chore: initial project scaffold with Fastify server and Vite React app

Set up monorepo structure with server/ (Fastify + TypeScript) and web/ (React + Vite + TypeScript).
Includes package configs, dev proxy setup, and mobile-first CSS foundation.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,10 @@
+node_modules/
+dist/
+data/
+*.sqlite
+*.sqlite-journal
+*.sqlite-wal
+*.sqlite-shm
+.env
+*.pdf
+web-dist/