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>

package.json

@@ -0,0 +1,21 @@
+{
+  "name": "blind_chess",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "packageManager": "pnpm@10.33.2",
+  "engines": {
+    "node": ">=22.0.0"
+  },
+  "scripts": {
+    "build": "pnpm -r build",
+    "test": "pnpm -r test",
+    "dev:server": "pnpm --filter @blind-chess/server dev",
+    "dev:client": "pnpm --filter @blind-chess/client dev",
+    "typecheck": "pnpm -r typecheck"
+  },
+  "devDependencies": {
+    "typescript": "^5.6.0",
+    "vitest": "^3.0.0"
+  }
+}