Move GitHub link from homepage buttons to fumadocs icon

[Copilot]

Consolidates GitHub repository links from multiple homepage CTAs into a single icon in the navigation using fumadocs' native githubUrl property.

Changes

• Layout config: Added githubUrl property to fumadocs baseOptions(), removed text link from links array
• Homepage: Removed GitHub buttons from hero section and CTA section

// apps/site/lib/layout.shared.tsx
export function baseOptions(): BaseLayoutProps {
  return {
    githubUrl: 'https://github.com/objectstack-ai/objectui',  // Auto-renders as icon
    links: [
      { text: 'Documentation', url: '/docs' },
      { text: 'Storybook', url: 'https://storybook.objectui.org' },
      // GitHub link removed - now handled by githubUrl
    ],
  };
}

Screenshots

Homepage - GitHub icon in navigation (buttons removed)

Docs - GitHub icon in fumadocs sidebar

Original prompt

优化官网GitHub链接的位置，去掉官网首页的链接，在fumadocs layout中显示为图标即可

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Project	Deployment	Review	Updated (UTC)
objectui	Ready	Preview, Comment	Jan 29, 2026 1:14am
objectui-components	Ready	Preview, Comment	Jan 29, 2026 1:14am
objectui-crm-app	Error		Jan 29, 2026 1:14am