feat: implement and deploy blind_chess MVP

- pnpm workspace: shared/server/client packages
- Server: Fastify+ws, chess.js, FSM (touch-move + hierarchy),
  per-player view filter, zod validation, rate limiting, grace-window
  disconnect handling
- Client: Svelte 5 + Vite, click-to-move board, moderator panel,
  promotion/draw dialogs
- Shared: protocol types, ModeratorText enum, geometricMoves helper
  (provably zero opponent-info leak)
- 43 tests pass (21 shared, 22 server incl. 4 real-WS integration)
- Deploy: CT 690 on node-241 (192.168.0.245), systemd-managed,
  Caddy block for chess.sethpc.xyz
- Live at https://chess.sethpc.xyz

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitignore

@@ -8,6 +8,7 @@ dist/
 build/
 .svelte-kit/
 .vite/
+*.tsbuildinfo
 
 # Logs / coverage
 *.log
@@ -26,3 +27,7 @@ coverage/
 
 # Handoff workspace artifacts (kept local)
 .claude/handoffs/*.draft.md
+.deploy-server/
+
+# Local-only symlink to ~/bin/GITEA_API.md
+GITEA_API.md