fix(auth): reject captcha promise on token expiry

onExpire now rejects the pending promise so the form doesn't hang
if the Turnstile token expires mid-challenge.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: waleedlatif1

apps/sim/app/(auth)/login/login-form.tsx

@@ -512,7 +512,12 @@ export default function LoginPage({
                 captchaResolveRef.current = null
                 captchaRejectRef.current = null
               }}
-              onExpire={() => setCaptchaToken(null)}
+              onExpire={() => {
+                setCaptchaToken(null)
+                captchaRejectRef.current?.(new Error('Captcha expired'))
+                captchaResolveRef.current = null
+                captchaRejectRef.current = null
+              }}
               options={{ size: 'invisible', execution: 'execute' }}
             />
           )}

apps/sim/app/(auth)/signup/signup-form.tsx

@@ -505,7 +505,12 @@ function SignupFormContent({
                 captchaResolveRef.current = null
                 captchaRejectRef.current = null
               }}
-              onExpire={() => setCaptchaToken(null)}
+              onExpire={() => {
+                setCaptchaToken(null)
+                captchaRejectRef.current?.(new Error('Captcha expired'))
+                captchaResolveRef.current = null
+                captchaRejectRef.current = null
+              }}
               options={{ size: 'invisible', execution: 'execute' }}
             />
           )}