson<TokenError>(resp);
+      return { ok: false, message: json?.error_description || json?.error || 'Register failed' };
+    }
+    return { ok: true };
+  } catch (error) {
+    return { ok: false, message: error instanceof Error ? error.message : 'Register failed' };
+  }
+}
+
+export function createAuthedFetch(getSession: () => SessionState | null, setSession: SessionSetter) {
+  return async function authedFetch(input: string, init: RequestInit = {}): Promise<Response> {
+    const session = getSession();
+    if (!session?.accessToken) throw new Error('Unauthorized');
+    const headers = new Headers(init.headers || {});
+    headers.set('Authorization', `Bearer ${session.accessToken}`);
+
+    let resp = await fetch(input, { ...init, headers });
+    if (resp.status !== 401 || !session.refreshToken) return resp;
+
+    const refreshed = await refreshAccessToken(session.refreshToken);
+    if (!refreshed?.access_token) {
+      setSession(null);
+      throw new Error('Session expired');
+    }
+
+    const nextSession: SessionState = {
+      ...session,
+      accessToken: refreshed.access_token,
+      refreshToken: refreshed.refresh_token || session.refreshToken,
+    };
+    setSession(nextSession);
+    saveSession(nextSession);
+
+    const retryHeaders = new Headers(init.headers || {});
+    retryHeaders.set('Authorization', `Bearer ${nextSession.accessToken}`);
+    resp = await fetch(input, { ...init, headers: retryHeaders });
+    return resp;
+  };
+}
+
+export async function getProfile(authedFetch: AuthedFetch): Promise<Profile> {
+  const resp = await authedFetch('/api/accounts/profile');
+  if (!resp.ok) throw new Error('Failed to load profile');
+  const body = await parseJson<Profile>(resp);
+  if (!body) throw new Error('Invalid profile');
+  return body;
+}
+
+export async function unlockVaultKey(profileKey: string, masterKey: Uint8Array): Promise<{ symEncKey: string; symMacKey: string }> {
+  const encKey = await hkdfExpand(masterKey, 'enc', 32);
+  const macKey = await hkdfExpand(masterKey, 'mac', 32);
+  const keyBytes = await decryptBw(profileKey, encKey, macKey);
+  if (!keyBytes || keyBytes.length < 64) throw new Error('Invalid profile key');
+  return {
+    symEncKey: bytesToBase64(keyBytes.slice(0, 32)),
+    symMacKey: bytesToBase64(keyBytes.slice(32, 64)),
+  };
+}
+
+export async function changeMasterPassword(
+  authedFetch: AuthedFetch,
+  args: {
+    email: string;
+    currentPassword: string;
+    newPassword: string;
+    currentIterations: number;
+    profileKey: string;
+  }
+): Promise<void> {
+  const current = await deriveLoginHash(args.email, args.currentPassword, args.currentIterations);
+  const oldEnc = await hkdfExpand(current.masterKey, 'enc', 32);
+  const oldMac = await hkdfExpand(current.masterKey, 'mac', 32);
+  const userSym = await decryptBw(args.profileKey, oldEnc, oldMac);
+  const nextMasterKey = await pbkdf2(args.newPassword, args.email, current.kdfIterations, 32);
+  const nextHash = await pbkdf2(nextMasterKey, args.newPassword, 1, 32);
+  const nextEnc = await hkdfExpand(nextMasterKey, 'enc', 32);
+  const nextMac = await hkdfExpand(nextMasterKey, 'mac', 32);
+  const newKey = await encryptBw(userSym.slice(0, 64), nextEnc, nextMac);
+
+  const resp = await authedFetch('/api/accounts/password', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({
+      currentPasswordHash: current.hash,
+      newMasterPasswordHash: bytesToBase64(nextHash),
+      newKey,
+      kdf: 0,
+      kdfIterations: current.kdfIterations,
+    }),
+  });
+  if (!resp.ok) throw new Error('Change master password failed');
+}
+
+export async function setTotp(
+  authedFetch: AuthedFetch,
+  payload: { enabled: boolean; token?: string; secret?: string; masterPasswordHash?: string }
+): Promise<void> {
+  const resp = await authedFetch('/api/accounts/totp', {
+    method: 'PUT',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(payload),
+  });
+  if (!resp.ok) {
+    const body = await parseJson<TokenError>(resp);
+    throw new Error(body?.error_description || body?.error || 'TOTP update failed');
+  }
+}
+
+export async function verifyMasterPassword(
+  authedFetch: AuthedFetch,
+  masterPasswordHash: string
+): Promise<void> {
+  const resp = await authedFetch('/api/accounts/verify-password', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ masterPasswordHash }),
+  });
+  if (!resp.ok) {
+    const body = await parseJson<TokenError>(resp);
+    throw new Error(body?.error_description || body?.error || 'Master password verify failed');
+  }
+}
+
+export async function getTotpStatus(authedFetch: AuthedFetch): Promise<{ enabled: boolean }> {
+  const resp = await authedFetch('/api/accounts/totp');
+  if (!resp.ok) throw new Error('Failed to load TOTP status');
+  const body = (await parseJson<{ enabled?: boolean }>(resp)) || {};
+  return { enabled: !!body.enabled };
+}
+
+export async function getTotpRecoveryCode(
+  authedFetch: AuthedFetch,
+  masterPasswordHash: string
+): Promise<string> {
+  const resp = await authedFetch('/api/accounts/totp/recovery-code', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ masterPasswordHash }),
+  });
+  if (!resp.ok) {
+    const body = await parseJson<TokenError>(resp);
+    throw new Error(body?.error_description || body?.error || 'Failed to get recovery code');
+  }
+  const body = (await parseJson<{ code?: string }>(resp)) || {};
+  return String(body.code || '');
+}
+
+export async function recoverTwoFactor(
+  email: string,
+  masterPasswordHash: string,
+  recoveryCode: string
+): Promise<{ newRecoveryCode?: string }> {
+  const resp = await fetch('/identity/accounts/recover-2fa', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({
+      email: email.toLowerCase().trim(),
+      masterPasswordHash,
+      recoveryCode,
+    }),
+  });
+  if (!resp.ok) {
+    const body = await parseJson<TokenError>(resp);
+    throw new Error(body?.error_description || body?.error || 'Recover 2FA failed');
+  }
+  return (await parseJson<{ newRecoveryCode?: string }>(resp)) || {};
+}
+
+export async function getAuthorizedDevices(authedFetch: AuthedFetch): Promise<AuthorizedDevice[]> {
+  const resp = await authedFetch('/api/devices/authorized');
+  if (!resp.ok) throw new Error(t('txt_load_devices_failed'));
+  const body = await parseJson<{ object: 'list'; data: AuthorizedDevice[] }>(resp);
+  return body?.data || [];
+}
+
+export async function revokeAuthorizedDeviceTrust(
+  authedFetch: AuthedFetch,
+  deviceIdentifier: string
+): Promise<void> {
+  const resp = await authedFetch(`/api/devices/authorized/${encodeURIComponent(deviceIdentifier)}`, { method: 'DELETE' });
+  if (!resp.ok) throw new Error(t('txt_revoke_device_trust_failed'));
+}
+
+export async function revokeAllAuthorizedDeviceTrust(authedFetch: AuthedFetch): Promise<void> {
+  const resp = await authedFetch('/api/devices/authorized', { method: 'DELETE' });
+  if (!resp.ok) throw new Error(t('txt_revoke_all_device_trust_failed'));
+}
+
+export async function deleteAuthorizedDevice(
+  authedFetch: AuthedFetch,
+  deviceIdentifier: string
+): Promise<void> {
+  const resp = await authedFetch(`/api/devices/${encodeURIComponent(deviceIdentifier)}`, { method: 'DELETE' });
+  if (!resp.ok) throw new Error(t('txt_remove_device_failed'));
+}
+
+export async function deleteAllAuthorizedDevices(authedFetch: AuthedFetch): Promise<void> {
+  const resp = await authedFetch('/api/devices', { method: 'DELETE' });
+  if (!resp.ok) throw new Error(t('txt_remove_all_devices_failed'));
+}
@@ -0,0 +1,255 @@
+import { t } from '../i18n';
+import type {
+  BackupDestinationConfig,
+  BackupDestinationRecord,
+  BackupDestinationType,
+  BackupRuntimeState,
+  BackupScheduleConfig,
+  BackupSettings as AdminBackupSettings,
+  E3BackupDestination,
+  WebDavBackupDestination,
+} from '@shared/backup-schema';
+import {
+  parseContentDispositionFileName,
+  parseErrorMessage,
+  parseJson,
+  type AuthedFetch,
+} from './shared';
+
+export type {
+  BackupDestinationConfig,
+  BackupDestinationRecord,
+  BackupDestinationType,
+  BackupRuntimeState,
+  BackupScheduleConfig,
+  AdminBackupSettings,
+  E3BackupDestination,
+  WebDavBackupDestination,
+};
+
+export interface BackupSettingsPortableWrap {
+  userId: string;
+  wrappedKey: string;
+}
+
+export interface BackupSettingsPortablePayload {
+  iv: string;
+  ciphertext: string;
+  wraps: BackupSettingsPortableWrap[];
+}
+
+export interface BackupSettingsRepairStateResponse {
+  object: 'backup-settings-repair';
+  needsRepair: boolean;
+  portable: BackupSettingsPortablePayload | null;
+}
+
+export interface AdminBackupRunResponse {
+  object: 'backup-run';
+  result: {
+    fileName: string;
+    fileSize: number;
+    provider: string;
+    remotePath: string;
+  };
+  settings: AdminBackupSettings;
+}
+
+export interface RemoteBackupItem {
+  path: string;
+  name: string;
+  isDirectory: boolean;
+  size: number | null;
+  modifiedAt: string | null;
+}
+
+export interface RemoteBackupBrowserResponse {
+  object: 'backup-remote-browser';
+  destinationId: string;
+  destinationName: string;
+  provider: BackupDestinationType;
+  currentPath: string;
+  parentPath: string | null;
+  items: RemoteBackupItem[];
+}
+
+export interface AdminBackupImportCounts {
+  config: number;
+  users: number;
+  userRevisions: number;
+  folders: number;
+  ciphers: number;
+  attachments: number;
+  sends: number;
+  attachmentFiles: number;
+  sendFiles: number;
+}
+
+export interface AdminBackupImportResponse {
+  object: 'instance-backup-import';
+  imported: AdminBackupImportCounts;
+}
+
+export interface AdminBackupExportPayload {
+  fileName: string;
+  mimeType: string;
+  bytes: Uint8Array;
+}
+
+export async function exportAdminBackup(authedFetch: AuthedFetch): Promise<AdminBackupExportPayload> {
+  const resp = await authedFetch('/api/admin/backup/export', { method: 'POST' });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, t('txt_backup_export_failed')));
+
+  const mimeType = String(resp.headers.get('Content-Type') || 'application/zip').trim() || 'application/zip';
+  const fileName = parseContentDispositionFileName(resp, 'nodewarden_backup.zip');
+  const bytes = new Uint8Array(await resp.arrayBuffer());
+  return { fileName, mimeType, bytes };
+}
+
+export async function getAdminBackupSettings(authedFetch: AuthedFetch): Promise<AdminBackupSettings> {
+  const resp = await authedFetch('/api/admin/backup/settings', { method: 'GET' });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, t('txt_backup_settings_load_failed')));
+  const body = await parseJson<AdminBackupSettings>(resp);
+  if (!Array.isArray(body?.destinations)) throw new Error(t('txt_backup_settings_invalid_response'));
+  return body;
+}
+
+export async function saveAdminBackupSettings(
+  authedFetch: AuthedFetch,
+  settings: AdminBackupSettings
+): Promise<AdminBackupSettings> {
+  const resp = await authedFetch('/api/admin/backup/settings', {
+    method: 'PUT',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(settings),
+  });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, t('txt_backup_settings_save_failed')));
+  const body = await parseJson<AdminBackupSettings>(resp);
+  if (!Array.isArray(body?.destinations)) throw new Error(t('txt_backup_settings_invalid_response'));
+  return body;
+}
+
+export async function getAdminBackupSettingsRepairState(
+  authedFetch: AuthedFetch
+): Promise<BackupSettingsRepairStateResponse> {
+  const resp = await authedFetch('/api/admin/backup/settings/repair', { method: 'GET' });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, t('txt_backup_settings_load_failed')));
+  const body = await parseJson<BackupSettingsRepairStateResponse>(resp);
+  if (!body || typeof body.needsRepair !== 'boolean') {
+    throw new Error(t('txt_backup_settings_invalid_response'));
+  }
+  return body;
+}
+
+export async function repairAdminBackupSettings(
+  authedFetch: AuthedFetch,
+  settings: AdminBackupSettings
+): Promise<AdminBackupSettings> {
+  const resp = await authedFetch('/api/admin/backup/settings/repair', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(settings),
+  });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, t('txt_backup_settings_save_failed')));
+  const body = await parseJson<AdminBackupSettings>(resp);
+  if (!Array.isArray(body?.destinations)) throw new Error(t('txt_backup_settings_invalid_response'));
+  return body;
+}
+
+export async function runAdminBackupNow(
+  authedFetch: AuthedFetch,
+  destinationId?: string | null
+): Promise<AdminBackupRunResponse> {
+  const resp = await authedFetch('/api/admin/backup/run', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(destinationId ? { destinationId } : {}),
+  });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, t('txt_backup_remote_run_failed')));
+  const body = await parseJson<AdminBackupRunResponse>(resp);
+  if (!body?.result || !body?.settings) throw new Error(t('txt_backup_remote_run_invalid_response'));
+  return body;
+}
+
+export async function listRemoteBackups(
+  authedFetch: AuthedFetch,
+  destinationId: string,
+  path: string = ''
+): Promise<RemoteBackupBrowserResponse> {
+  const params = new URLSearchParams();
+  params.set('destinationId', destinationId);
+  if (path) params.set('path', path);
+  const query = `?${params.toString()}`;
+  const resp = await authedFetch(`/api/admin/backup/remote${query}`, { method: 'GET' });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, t('txt_backup_remote_load_failed')));
+  const body = await parseJson<RemoteBackupBrowserResponse>(resp);
+  if (!body?.items || typeof body.currentPath !== 'string' || !body.destinationId) throw new Error(t('txt_backup_remote_invalid_response'));
+  return body;
+}
+
+export async function downloadRemoteBackup(
+  authedFetch: AuthedFetch,
+  destinationId: string,
+  path: string
+): Promise<AdminBackupExportPayload> {
+  const params = new URLSearchParams();
+  params.set('destinationId', destinationId);
+  params.set('path', path);
+  const resp = await authedFetch(`/api/admin/backup/remote/download?${params.toString()}`, { method: 'GET' });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, t('txt_backup_remote_download_failed')));
+  const mimeType = String(resp.headers.get('Content-Type') || 'application/zip').trim() || 'application/zip';
+  const fileName = parseContentDispositionFileName(resp, 'nodewarden_remote_backup.zip');
+  const bytes = new Uint8Array(await resp.arrayBuffer());
+  return { fileName, mimeType, bytes };
+}
+
+export async function deleteRemoteBackup(
+  authedFetch: AuthedFetch,
+  destinationId: string,
+  path: string
+): Promise<void> {
+  const params = new URLSearchParams();
+  params.set('destinationId', destinationId);
+  params.set('path', path);
+  const resp = await authedFetch(`/api/admin/backup/remote/file?${params.toString()}`, { method: 'DELETE' });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, t('txt_backup_remote_delete_failed')));
+}
+
+export async function restoreRemoteBackup(
+  authedFetch: AuthedFetch,
+  destinationId: string,
+  path: string,
+  replaceExisting: boolean = false
+): Promise<AdminBackupImportResponse> {
+  const resp = await authedFetch('/api/admin/backup/remote/restore', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ destinationId, path, replaceExisting }),
+  });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, t('txt_backup_remote_restore_failed')));
+  const body = await parseJson<AdminBackupImportResponse>(resp);
+  if (!body?.imported) throw new Error(t('txt_backup_remote_restore_invalid_response'));
+  return body;
+}
+
+export async function importAdminBackup(
+  authedFetch: AuthedFetch,
+  file: File,
+  replaceExisting: boolean = false
+): Promise<AdminBackupImportResponse> {
+  const formData = new FormData();
+  formData.set('file', file, file.name || 'nodewarden_backup.zip');
+  if (replaceExisting) {
+    formData.set('replaceExisting', '1');
+  }
+
+  const resp = await authedFetch('/api/admin/backup/import', {
+    method: 'POST',
+    body: formData,
+  });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, t('txt_backup_import_failed')));
+
+  const body = await parseJson<AdminBackupImportResponse>(resp);
+  if (!body?.imported) throw new Error(t('txt_backup_import_invalid_response'));
+  return body;
+}
@@ -0,0 +1,322 @@
+import { base64ToBytes, bytesToBase64, decryptBw, decryptBwFileData, decryptStr, encryptBw, encryptBwFileData, hkdf, pbkdf2 } from '../crypto';
+import type { Send, SendDraft, SessionState } from '../types';
+import { chunkArray, createApiError, parseErrorMessage, parseJson, type AuthedFetch } from './shared';
+
+function toIsoDateFromDays(value: string, required: boolean): string | null {
+  const raw = String(value || '').trim();
+  if (!raw) {
+    if (required) throw new Error('Deletion days is required');
+    return null;
+  }
+  const n = Number(raw);
+  if (!Number.isFinite(n) || n < 0) {
+    if (required) throw new Error('Invalid deletion days');
+    throw new Error('Invalid expiration days');
+  }
+  if (!required && n === 0) return null;
+  const date = new Date(Date.now() + Math.floor(n) * 24 * 60 * 60 * 1000);
+  return date.toISOString();
+}
+
+function bytesToBase64Url(bytes: Uint8Array): string {
+  return bytesToBase64(bytes).replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/g, '');
+}
+
+function base64UrlToBytes(value: string): Uint8Array {
+  const raw = value.replace(/-/g, '+').replace(/_/g, '/');
+  const padded = raw + '='.repeat((4 - (raw.length % 4)) % 4);
+  return base64ToBytes(padded);
+}
+
+const SEND_KEY_SALT = 'bitwarden-send';
+const SEND_KEY_PURPOSE = 'send';
+const SEND_KEY_SEED_BYTES = 16;
+const SEND_PASSWORD_ITERATIONS = 100000;
+
+async function encryptTextValue(value: string, enc: Uint8Array, mac: Uint8Array): Promise<string | null> {
+  const s = String(value || '');
+  if (!s.trim()) return null;
+  return encryptBw(new TextEncoder().encode(s), enc, mac);
+}
+
+async function toSendKeyParts(sendKeyMaterial: Uint8Array): Promise<{ enc: Uint8Array; mac: Uint8Array }> {
+  if (sendKeyMaterial.length >= 64) {
+    return { enc: sendKeyMaterial.slice(0, 32), mac: sendKeyMaterial.slice(32, 64) };
+  }
+  const derived = await hkdf(sendKeyMaterial, SEND_KEY_SALT, SEND_KEY_PURPOSE, 64);
+  return { enc: derived.slice(0, 32), mac: derived.slice(32, 64) };
+}
+
+async function hashSendPasswordB64(password: string, sendKeyMaterial: Uint8Array): Promise<string> {
+  const hash = await pbkdf2(password, sendKeyMaterial, SEND_PASSWORD_ITERATIONS, 32);
+  return bytesToBase64(hash);
+}
+
+function parseMaxAccessCountRaw(value: string): number | null {
+  const raw = String(value || '').trim();
+  if (!raw) return null;
+  const n = Number(raw);
+  if (!Number.isFinite(n) || n < 0) throw new Error('Invalid max access count');
+  return Math.floor(n);
+}
+
+export async function getSends(authedFetch: AuthedFetch): Promise<Send[]> {
+  const resp = await authedFetch('/api/sends');
+  if (!resp.ok) throw new Error('Failed to load sends');
+  const body = await parseJson<{ object: 'list'; data: Send[] }>(resp);
+  return body?.data || [];
+}
+
+export async function createSend(
+  authedFetch: AuthedFetch,
+  session: SessionState,
+  draft: SendDraft
+): Promise<Send> {
+  if (!session.symEncKey || !session.symMacKey) throw new Error('Vault key unavailable');
+  const userEnc = base64ToBytes(session.symEncKey);
+  const userMac = base64ToBytes(session.symMacKey);
+  const sendKeyMaterial = crypto.getRandomValues(new Uint8Array(SEND_KEY_SEED_BYTES));
+  const sendKeyForUser = await encryptBw(sendKeyMaterial, userEnc, userMac);
+  const sendKey = await toSendKeyParts(sendKeyMaterial);
+  const nameCipher = await encryptTextValue(draft.name || '', sendKey.enc, sendKey.mac);
+  const notesCipher = await encryptTextValue(draft.notes || '', sendKey.enc, sendKey.mac);
+
+  const deletionIso = toIsoDateFromDays(draft.deletionDays, true)!;
+  const expirationIso = toIsoDateFromDays(draft.expirationDays, false);
+  const maxAccessCount = parseMaxAccessCountRaw(draft.maxAccessCount);
+  const password = String(draft.password || '');
+  const passwordHash = password ? await hashSendPasswordB64(password, sendKeyMaterial) : null;
+
+  if (draft.type === 'text') {
+    const text = String(draft.text || '').trim();
+    if (!text) throw new Error('Send text is required');
+    const textCipher = await encryptTextValue(text, sendKey.enc, sendKey.mac);
+
+    const payload = {
+      type: 0,
+      name: nameCipher,
+      notes: notesCipher,
+      key: sendKeyForUser,
+      text: {
+        text: textCipher,
+        hidden: false,
+      },
+      maxAccessCount,
+      password: passwordHash,
+      hideEmail: false,
+      disabled: !!draft.disabled,
+      deletionDate: deletionIso,
+      expirationDate: expirationIso,
+    };
+
+    const resp = await authedFetch('/api/sends', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(payload),
+    });
+    if (!resp.ok) throw new Error(await parseErrorMessage(resp, 'Create send failed'));
+    const body = await parseJson<Send>(resp);
+    if (!body?.id) throw new Error('Create send failed');
+    return body;
+  }
+
+  if (!draft.file) throw new Error('File is required');
+  const fileNameCipher = await encryptTextValue(draft.file.name, sendKey.enc, sendKey.mac);
+  if (!fileNameCipher) throw new Error('Invalid file name');
+  const plainFileBytes = new Uint8Array(await draft.file.arrayBuffer());
+  const encryptedFileBytes = await encryptBwFileData(plainFileBytes, sendKey.enc, sendKey.mac);
+
+  const fileResp = await authedFetch('/api/sends/file/v2', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({
+      type: 1,
+      name: nameCipher,
+      notes: notesCipher,
+      key: sendKeyForUser,
+      file: {
+        fileName: fileNameCipher,
+      },
+      fileLength: encryptedFileBytes.byteLength,
+      maxAccessCount,
+      password: passwordHash,
+      hideEmail: false,
+      disabled: !!draft.disabled,
+      deletionDate: deletionIso,
+      expirationDate: expirationIso,
+    }),
+  });
+  if (!fileResp.ok) throw new Error(await parseErrorMessage(fileResp, 'Create file send failed'));
+
+  const uploadInfo = await parseJson<{ url?: string; sendResponse?: Send }>(fileResp);
+  const uploadUrl = uploadInfo?.url;
+  if (!uploadUrl) throw new Error('Create file send failed: missing upload URL');
+
+  const formData = new FormData();
+  const encryptedBlob = new Blob([encryptedFileBytes as unknown as BlobPart], { type: 'application/octet-stream' });
+  formData.set('data', encryptedBlob, fileNameCipher);
+  const uploadResp = await authedFetch(uploadUrl, {
+    method: 'POST',
+    body: formData,
+  });
+  if (!uploadResp.ok) throw new Error(await parseErrorMessage(uploadResp, 'Upload send file failed'));
+  if (!uploadInfo?.sendResponse?.id) throw new Error('Create file send failed');
+  return uploadInfo.sendResponse;
+}
+
+export async function updateSend(
+  authedFetch: AuthedFetch,
+  session: SessionState,
+  send: Send,
+  draft: SendDraft
+): Promise<Send> {
+  if (!session.symEncKey || !session.symMacKey) throw new Error('Vault key unavailable');
+  if (!send.key) throw new Error('Send key unavailable');
+  const userEnc = base64ToBytes(session.symEncKey);
+  const userMac = base64ToBytes(session.symMacKey);
+  const sendKeyMaterial = await decryptBw(send.key, userEnc, userMac);
+  const sendKey = await toSendKeyParts(sendKeyMaterial);
+  const nameCipher = await encryptTextValue(draft.name || '', sendKey.enc, sendKey.mac);
+  const notesCipher = await encryptTextValue(draft.notes || '', sendKey.enc, sendKey.mac);
+
+  const deletionIso = toIsoDateFromDays(draft.deletionDays, true)!;
+  const expirationIso = toIsoDateFromDays(draft.expirationDays, false);
+  const maxAccessCount = parseMaxAccessCountRaw(draft.maxAccessCount);
+
+  if (draft.type === 'file' && draft.file) {
+    throw new Error('Updating file content is not supported yet');
+  }
+
+  const textCipher = await encryptTextValue(String(draft.text || ''), sendKey.enc, sendKey.mac);
+
+  const passwordRaw = String(draft.password || '');
+  const passwordHash = passwordRaw ? await hashSendPasswordB64(passwordRaw, sendKeyMaterial) : null;
+
+  const payload = {
+    id: send.id,
+    type: draft.type === 'file' ? 1 : 0,
+    name: nameCipher,
+    notes: notesCipher,
+    key: send.key,
+    text: {
+      text: textCipher,
+      hidden: false,
+    },
+    maxAccessCount,
+    password: passwordHash,
+    hideEmail: false,
+    disabled: !!draft.disabled,
+    deletionDate: deletionIso,
+    expirationDate: expirationIso,
+  };
+
+  const resp = await authedFetch(`/api/sends/${encodeURIComponent(send.id)}`, {
+    method: 'PUT',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(payload),
+  });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, 'Update send failed'));
+  const body = await parseJson<Send>(resp);
+  if (!body?.id) throw new Error('Update send failed');
+  return body;
+}
+
+export async function deleteSend(authedFetch: AuthedFetch, sendId: string): Promise<void> {
+  const resp = await authedFetch(`/api/sends/${encodeURIComponent(sendId)}`, { method: 'DELETE' });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, 'Delete send failed'));
+}
+
+export async function bulkDeleteSends(authedFetch: AuthedFetch, ids: string[]): Promise<void> {
+  const uniqueIds = Array.from(new Set(ids.map((id) => String(id || '').trim()).filter(Boolean)));
+  for (const chunk of chunkArray(uniqueIds, 200)) {
+    const resp = await authedFetch('/api/sends/delete', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ ids: chunk }),
+    });
+    if (!resp.ok) throw new Error('Bulk delete sends failed');
+  }
+}
+
+async function buildPublicSendAccessPayload(password?: string, keyPart?: string | null): Promise<Record<string, unknown>> {
+  const payload: Record<string, unknown> = {};
+  const plainPassword = String(password || '').trim();
+  if (!plainPassword) return payload;
+
+  if (keyPart) {
+    try {
+      const sendKeyMaterial = base64UrlToBytes(keyPart);
+      const passwordHashB64 = await hashSendPasswordB64(plainPassword, sendKeyMaterial);
+      payload.passwordHash = passwordHashB64;
+      payload.password_hash_b64 = passwordHashB64;
+      payload.passwordHashB64 = passwordHashB64;
+    } catch {
+      // Key material invalid; server will reject as unauthorized.
+    }
+  }
+  return payload;
+}
+
+export async function accessPublicSend(accessId: string, keyPart?: string | null, password?: string): Promise<any> {
+  const payload = await buildPublicSendAccessPayload(password, keyPart);
+  const resp = await fetch(`/api/sends/access/${encodeURIComponent(accessId)}`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(payload),
+  });
+  if (!resp.ok) {
+    const message = await parseErrorMessage(resp, 'Failed to access send');
+    throw createApiError(message, resp.status);
+  }
+  return (await parseJson<any>(resp)) || null;
+}
+
+export async function accessPublicSendFile(sendId: string, fileId: string, keyPart?: string | null, password?: string): Promise<string> {
+  const payload = await buildPublicSendAccessPayload(password, keyPart);
+  const resp = await fetch(`/api/sends/${encodeURIComponent(sendId)}/access/file/${encodeURIComponent(fileId)}`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(payload),
+  });
+  if (!resp.ok) {
+    const message = await parseErrorMessage(resp, 'Failed to access send file');
+    throw createApiError(message, resp.status);
+  }
+  const body = await parseJson<{ url?: string }>(resp);
+  if (!body?.url) throw new Error('Missing file URL');
+  return body.url;
+}
+
+export async function decryptPublicSend(accessData: any, urlSafeKey: string): Promise<any> {
+  const sendKeyMaterial = base64UrlToBytes(urlSafeKey);
+  const sendKey = await toSendKeyParts(sendKeyMaterial);
+  const out: any = { ...accessData };
+  out.decName = await decryptStr(accessData?.name || '', sendKey.enc, sendKey.mac);
+  if (accessData?.text?.text) {
+    out.decText = await decryptStr(accessData.text.text, sendKey.enc, sendKey.mac);
+  }
+  if (accessData?.file?.fileName) {
+    try {
+      out.decFileName = await decryptStr(accessData.file.fileName, sendKey.enc, sendKey.mac);
+    } catch {
+      out.decFileName = String(accessData.file.fileName);
+    }
+  }
+  return out;
+}
+
+export async function decryptPublicSendFileBytes(
+  encryptedBytes: ArrayBuffer | Uint8Array,
+  urlSafeKey: string
+): Promise<Uint8Array> {
+  const sendKeyMaterial = base64UrlToBytes(urlSafeKey);
+  const sendKey = await toSendKeyParts(sendKeyMaterial);
+  const encrypted = encryptedBytes instanceof Uint8Array ? encryptedBytes : new Uint8Array(encryptedBytes);
+  return decryptBwFileData(encrypted, sendKey.enc, sendKey.mac);
+}
+
+export function buildSendShareKey(sendKeyEncrypted: string, userEncB64: string, userMacB64: string): Promise<string> {
+  const userEnc = base64ToBytes(userEncB64);
+  const userMac = base64ToBytes(userMacB64);
+  return decryptBw(sendKeyEncrypted, userEnc, userMac).then((keyMaterial) => bytesToBase64Url(keyMaterial));
+}
@@ -0,0 +1,60 @@
+import { t } from '../i18n';
+import type { SessionState, TokenError } from '../types';
+
+export type AuthedFetch = (input: string, init?: RequestInit) => Promise<Response>;
+export type SessionSetter = (next: SessionState | null) => void;
+
+export const BULK_API_CHUNK_SIZE = 200;
+
+export function chunkArray<T>(items: T[], size: number): T[][] {
+  if (items.length <= size) return [items];
+  const chunks: T[][] = [];
+  for (let i = 0; i < items.length; i += size) {
+    chunks.push(items.slice(i, i + size));
+  }
+  return chunks;
+}
+
+export async function parseJson<T>(response: Response): Promise<T | null> {
+  const text = await response.text();
+  if (!text) return null;
+  try {
+    return JSON.parse(text) as T;
+  } catch {
+    return null;
+  }
+}
+
+export function parseContentDispositionFileName(response: Response, fallback: string): string {
+  const header = String(response.headers.get('Content-Disposition') || '').trim();
+  if (!header) return fallback;
+
+  const utf8Match = header.match(/filename\*\s*=\s*UTF-8''([^;]+)/i);
+  if (utf8Match?.[1]) {
+    try {
+      return decodeURIComponent(utf8Match[1]);
+    } catch {
+      // Ignore malformed filename*= values and fall back to the plain filename.
+    }
+  }
+
+  const plainMatch = header.match(/filename\s*=\s*"([^"]+)"|filename\s*=\s*([^;]+)/i);
+  const raw = plainMatch?.[1] || plainMatch?.[2] || '';
+  const normalized = String(raw).trim().replace(/^"+|"+$/g, '');
+  return normalized || fallback;
+}
+
+export async function parseErrorMessage(resp: Response, fallback: string): Promise<string> {
+  const body = await parseJson<TokenError>(resp);
+  return body?.error_description || body?.error || fallback;
+}
+
+export function createApiError(message: string, status?: number): Error & { status?: number } {
+  const error = new Error(message) as Error & { status?: number };
+  if (status !== undefined) error.status = status;
+  return error;
+}
+
+export function requiredError(messageKey: string): never {
+  throw new Error(t(messageKey));
+}
@@ -0,0 +1,686 @@
+import { base64ToBytes, decryptBw, decryptBwFileData, decryptStr, encryptBw, encryptBwFileData } from '../crypto';
+import type {
+  Cipher,
+  Folder,
+  ListResponse,
+  SessionState,
+  VaultDraft,
+  VaultDraftField,
+} from '../types';
+import {
+  BULK_API_CHUNK_SIZE,
+  chunkArray,
+  parseErrorMessage,
+  parseJson,
+  type AuthedFetch,
+} from './shared';
+
+export async function getFolders(authedFetch: AuthedFetch): Promise<Folder[]> {
+  const resp = await authedFetch('/api/folders');
+  if (!resp.ok) throw new Error('Failed to load folders');
+  const body = await parseJson<ListResponse<Folder>>(resp);
+  return body?.data || [];
+}
+
+export async function createFolder(
+  authedFetch: AuthedFetch,
+  session: SessionState,
+  name: string
+): Promise<{ id: string; name?: string | null }> {
+  if (!session.symEncKey || !session.symMacKey) throw new Error('Vault key unavailable');
+  const enc = base64ToBytes(session.symEncKey);
+  const mac = base64ToBytes(session.symMacKey);
+  const encryptedName = await encryptBw(new TextEncoder().encode(name), enc, mac);
+  const resp = await authedFetch('/api/folders', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ name: encryptedName }),
+  });
+  if (!resp.ok) throw new Error('Create folder failed');
+  const body = await parseJson<{ id?: string; name?: string | null }>(resp);
+  if (!body?.id) throw new Error('Create folder failed');
+  return { id: body.id, name: body.name ?? null };
+}
+
+export async function encryptFolderImportName(session: SessionState, name: string): Promise<string> {
+  if (!session.symEncKey || !session.symMacKey) throw new Error('Vault key unavailable');
+  const enc = base64ToBytes(session.symEncKey);
+  const mac = base64ToBytes(session.symMacKey);
+  return encryptBw(new TextEncoder().encode(name), enc, mac);
+}
+
+export async function deleteFolder(authedFetch: AuthedFetch, folderId: string): Promise<void> {
+  const id = String(folderId || '').trim();
+  if (!id) throw new Error('Folder id is required');
+  const resp = await authedFetch(`/api/folders/${encodeURIComponent(id)}`, {
+    method: 'DELETE',
+  });
+  if (!resp.ok) throw new Error('Delete folder failed');
+}
+
+export async function bulkDeleteFolders(authedFetch: AuthedFetch, ids: string[]): Promise<void> {
+  const uniqueIds = Array.from(new Set(ids.map((id) => String(id || '').trim()).filter(Boolean)));
+  for (const chunk of chunkArray(uniqueIds, BULK_API_CHUNK_SIZE)) {
+    const resp = await authedFetch('/api/folders/delete', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ ids: chunk }),
+    });
+    if (!resp.ok) throw new Error('Bulk delete folders failed');
+  }
+}
+
+export async function updateFolder(
+  authedFetch: AuthedFetch,
+  session: SessionState,
+  folderId: string,
+  name: string
+): Promise<void> {
+  const id = String(folderId || '').trim();
+  if (!id) throw new Error('Folder id is required');
+  if (!session.symEncKey || !session.symMacKey) throw new Error('Vault key unavailable');
+  const enc = base64ToBytes(session.symEncKey);
+  const mac = base64ToBytes(session.symMacKey);
+  const encryptedName = await encryptBw(new TextEncoder().encode(name), enc, mac);
+  const resp = await authedFetch(`/api/folders/${encodeURIComponent(id)}`, {
+    method: 'PUT',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({ name: encryptedName }),
+  });
+  if (!resp.ok) throw new Error('Update folder failed');
+}
+
+export async function getCiphers(authedFetch: AuthedFetch): Promise<Cipher[]> {
+  const resp = await authedFetch('/api/ciphers?deleted=true');
+  if (!resp.ok) throw new Error('Failed to load ciphers');
+  const body = await parseJson<ListResponse<Cipher>>(resp);
+  return body?.data || [];
+}
+
+export interface CiphersImportPayload {
+  ciphers: Array<Record<string, unknown>>;
+  folders: Array<{ name: string }>;
+  folderRelationships: Array<{ key: number; value: number }>;
+}
+
+export interface ImportedCipherMapEntry {
+  index: number;
+  sourceId: string | null;
+  id: string;
+}
+
+export async function importCiphers(
+  authedFetch: AuthedFetch,
+  payload: CiphersImportPayload,
+  options?: { returnCipherMap?: boolean }
+): Promise<ImportedCipherMapEntry[] | null> {
+  const returnCipherMap = !!options?.returnCipherMap;
+  const url = returnCipherMap ? '/api/ciphers/import?returnCipherMap=1' : '/api/ciphers/import';
+  const totalItems = (payload.folders?.length || 0) + (payload.ciphers?.length || 0);
+  const responses: ImportedCipherMapEntry[] = [];
+  const folderChunkSize = Math.min(BULK_API_CHUNK_SIZE, Math.max(0, BULK_API_CHUNK_SIZE - 1));
+
+  if (totalItems <= BULK_API_CHUNK_SIZE || payload.folders.length > folderChunkSize) {
+    const resp = await authedFetch(url, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify(payload),
+    });
+    if (!resp.ok) throw new Error(await parseErrorMessage(resp, 'Import failed'));
+    if (!returnCipherMap) return null;
+    const body =
+      (await parseJson<{
+        cipherMap?: Array<{ index?: number; sourceId?: string | null; id?: string }>;
+      }>(resp)) || {};
+    if (!Array.isArray(body.cipherMap)) return [];
+    for (const row of body.cipherMap) {
+      const index = Number(row?.index);
+      const id = String(row?.id || '').trim();
+      if (!Number.isFinite(index) || !id) continue;
+      const sourceRaw = String(row?.sourceId || '').trim();
+      responses.push({
+        index,
+        id,
+        sourceId: sourceRaw || null,
+      });
+    }
+    return responses;
+  }
+
+  const folders = payload.folders || [];
+  const relationshipsByCipher = new Map<number, number | null>();
+  for (const relation of payload.folderRelationships || []) {
+    relationshipsByCipher.set(Number(relation.key), Number(relation.value));
+  }
+
+  for (const cipherChunkStart of Array.from({ length: Math.ceil(payload.ciphers.length / BULK_API_CHUNK_SIZE) }, (_, i) => i * BULK_API_CHUNK_SIZE)) {
+    const cipherChunk = payload.ciphers.slice(cipherChunkStart, cipherChunkStart + BULK_API_CHUNK_SIZE);
+    const usedFolderIndices = Array.from(
+      new Set(
+        cipherChunk
+          .map((_, localIndex) => relationshipsByCipher.get(cipherChunkStart + localIndex))
+          .filter((value): value is number => Number.isFinite(value as number) && (value as number) >= 0)
+      )
+    );
+    const folderIndexMap = new Map<number, number>();
+    const chunkFolders = usedFolderIndices.map((folderIndex, localIndex) => {
+      folderIndexMap.set(folderIndex, localIndex);
+      return folders[folderIndex];
+    });
+    const chunkRelationships = cipherChunk
+      .map((_, localIndex) => {
+        const originalCipherIndex = cipherChunkStart + localIndex;
+        const originalFolderIndex = relationshipsByCipher.get(originalCipherIndex);
+        if (!Number.isFinite(originalFolderIndex as number)) return null;
+        const localFolderIndex = folderIndexMap.get(Number(originalFolderIndex));
+        if (!Number.isFinite(localFolderIndex as number)) return null;
+        return { key: localIndex, value: Number(localFolderIndex) };
+      })
+      .filter((value): value is { key: number; value: number } => !!value);
+
+    const resp = await authedFetch(url, {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({
+        ciphers: cipherChunk,
+        folders: chunkFolders,
+        folderRelationships: chunkRelationships,
+      }),
+    });
+    if (!resp.ok) throw new Error(await parseErrorMessage(resp, 'Import failed'));
+    if (!returnCipherMap) continue;
+    const body =
+      (await parseJson<{
+        cipherMap?: Array<{ index?: number; sourceId?: string | null; id?: string }>;
+      }>(resp)) || {};
+    for (const row of body.cipherMap || []) {
+      const localIndex = Number(row?.index);
+      const id = String(row?.id || '').trim();
+      if (!Number.isFinite(localIndex) || !id) continue;
+      const sourceRaw = String(row?.sourceId || '').trim();
+      responses.push({
+        index: cipherChunkStart + localIndex,
+        id,
+        sourceId: sourceRaw || null,
+      });
+    }
+  }
+  return returnCipherMap ? responses : null;
+}
+
+export interface AttachmentDownloadInfo {
+  id: string;
+  url: string;
+  fileName: string | null;
+  key: string | null;
+  size: string | null;
+  sizeName: string | null;
+}
+
+export async function getAttachmentDownloadInfo(
+  authedFetch: AuthedFetch,
+  cipherId: string,
+  attachmentId: string
+): Promise<AttachmentDownloadInfo> {
+  const resp = await authedFetch(`/api/ciphers/${encodeURIComponent(cipherId)}/attachment/${encodeURIComponent(attachmentId)}`);
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, 'Failed to load attachment'));
+  const body =
+    (await parseJson<{
+      id?: string;
+      url?: string;
+      fileName?: string | null;
+      key?: string | null;
+      size?: string | null;
+      sizeName?: string | null;
+    }>(resp)) || {};
+  const id = String(body.id || attachmentId || '').trim();
+  const url = String(body.url || '').trim();
+  if (!id || !url) throw new Error('Invalid attachment download response');
+  return {
+    id,
+    url,
+    fileName: body.fileName ?? null,
+    key: body.key ?? null,
+    size: body.size ?? null,
+    sizeName: body.sizeName ?? null,
+  };
+}
+
+function looksLikeCipherString(value: unknown): boolean {
+  return /^\d+\.[A-Za-z0-9+/=]+\|[A-Za-z0-9+/=]+(?:\|[A-Za-z0-9+/=]+)?$/.test(String(value || '').trim());
+}
+
+export async function uploadCipherAttachment(
+  authedFetch: AuthedFetch,
+  session: SessionState,
+  cipherId: string,
+  file: File,
+  cipherForKey?: Cipher | null
+): Promise<void> {
+  if (!session.symEncKey || !session.symMacKey) throw new Error('Vault key unavailable');
+  const id = String(cipherId || '').trim();
+  if (!id) throw new Error('Cipher id is required');
+  if (!file) throw new Error('File is required');
+
+  const userEnc = base64ToBytes(session.symEncKey);
+  const userMac = base64ToBytes(session.symMacKey);
+  const itemKeys = await getCipherKeys(cipherForKey || null, userEnc, userMac);
+
+  const encryptedFileName = await encryptTextValue(file.name, itemKeys.enc, itemKeys.mac);
+  if (!encryptedFileName) throw new Error('Invalid attachment name');
+
+  const attachmentRawKey = crypto.getRandomValues(new Uint8Array(64));
+  const attachmentWrappedKey = await encryptBw(attachmentRawKey, itemKeys.enc, itemKeys.mac);
+  const fileBytes = new Uint8Array(await file.arrayBuffer());
+  const encryptedBytes = await encryptBwFileData(fileBytes, attachmentRawKey.slice(0, 32), attachmentRawKey.slice(32, 64));
+
+  const metaResp = await authedFetch(`/api/ciphers/${encodeURIComponent(id)}/attachment/v2`, {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify({
+      fileName: encryptedFileName,
+      key: attachmentWrappedKey,
+      fileSize: encryptedBytes.byteLength,
+    }),
+  });
+  if (!metaResp.ok) throw new Error(await parseErrorMessage(metaResp, 'Create attachment failed'));
+
+  const meta =
+    (await parseJson<{
+      attachmentId?: string;
+      url?: string;
+    }>(metaResp)) || {};
+  const attachmentId = String(meta.attachmentId || '').trim();
+  const uploadUrl = String(meta.url || '').trim();
+  if (!attachmentId || !uploadUrl) throw new Error('Create attachment failed');
+
+  const payload = new ArrayBuffer(encryptedBytes.byteLength);
+  new Uint8Array(payload).set(encryptedBytes);
+  const formData = new FormData();
+  formData.set('data', new Blob([payload], { type: 'application/octet-stream' }), encryptedFileName);
+
+  const uploadResp = await authedFetch(uploadUrl, {
+    method: 'POST',
+    body: formData,
+  });
+  if (!uploadResp.ok) {
+    try {
+      await authedFetch(`/api/ciphers/${encodeURIComponent(id)}/attachment/${encodeURIComponent(attachmentId)}`, { method: 'DELETE' });
+    } catch {
+      // ignore rollback failure
+    }
+    throw new Error(await parseErrorMessage(uploadResp, 'Upload attachment failed'));
+  }
+}
+
+export async function deleteCipherAttachment(
+  authedFetch: AuthedFetch,
+  cipherId: string,
+  attachmentId: string
+): Promise<void> {
+  const cid = String(cipherId || '').trim();
+  const aid = String(attachmentId || '').trim();
+  if (!cid || !aid) throw new Error('Attachment id is required');
+  const resp = await authedFetch(`/api/ciphers/${encodeURIComponent(cid)}/attachment/${encodeURIComponent(aid)}`, {
+    method: 'DELETE',
+  });
+  if (!resp.ok) throw new Error(await parseErrorMessage(resp, 'Delete attachment failed'));
+}
+
+export async function downloadCipherAttachmentDecrypted(
+  authedFetch: AuthedFetch,
+  session: SessionState,
+  cipher: Cipher,
+  attachmentId: string
+): Promise<{ fileName: string; bytes: Uint8Array }> {
+  if (!session.symEncKey || !session.symMacKey) throw new Error('Vault key unavailable');
+  const cid = String(cipher?.id || '').trim();
+  const aid = String(attachmentId || '').trim();
+  if (!cid || !aid) throw new Error('Attachment id is required');
+
+  const info = await getAttachmentDownloadInfo(authedFetch, cid, aid);
+  const rawResp = await fetch(info.url, { cache: 'no-store' });
+  if (!rawResp.ok) throw new Error('Download attachment failed');
+  const encryptedBytes = new Uint8Array(await rawResp.arrayBuffer());
+
+  const userEnc = base64ToBytes(session.symEncKey);
+  const userMac = base64ToBytes(session.symMacKey);
+  const itemKeys = await getCipherKeys(cipher, userEnc, userMac);
+
+  let fileEnc = itemKeys.enc;
+  let fileMac = itemKeys.mac;
+  const keyCipher = String(info.key || '').trim();
+  if (keyCipher && looksLikeCipherString(keyCipher)) {
+    try {
+      const fileRawKey = await decryptBw(keyCipher, itemKeys.enc, itemKeys.mac);
+      if (fileRawKey.length >= 64) {
+        fileEnc = fileRawKey.slice(0, 32);
+        fileMac = fileRawKey.slice(32, 64);
+      }
+    } catch {
+      // fallback to item key
+    }
+  }
+
+  const plainBytes = await decryptBwFileData(encryptedBytes, fileEnc, fileMac);
+
+  const fileNameRaw = String(info.fileName || '').trim();
+  let fileName = fileNameRaw || `attachment-${aid}`;
+  if (fileNameRaw && looksLikeCipherString(fileNameRaw)) {
+    try {
+      fileName = (await decryptStr(fileNameRaw, itemKeys.enc, itemKeys.mac)) || fileName;
+    } catch {
+      // keep fallback name
+    }
+  }
+
+  return { fileName, bytes: plainBytes };
+}
+
+function asNullable(v: string): string | null {
+  const s = String(v || '').trim();
+  return s ? s : null;
+}
+
+function parseFieldType(v: number | string): 0 | 1 | 2 | 3 {
+  if (typeof v === 'number') {
+    if (v === 1 || v === 2 || v === 3) return v;
+    return 0;
+  }
+  const s = String(v).trim().toLowerCase();
+  if (s === '1' || s === 'hidden') return 1;
+  if (s === '2' || s === 'boolean' || s === 'checkbox') return 2;
+  if (s === '3' || s === 'linked' || s === 'link') return 3;
+  return 0;
+}
+
+async function encryptTextValue(value: string, enc: Uint8Array, mac: Uint8Array): Promise<string | null> {
+  const s = String(value || '');
+  if (!s.trim()) return null;
+  return encryptBw(new TextEncoder().encode(s), enc, mac);
+}
+
+async function encryptCustomFields(
+  fields: VaultDraftField[],
+  enc: Uint8Array,
+  mac: Uint8Array
+): Promise<Array<{ type: number; name: string | null; value: string | null }>> {
+  const out: Array<{ type: number; name: string | null; value: string | null }> = [];
+  for (const field of fields || []) {
+    const label = String(field.label || '').trim();
+    if (!label) continue;
+    out.push({
+      type: parseFieldType(field.type),
+      name: await encryptTextValue(label, enc, mac),
+      value: await encryptTextValue(String(field.value || ''), enc, mac),
+    });
+  }
+  return out;
+}
+
+async function encryptUris(uris: string[], enc: Uint8Array, mac: Uint8Array): Promise<Array<{ uri: string | null; match: null }>> {
+  const out: Array<{ uri: string | null; match: null }> = [];
+  for (const uri of uris || []) {
+    const trimmed = String(uri || '').trim();
+    if (!trimmed) continue;
+    out.push({ uri: await encryptTextValue(trimmed, enc, mac), match: null });
+  }
+  return out;
+}
+
+function toIsoDateOrNow(value: unknown): string {
+  const raw = String(value ?? '').trim();
+  if (!raw) return new Date().toISOString();
+  const parsed = new Date(raw);
+  if (!Number.isFinite(parsed.getTime())) return new Date().toISOString();
+  return parsed.toISOString();
+}
+
+async function encryptMaybeFidoValue(
+  value: unknown,
+  enc: Uint8Array,
+  mac: Uint8Array,
+  fallback = ''
+): Promise<string> {
+  const normalized = String(value ?? '').trim() || fallback;
+  if (looksLikeCipherString(normalized)) return normalized;
+  return encryptBw(new TextEncoder().encode(normalized), enc, mac);
+}
+
+async function encryptMaybeNullableFidoValue(
+  value: unknown,
+  enc: Uint8Array,
+  mac: Uint8Array
+): Promise<string | null> {
+  const normalized = String(value ?? '').trim();
+  if (!normalized) return null;
+  if (looksLikeCipherString(normalized)) return normalized;
+  return encryptBw(new TextEncoder().encode(normalized), enc, mac);
+}
+
+async function normalizeFido2Credentials(
+  credentials: Array<Record<string, unknown>> | null | undefined,
+  enc: Uint8Array,
+  mac: Uint8Array
+): Promise<Array<Record<string, unknown>> | null> {
+  if (!Array.isArray(credentials) || credentials.length === 0) return null;
+  const out: Array<Record<string, unknown>> = [];
+  for (const credential of credentials) {
+    if (!credential || typeof credential !== 'object') continue;
+    out.push({
+      credentialId: await encryptMaybeFidoValue(credential.credentialId, enc, mac),
+      keyType: await encryptMaybeFidoValue(credential.keyType, enc, mac, 'public-key'),
+      keyAlgorithm: await encryptMaybeFidoValue(credential.keyAlgorithm, enc, mac, 'ECDSA'),
+      keyCurve: await encryptMaybeFidoValue(credential.keyCurve, enc, mac, 'P-256'),
+      keyValue: await encryptMaybeFidoValue(credential.keyValue, enc, mac),
+      rpId: await encryptMaybeFidoValue(credential.rpId, enc, mac),
+      rpName: await encryptMaybeNullableFidoValue(credential.rpName, enc, mac),
+      userHandle: await encryptMaybeNullableFidoValue(credential.userHandle, enc, mac),
+      userName: await encryptMaybeNullableFidoValue(credential.userName, enc, mac),
+      userDisplayName: await encryptMaybeNullableFidoValue(credential.userDisplayName, enc, mac),
+      counter: await encryptMaybeFidoValue(credential.counter, enc, mac, '0'),
+      discoverable: await encryptMaybeFidoValue(credential.discoverable, enc, mac, 'false'),
+      creationDate: toIsoDateOrNow(credential.creationDate),
+    });
+  }
+  return out.length ? out : null;
+}
+
+async function getCipherKeys(
+  cipher: Cipher | null,
+  userEnc: Uint8Array,
+  userMac: Uint8Array
+): Promise<{ enc: Uint8Array; mac: Uint8Array; key: string | null }> {
+  if (cipher?.key) {
+    try {
+      const raw = await decryptBw(cipher.key, userEnc, userMac);
+      if (raw.length >= 64) return { enc: raw.slice(0, 32), mac: raw.slice(32, 64), key: cipher.key };
+    } catch {
+      // use user key
+    }
+  }
+  return { enc: userEnc, mac: userMac, key: null };
+}
+
+async function buildCipherPayload(
+  session: SessionState,
+  draft: VaultDraft,
+  cipher: Cipher | null
+): Promise<Record<string, unknown>> {
+  if (!session.symEncKey || !session.symMacKey) throw new Error('Vault key unavailable');
+  const userEnc = base64ToBytes(session.symEncKey);
+  const userMac = base64ToBytes(session.symMacKey);
+  const keys = await getCipherKeys(cipher, userEnc, userMac);
+  const type = Number(draft.type || cipher?.type || 1);
+
+  const payload: Record<string, unknown> = {
+    type,
+    favorite: !!draft.favorite,
+    folderId: asNullable(draft.folderId),
+    reprompt: draft.reprompt ? 1 : 0,
+    name: await encryptTextValue(draft.name, keys.enc, keys.mac),
+    notes: await encryptTextValue(draft.notes, keys.enc, keys.mac),
+    login: null,
+    card: null,
+    identity: null,
+    secureNote: null,
+    sshKey: null,
+    fields: await encryptCustomFields(draft.customFields || [], keys.enc, keys.mac),
+  };
+
+  if (cipher?.id) {
+    payload.id = cipher.id;
+    payload.key = keys.key;
+  }
+
+  if (type === 1) {
+    const existingFido2 =
+      cipher?.login && Array.isArray((cipher.login as any).fido2Credentials)
+        ? (cipher.login as any).fido2Credentials
+        : draft.loginFido2Credentials;
+    payload.login = {
+      username: await encryptTextValue(draft.loginUsername, keys.enc, keys.mac),
+      password: await encryptTextValue(draft.loginPassword, keys.enc, keys.mac),
+      totp: await encryptTextValue(draft.loginTotp, keys.enc, keys.mac),
+      fido2Credentials: await normalizeFido2Credentials(existingFido2, keys.enc, keys.mac),
+      uris: await encryptUris(draft.loginUris || [], keys.enc, keys.mac),
+    };
+  } else if (type === 3) {
+    payload.card = {
+      cardholderName: await encryptTextValue(draft.cardholderName, keys.enc, keys.mac),
+      number: await encryptTextValue(draft.cardNumber, keys.enc, keys.mac),
+      brand: await encryptTextValue(draft.cardBrand, keys.enc, keys.mac),
+      expMonth: await encryptTextValue(draft.cardExpMonth, keys.enc, keys.mac),
+      expYear: await encryptTextValue(draft.cardExpYear, keys.enc, keys.mac),
+      code: await encryptTextValue(draft.cardCode, keys.enc, keys.mac),
+    };
+  } else if (type === 4) {
+    payload.identity = {
+      title: await encryptTextValue(draft.identTitle, keys.enc, keys.mac),
+      firstName: await encryptTextValue(draft.identFirstName, keys.enc, keys.mac),
+      middleName: await encryptTextValue(draft.identMiddleName, keys.enc, keys.mac),
+      lastName: await encryptTextValue(draft.identLastName, keys.enc, keys.mac),
+      username: await encryptTextValue(draft.identUsername, keys.enc, keys.mac),
+      company: await encryptTextValue(draft.identCompany, keys.enc, keys.mac),
+      ssn: await encryptTextValue(draft.identSsn, keys.enc, keys.mac),
+      passportNumber: await encryptTextValue(draft.identPassportNumber, keys.enc, keys.mac),
+      licenseNumber: await encryptTextValue(draft.identLicenseNumber, keys.enc, keys.mac),
+      email: await encryptTextValue(draft.identEmail, keys.enc, keys.mac),
+      phone: await encryptTextValue(draft.identPhone, keys.enc, keys.mac),
+      address1: await encryptTextValue(draft.identAddress1, keys.enc, keys.mac),
+      address2: await encryptTextValue(draft.identAddress2, keys.enc, keys.mac),
+      address3: await encryptTextValue(draft.identAddress3, keys.enc, keys.mac),
+      city: await encryptTextValue(draft.identCity, keys.enc, keys.mac),
+      state: await encryptTextValue(draft.identState, keys.enc, keys.mac),
+      postalCode: await encryptTextValue(draft.identPostalCode, keys.enc, keys.mac),
+      country: await encryptTextValue(draft.identCountry, keys.enc, keys.mac),
+    };
+  } else if (type === 5) {
+    const encryptedFingerprint = await encryptTextValue(draft.sshFingerprint, keys.enc, keys.mac);
+    payload.sshKey = {
+      privateKey: await encryptTextValue(draft.sshPrivateKey, keys.enc, keys.mac),
+      publicKey: await encryptTextValue(draft.sshPublicKey, keys.enc, keys.mac),
+      keyFingerprint: encryptedFingerprint,
+      fingerprint: encryptedFingerprint,
+    };
+  } else if (type === 2) {
+    payload.secureNote = { type: 0 };
+  }
+
+  return payload;
+}
+
+export async function buildCipherImportPayload(session: SessionState, draft: VaultDraft): Promise<Record<string, unknown>> {
+  return buildCipherPayload(session, draft, null);
+}
+
+export async function createCipher(
+  authedFetch: AuthedFetch,
+  session: SessionState,
+  draft: VaultDraft
+): Promise<{ id: string }> {
+  const payload = await buildCipherPayload(session, draft, null);
+
+  const resp = await authedFetch('/api/ciphers', {
+    method: 'POST',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(payload),
+  });
+  if (!resp.ok) throw new Error('Create item failed');
+  const body = await parseJson<{ id?: string }>(resp);
+  if (!body?.id) throw new Error('Create item failed');
+  return { id: body.id };
+}
+
+export async function updateCipher(
+  authedFetch: AuthedFetch,
+  session: SessionState,
+  cipher: Cipher,
+  draft: VaultDraft
+): Promise<void> {
+  const payload = await buildCipherPayload(session, draft, cipher);
+
+  const resp = await authedFetch(`/api/ciphers/${encodeURIComponent(cipher.id)}`, {
+    method: 'PUT',
+    headers: { 'Content-Type': 'application/json' },
+    body: JSON.stringify(payload),
+  });
+  if (!resp.ok) throw new Error('Update item failed');
+}
+
+export async function deleteCipher(authedFetch: AuthedFetch, cipherId: string): Promise<void> {
+  const resp = await authedFetch(`/api/ciphers/${encodeURIComponent(cipherId)}`, { method: 'DELETE' });
+  if (!resp.ok) throw new Error('Delete item failed');
+}
+
+export async function bulkDeleteCiphers(authedFetch: AuthedFetch, ids: string[]): Promise<void> {
+  const uniqueIds = Array.from(new Set(ids.map((id) => String(id || '').trim()).filter(Boolean)));
+  for (const chunk of chunkArray(uniqueIds, BULK_API_CHUNK_SIZE)) {
+    const resp = await authedFetch('/api/ciphers/delete', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ ids: chunk }),
+    });
+    if (!resp.ok) throw new Error('Bulk delete failed');
+  }
+}
+
+export async function bulkPermanentDeleteCiphers(authedFetch: AuthedFetch, ids: string[]): Promise<void> {
+  const uniqueIds = Array.from(new Set(ids.map((id) => String(id || '').trim()).filter(Boolean)));
+  for (const chunk of chunkArray(uniqueIds, BULK_API_CHUNK_SIZE)) {
+    const resp = await authedFetch('/api/ciphers/delete-permanent', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ ids: chunk }),
+    });
+    if (!resp.ok) throw new Error('Bulk permanent delete failed');
+  }
+}
+
+export async function bulkRestoreCiphers(authedFetch: AuthedFetch, ids: string[]): Promise<void> {
+  const uniqueIds = Array.from(new Set(ids.map((id) => String(id || '').trim()).filter(Boolean)));
+  for (const chunk of chunkArray(uniqueIds, BULK_API_CHUNK_SIZE)) {
+    const resp = await authedFetch('/api/ciphers/restore', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ ids: chunk }),
+    });
+    if (!resp.ok) throw new Error('Bulk restore failed');
+  }
+}
+
+export async function bulkMoveCiphers(
+  authedFetch: AuthedFetch,
+  ids: string[],
+  folderId: string | null
+): Promise<void> {
+  const uniqueIds = Array.from(new Set(ids.map((id) => String(id || '').trim()).filter(Boolean)));
+  for (const chunk of chunkArray(uniqueIds, BULK_API_CHUNK_SIZE)) {
+    const resp = await authedFetch('/api/ciphers/move', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ ids: chunk, folderId }),
+    });
+    if (!resp.ok) throw new Error('Bulk move failed');
+  }
+}