fix: onboarding wizard navigates to dashboard instead of first issue

After onboarding, the wizard navigated to the newly created issue
(e.g. /JAR/issues/JAR-1). useCompanyPageMemory then saved this path,
causing every subsequent company switch to land on that stale issue
instead of the dashboard.

Remove the issue-specific navigation branch so handleLaunch always
falls through to the dashboard route.

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

ui/src/components/OnboardingWizard.tsx

@@ -500,10 +500,6 @@ export function OnboardingWizard() {
     setLoading(false);
     reset();
     closeOnboarding();
-    if (createdCompanyPrefix && createdIssueRef) {
-      navigate(`/${createdCompanyPrefix}/issues/${createdIssueRef}`);
-      return;
-    }
     if (createdCompanyPrefix) {
       navigate(`/${createdCompanyPrefix}/dashboard`);
       return;