fix: update auth callback routing to redirect to '/welcome' for pending checkouts

app/auth/callback/page.tsx

@@ -52,8 +52,12 @@ function AuthCallbackContent() {
         const result = await setSessionAction(token, refreshToken)
         if (result.success && result.user) {
           login(result.user)
-          const returnTo = searchParams.get('returnTo') || '/'
+          if (typeof window !== 'undefined' && localStorage.getItem('pulse_pending_checkout')) {
-          router.push(returnTo)
+            router.push('/welcome')
+          } else {
+            const returnTo = searchParams.get('returnTo') || '/'
+            router.push(returnTo)
+          }
         } else {
           setError(authMessageFromErrorType('invalid'))
         }