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>

packages/client/src/app.css

@@ -0,0 +1,64 @@
+:root {
+  color-scheme: dark;
+  --bg: #0c0d10;
+  --panel: #15171c;
+  --panel-2: #1d2027;
+  --border: #2a2e38;
+  --text: #e8e8ea;
+  --text-dim: #8d92a0;
+  --accent: #d35400;
+  --accent-dim: #8a3a09;
+  --light: #d8c8a8;
+  --dark: #6b4f3a;
+  --highlight: rgba(74, 222, 128, 0.55);
+  --highlight-cap: rgba(248, 113, 113, 0.65);
+  --armed: rgba(211, 84, 0, 0.55);
+  --touched: rgba(211, 84, 0, 0.85);
+  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
+}
+
+* { box-sizing: border-box; }
+
+html, body, #app { margin: 0; padding: 0; height: 100%; background: var(--bg); color: var(--text); }
+
+body {
+  -webkit-font-smoothing: antialiased;
+  -webkit-tap-highlight-color: transparent;
+}
+
+button {
+  font-family: inherit;
+  font-size: inherit;
+  background: var(--panel-2);
+  color: var(--text);
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  padding: 8px 14px;
+  cursor: pointer;
+  transition: background 0.15s, border-color 0.15s;
+}
+button:hover:not(:disabled) { background: #252932; border-color: var(--accent); }
+button:disabled { opacity: 0.5; cursor: not-allowed; }
+button.primary {
+  background: var(--accent);
+  border-color: var(--accent);
+  color: white;
+  font-weight: 600;
+}
+button.primary:hover { background: #e2671f; border-color: #e2671f; }
+
+input, select {
+  font-family: inherit;
+  font-size: inherit;
+  background: var(--panel-2);
+  color: var(--text);
+  border: 1px solid var(--border);
+  border-radius: 6px;
+  padding: 8px 10px;
+}
+
+a { color: var(--accent); text-decoration: none; }
+a:hover { text-decoration: underline; }
+
+.muted { color: var(--text-dim); }
+.mono { font-family: ui-monospace, SFMono-Regular, monospace; }