Add missing changelog entries to content/pages/changelog-page.md:
v1.34.0 (2025-12-26): Blog page featured layout with hero post
- blogFeatured frontmatter field for posts
- Hero card displays first featured post with landscape image
- 2-column featured row for remaining featured posts
- 3-column grid for regular posts
v1.35.0 (2025-12-26): Image support at top of posts and pages
- showImageAtTop frontmatter field
- Full-width image display above post header
- Works for both posts and pages
v1.36.0 (2025-12-27): Social footer component
- Customizable social links (8 platform types)
- Copyright with auto-updating year
- showSocialFooter frontmatter field for per-page control
- Configurable via siteConfig.socialFooter
v1.37.0 (2025-12-27): Newsletter Admin UI
- Three-column admin interface at /newsletter-admin
- Subscriber management with search and filters
- Send newsletter panel (post selection or custom email)
- Weekly digest automation (Sunday 9am UTC)
- Developer notifications (subscriber alerts, weekly stats)
- Markdown-to-HTML conversion for custom emails
- Add 10-second dedup window to heartbeat mutation for idempotency
- Add frontend debouncing (5s) with refs to prevent duplicate calls
- Track pending heartbeat state to block overlapping async calls
- Early return when session already updated with same path
Backend (convex/stats.ts):
- Add HEARTBEAT_DEDUP_MS constant (10 seconds)
- Check if session was recently updated before patching
Frontend (src/hooks/usePageTracking.ts):
- Add isHeartbeatPending, lastHeartbeatTime, lastHeartbeatPath refs
- Wrap sendHeartbeat in useCallback with debounce logic
- Import useCallback from React
Fixes write conflict retries shown in Convex dashboard for stats:heartbeat
Update version to 1.0.0 across package.json and changelog. Configure netlify.toml with Convex deployment URL (agreeable-trout-200.convex.site). Verify TypeScript type-safety for src and convex directories. Confirm Netlify build passes with SPA 404 fallback configured. Update TASK.md with deployment steps and files.md with complete file structure.
