fix: password sign-in for 2FA accounts could silently bounce to /login (v0.50.1)

signIn.email() resolves with error: null and data.twoFactorRedirect: true
for 2FA-enabled accounts — no full session exists yet. The login page's
handleSubmit treated any non-error response as fully signed in and called
router.push("/recipes"), racing better-auth's own window.location.href
redirect to /verify-2fa (twoFactorClient's onSuccess hook). When the app's
push won that race, middleware bounced the unauthenticated /recipes
request straight back to /login with no error surfaced — looked like the
page just reloaded.

Now explicitly skips the /recipes push when twoFactorRedirect is set,
leaving the SDK's own redirect to run uncontested.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "epicure",
-  "version": "0.50.0",
+  "version": "0.50.1",
   "private": true,
   "scripts": {
     "dev": "pnpm --filter web dev",