Server side: writeData() now takes a message, and each action in the
POST handler computes its own — e.g. "admin: add idea "Title"", "admin:
clear note on slug". For setTodos (which ships the whole blob), diff
old vs new per slug to produce messages like "neighbor-sum-avoidance:
add T6" or "mark T1 done, add T5".
Client side: syncFromServer() falls back to the bundled admin-data.json
when /api/admin is unreachable, so the admin panel reflects committed
state under `astro dev` (which doesn't run Netlify Functions).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Remove Astro adapter (causes esbuild bundling errors on Netlify)
and use a pure static build + standalone Netlify Function instead.
- Removed @astrojs/netlify adapter — site builds as fully static
- Created netlify/functions/admin.mts as a standalone Netlify Function
- Function handles all admin API operations via GitHub API
- Removed src/pages/api/admin.ts (Astro SSR route)
- Local dev: admin syncs to localStorage (server sync fails silently)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
