feat: vendor sidebar section, remove example tenant, add Logto link

- Sidebar: Tenants moved into expandable "Vendor" section with
  sub-items for Tenants and Identity (Logto console link)
- Bootstrap: removed example organization creation (Phase 6 org)
  — tenants are now created exclusively via the vendor console
- Removed BootstrapDataSeeder (no auto-seeded tenant/license)
- Bootstrap log updated to reflect clean-slate approach

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/components/Layout.tsx

@@ -4,7 +4,7 @@ import {
   Sidebar,
   TopBar,
 } from '@cameleer/design-system';
-import { LayoutDashboard, ShieldCheck, Server, Users, Settings, KeyRound, Building } from 'lucide-react';
+import { LayoutDashboard, ShieldCheck, Server, Users, Settings, KeyRound, Building, Fingerprint } from 'lucide-react';
 import { useAuth } from '../auth/useAuth';
 import { useScopes } from '../auth/useScopes';
 import { useOrgStore } from '../auth/useOrganization';
@@ -62,12 +62,25 @@ export function Layout() {
       {isVendor && (
         <Sidebar.Section
           icon={<Building size={16} />}
-          label="Tenants"
-          open={false}
-          active={isActive(location, '/vendor/tenants')}
+          label="Vendor"
+          open={onVendorRoute}
+          active={isActive(location, '/vendor')}
           onToggle={() => navigate('/vendor/tenants')}
         >
-          {null}
+          <div
+            style={{ padding: '6px 12px 6px 36px', fontSize: 13, cursor: 'pointer',
+              color: isActive(location, '/vendor/tenants') ? 'var(--text-primary)' : 'var(--text-muted)' }}
+            onClick={() => navigate('/vendor/tenants')}
+          >
+            Tenants
+          </div>
+          <div
+            style={{ padding: '6px 12px 6px 36px', fontSize: 13, cursor: 'pointer', color: 'var(--text-muted)' }}
+            onClick={() => window.open('/console', '_blank', 'noopener')}
+          >
+            <Fingerprint size={13} style={{ verticalAlign: 'middle', marginRight: 6 }} />
+            Identity (Logto)
+          </div>
         </Sidebar.Section>
       )}