统一 Docker Compose 部署，并将客户端拆分为独立子项目。

移除宿主机/conda 启动脚本与 dev 联调工具，后端仅通过 docker compose 部署并默认启用 GPU。模拟客户端与语音确认页迁入 clients/ 下自包含目录，切断对后端源码路径的依赖。

Co-authored-by: Cursor <cursoragent@cursor.com>

clients/demo-client/start.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+# Start the standalone demo client page for LAN access.
+# Backend must be running first: docker compose up -d --build (in repo root)
+# Usage: ./start.sh [port]
+
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+cd "$ROOT"
+
+PORT="${1:-${DEMO_PORT:-38081}}"
+HOST="${DEMO_HOST:-0.0.0.0}"
+API_PORT="${API_PORT:-38080}"
+
+LAN_IP="$(python3 - <<'PY'
+import socket
+
+s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+try:
+    s.connect(("8.8.8.8", 80))
+    print(s.getsockname()[0])
+except OSError:
+    print("")
+finally:
+    s.close()
+PY
+)"
+
+echo "Demo client listening on ${HOST}:${PORT}"
+echo "Local: http://127.0.0.1:${PORT}/"
+if [[ -n "${LAN_IP}" && ( "${HOST}" == "0.0.0.0" || "${HOST}" == "::" ) ]]; then
+  echo "LAN:   http://${LAN_IP}:${PORT}/"
+  echo "Base URL: http://${LAN_IP}:${API_PORT}"
+fi
+
+exec python3 server.py --host "$HOST" -p "$PORT"