feat: add permanent trust functionality for devices with corresponding API and UI updates

src/handlers/devices.ts

@@ -6,6 +6,8 @@ import { errorResponse, jsonResponse } from '../utils/response';
 import { readKnownDeviceProbe } from '../utils/device';
 import { generateUUID } from '../utils/uuid';
 
+const PERMANENT_TRUST_EXPIRES_AT_MS = Date.UTC(2099, 11, 31, 23, 59, 59);
+
 function normalizeIdentifier(value: string | null | undefined): string {
   return String(value || '').trim();
 }
@@ -268,6 +270,29 @@ export async function handleRevokeTrustedDevice(
   return jsonResponse({ success: true, removed });
 }
 
+// POST /api/devices/authorized/:deviceIdentifier/permanent
+// Upgrades an existing active 2FA remember-token record to permanent trust.
+export async function handleTrustDevicePermanently(
+  request: Request,
+  env: Env,
+  userId: string,
+  deviceIdentifier: string
+): Promise<Response> {
+  void request;
+  const normalized = String(deviceIdentifier || '').trim();
+  if (!normalized) return errorResponse('Invalid device identifier', 400);
+
+  const storage = new StorageService(env.DB);
+  const updated = await storage.updateTrustedTwoFactorTokensExpiryByDevice(userId, normalized, PERMANENT_TRUST_EXPIRES_AT_MS);
+  if (!updated) return errorResponse('Device is not currently trusted', 409);
+
+  return jsonResponse({
+    success: true,
+    updated,
+    trustedUntil: new Date(PERMANENT_TRUST_EXPIRES_AT_MS).toISOString(),
+  });
+}
+
 // DELETE /api/devices/:deviceIdentifier
 export async function handleDeleteDevice(
   request: Request,

src/router-devices.ts

@@ -11,6 +11,7 @@ import {
   handleDeactivateDevice,
   handleRevokeAllTrustedDevices,
   handleRevokeTrustedDevice,
+  handleTrustDevicePermanently,
   handleDeleteAllDevices,
   handleDeleteDevice,
   handleUpdateDeviceName,
@@ -44,6 +45,12 @@ export async function handleAuthenticatedDeviceRoute(
     return handleRevokeTrustedDevice(request, env, userId, deviceIdentifier);
   }
 
+  const permanentAuthorizedDeviceMatch = path.match(/^\/api\/devices\/authorized\/([^/]+)\/permanent$/i);
+  if (permanentAuthorizedDeviceMatch && method === 'POST') {
+    const deviceIdentifier = decodeURIComponent(permanentAuthorizedDeviceMatch[1]);
+    return handleTrustDevicePermanently(request, env, userId, deviceIdentifier);
+  }
+
   const deleteDeviceMatch = path.match(/^\/api\/devices\/([^/]+)$/i);
   if (deleteDeviceMatch && method === 'GET') {
     const deviceIdentifier = decodeURIComponent(deleteDeviceMatch[1]);

src/services/storage-device-repo.ts

@@ -233,6 +233,21 @@ export async function deleteTrustedTwoFactorTokensByUserId(db: D1Database, userI
   return Number(result.meta.changes ?? 0);
 }
 
+export async function updateTrustedTwoFactorTokensExpiryByDevice(
+  db: D1Database,
+  userId: string,
+  deviceIdentifier: string,
+  expiresAtMs: number
+): Promise<number> {
+  const now = Date.now();
+  await db.prepare('DELETE FROM trusted_two_factor_device_tokens WHERE expires_at < ?').bind(now).run();
+  const result = await db
+    .prepare('UPDATE trusted_two_factor_device_tokens SET expires_at = ? WHERE user_id = ? AND device_identifier = ? AND expires_at >= ?')
+    .bind(expiresAtMs, userId, deviceIdentifier, now)
+    .run();
+  return Number(result.meta.changes ?? 0);
+}
+
 export async function saveTrustedTwoFactorDeviceToken(
   db: D1Database,
   trustedTokenKey: TrustedTokenKeyFn,

src/services/storage.ts

@@ -96,6 +96,7 @@ import {
   upsertDevice as saveStoredDevice,
   updateDeviceName as updateStoredDeviceName,
   updateDeviceKeys as updateStoredDeviceKeys,
+  updateTrustedTwoFactorTokensExpiryByDevice as updateStoredTrustedTokensExpiryByDevice,
 } from './storage-device-repo';
 import {
   ensureUsedAttachmentDownloadTokenTable as ensureStoredAttachmentTokenTable,
@@ -614,6 +615,10 @@ export class StorageService {
     return deleteStoredTrustedTokensByUserId(this.db, userId);
   }
 
+  async updateTrustedTwoFactorTokensExpiryByDevice(userId: string, deviceIdentifier: string, expiresAtMs: number): Promise<number> {
+    return updateStoredTrustedTokensExpiryByDevice(this.db, userId, deviceIdentifier, expiresAtMs);
+  }
+
   // --- Trusted 2FA remember tokens (device-bound) ---
 
   async saveTrustedTwoFactorDeviceToken(