feat(pages): add AI-powered landing page content generator

Enable automatic landing page content generation using AI:
- Generate hero, features, stats, and CTAs from README
- Blog section configuration in settings UI
- Extract repository metadata for AI context
- Merge generated content while preserving existing settings
- User-friendly generation button in settings panel

options/locale/locale_en-US.json

@@ -4502,6 +4502,16 @@
   "repo.settings.pages.nav_show_repository": "Show Repository link (View Source button)",
   "repo.settings.pages.nav_show_releases": "Show Releases link",
   "repo.settings.pages.nav_show_issues": "Show Issues link",
+  "repo.settings.pages.blog_section": "Blog Section",
+  "repo.settings.pages.blog_enabled_desc": "Show recent blog posts on the landing page",
+  "repo.settings.pages.blog_headline": "Blog Headline",
+  "repo.settings.pages.blog_subheadline": "Blog Subheadline",
+  "repo.settings.pages.blog_max_posts": "Maximum Posts to Show",
+  "repo.settings.pages.ai_generate": "AI Content Generator",
+  "repo.settings.pages.ai_generate_desc": "Automatically generate landing page content (headline, features, stats, CTAs) from your repository's README and metadata using AI.",
+  "repo.settings.pages.ai_generate_button": "Generate Content with AI",
+  "repo.settings.pages.ai_generate_success": "Landing page content has been generated successfully. Review and customize it in the other tabs.",
+  "repo.settings.pages.ai_generate_failed": "Failed to generate content with AI. Please try again later or configure the content manually.",
   "repo.vault": "Vault",
   "repo.vault.secrets": "Secrets",
   "repo.vault.new_secret": "New Secret",