Runtime split driven by window.Capacitor.isNativePlatform():
Web browser
- No token in localStorage / sessionStorage — XSS can't read it
- Server-set httpOnly cookie carries the session
- fetch() default credentials='same-origin' sends the cookie
- getAuthHeaders() returns Content-Type only, no Authorization
- Middleware already falls back to cookie when Bearer is absent
Capacitor native (iOS / Android)
- Unchanged — Bearer token lives in Keychain / Keystore via the
capacitor-secure-storage-plugin SecureStorage wrapper
- Bearer header still sent on every request
enterApp() / clearSession() / getAuthHeaders() all now branch on
isNativeApp(). Legacy localStorage entries from the dual-mode era
are wiped on clearSession() for users migrating in.
Rollback: git reset --hard pre-httponly-only-2026-04-14
Web still uses localStorage; Capacitor native app now routes
token/user/session-id through capacitor-secure-storage-plugin
(iOS Keychain, Android EncryptedSharedPreferences / Keystore).
A thin SecureStorage wrapper detects Capacitor at runtime and
falls back to localStorage elsewhere, keeping a single auth.js
codebase for both targets.
To activate on mobile: cd mobile && npm install && npx cap sync android
