feat(landing): update subnav items to API, SDK, MCP, CLI, Lab

- Docs layout: API (active), SDK/MCP/CLI/Lab (disabled)
- Demo layout: API, SDK/MCP/CLI (disabled), Lab (active, links to demo)
- Disabled items show "Coming soon" tooltip on hover

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/landing/src/app/(apps)/demo/layout.tsx

@@ -6,9 +6,11 @@ import { ApiKeyProvider } from '@/components/shared/ApiKeyWidget/apikey-context'
 import { PageProvider } from '@/contexts/page-context';
 
 const navItems = [
-  { label: 'Text to Image', href: '/demo/tti' },
-  { label: 'Upload', href: '/demo/upload' },
-  { label: 'Gallery', href: '/demo/gallery' },
+  { label: 'API', href: '/docs' },
+  { label: 'SDK', href: '#', disabled: true },
+  { label: 'MCP', href: '#', disabled: true },
+  { label: 'CLI', href: '#', disabled: true },
+  { label: 'Lab', href: '/demo/tti' },
 ];
 
 export default function DemoLayout({ children }: { children: React.ReactNode }) {

apps/landing/src/app/(apps)/docs/layout.tsx

@@ -8,9 +8,11 @@ import { ApiKeyProvider } from '@/components/shared/ApiKeyWidget/apikey-context'
 import { PageProvider } from '@/contexts/page-context';
 
 const navItems = [
-  { label: 'Documentation', href: '/docs' },
-  { label: 'Demo', href: '/demo' },
-  { label: 'Examples', href: '/docs/examples' },
+  { label: 'API', href: '/docs' },
+  { label: 'SDK', href: '#', disabled: true },
+  { label: 'MCP', href: '#', disabled: true },
+  { label: 'CLI', href: '#', disabled: true },
+  { label: 'Lab', href: '#', disabled: true },
 ];
 
 export default function DocsRootLayout({ children }: { children: React.ReactNode }) {