fix(deploy): use 5050 for Flask port in install.sh start.sh

install.sh generated a start.sh that hardcoded port 5000 for Flask,
but WebRouter's standard port is 5050 (per start.py defaults and the
rest of the codebase). 5000 is a different project's Flask service.
Align install.sh to 5050 so both start.sh and start.py behave the same.

docs/04-installation.md: drop the now-obsolete port-difference note;
both startup paths use 5050 (Flask) + 5051 (wr-proxy).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: WebRouter

deploy/install.sh

@@ -226,13 +226,13 @@ fi
 echo "启动 WebRouter..."
 cd backend
 DATABASE_URI="${DATABASE_URI:-sqlite:///$PWD/../data/webrouter.db}" \
-nohup python3 -c "from app import create_app; app = create_app(); app.run(host='0.0.0.0', port=5000)" \
+nohup python3 -c "from app import create_app; app = create_app(); app.run(host='0.0.0.0', port=5050)" \
     > ../logs/webrouter.log 2>&1 &
 echo $! > ../logs/webrouter.pid
 
 echo ""
 echo "WebRouter 已启动！"
-echo "  管理后台: http://localhost:5000"
+echo "  管理后台: http://localhost:5050"
 echo "  代理网关: http://localhost:5051"
 echo "  日志目录: $(pwd)/../logs/"
 echo ""
@@ -256,7 +256,7 @@ echo "============================================"
 echo "  安装完成！"
 echo "============================================"
 echo ""
-echo "  管理后台:  http://localhost:5000"
+echo "  管理后台:  http://localhost:5050"
 echo "  代理网关:  http://localhost:5051"
 echo "  安装目录:  $INSTALL_DIR"
 echo "  配置文件:  $INSTALL_DIR/.env"

docs/04-installation.md

@@ -255,7 +255,7 @@ python3 backend/start.py logs      # 查看日志
 - 端口占用检测和启动失败诊断
 - 支持 `WEBROUTER_PORT` / `WR_PROXY_PORT` 环境变量自定义端口
 
-> ⚠️ **端口差异说明：** `install.sh` 生成的简化 `start.sh` 默认用 **5000** 端口启动 Flask（硬编码）。`start.py` 默认用 **5050**。如果用 `start.sh` 启动，访问 `http://localhost:5000`；用 `start.py` 启动，访问 `http://localhost:5050`。生产环境推荐 `start.py`。
+> 两种启动方式的端口一致：**5050**（Flask 管理后台）+ **5051**（wr-proxy 网关）。生产环境推荐 `start.py`，因为它统一管理三个进程并提供启动诊断。
 
 ### 自定义端口