fix(auth-callback): post-PKCE navigate to /dashboard not /console/dashboard (#1016)

Last leftover from PR #983's URL contract that PR #992 reverts undid.
PR #996 caught the auth_handover.go + router.tsx /console/dashboard
references but missed AuthCallbackPage.tsx:80. The Sovereign-side
PKCE callback after Keycloak login was navigating to a route that
doesn't exist in the consoleLayoutRoute tree.

Found while verifying otech124 mid-Phase-1.

Co-authored-by: hatiyildiz <hatice.yildiz@openova.io>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

products/catalyst/bootstrap/ui/src/pages/auth/AuthCallbackPage.tsx

@@ -77,7 +77,7 @@ function SovereignCallbackPage() {
         await handleCallback(sovereignFQDN, params)
         // Navigate to the console dashboard — replace so the callback
         // URL doesn't appear in browser history.
-        router.navigate({ to: '/console/dashboard' as never, replace: true })
+        router.navigate({ to: '/dashboard' as never, replace: true })
       } catch (err) {
         setState({
           status: 'error',