The Turnstile challenge failed reliably inside the Capacitor WebView,
which blocked login and registration from the Android app.
Three separate causes:
1. Android WebView blocks third-party cookies by default. Turnstile runs
in a cross-origin iframe from challenges.cloudflare.com and needs its
own storage, so the widget never emitted a token. MainActivity now
calls setAcceptThirdPartyCookies on the app's own WebView.
2. The register handler read the Turnstile response with an unscoped
document.querySelector, which matched the *login* widget's input (it
comes first in the DOM). Registration therefore submitted the login
widget's token — single-use with a 5 minute expiry, so any prior login
attempt or slow signup made it fail server-side.
3. The register and forgot-password widgets auto-rendered inside forms
that start at display:none, where Turnstile does not reliably complete
a challenge, and nothing re-rendered them when the form was shown.
Widgets are now rendered explicitly when their form first becomes
visible, and tokens are captured from the render callback instead of
being read back out of the injected input — which makes the unscoped
lookup in (2) structurally impossible. Added error/expired/timeout
callbacks so a widget failure surfaces the Cloudflare error code instead
of failing silently behind a generic toast.
Login is no longer gated at all. It is the path mobile users hit
constantly, and it is already covered by a 10-per-15-min per-IP rate
limit, a constant-time credential check, and TOTP 2FA. Registration and
password reset — the endpoints that actually attract bots — stay gated.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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