feat: xterm.js + node-pty architecture for Claude CLI web terminal

Complete rewrite from tmux + JSONL parsing to a clean PTY-based approach.
The proxy spawns Claude CLI in a pseudo-terminal via node-pty and relays
terminal I/O as binary WebSocket frames to the simple-chat backend,
which forwards them to the browser where xterm.js renders a full terminal.

- node-pty PTY manager with 50KB replay buffer per session
- Binary frame protocol with chatId multiplexing
- WebSocket client with auto-reconnection and heartbeat
- Directory listing and session listing for the web UI
- README with setup instructions

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package.json

@@ -0,0 +1,32 @@
+{
+  "name": "claude-cli-proxy",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "start": "tsx src/main.ts",
+    "dev": "tsx watch src/main.ts",
+    "lint": "eslint src/",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "@homebridge/node-pty-prebuilt-multiarch": "^0.13.1",
+    "@xterm/addon-fit": "^0.11.0",
+    "@xterm/addon-web-links": "^0.12.0",
+    "@xterm/xterm": "^6.0.0",
+    "chokidar": "^4.0.0",
+    "dotenv": "^16.4.7",
+    "ws": "^8.18.0"
+  },
+  "devDependencies": {
+    "@types/node": "^22.0.0",
+    "@types/ws": "^8.5.0",
+    "@vigdorov/eslint-config": "^1.0.1",
+    "@vigdorov/prettier-config": "^1.0.0",
+    "@vigdorov/typescript-config": "^1.1.0",
+    "eslint": "^9.39.2",
+    "tsx": "^4.19.0",
+    "typescript": "^5.7.0",
+    "typescript-eslint": "^8.54.0"
+  }
+}