feat: frps-manager v1.0 - frp 0.70.1 multi-tenant web management system

- Multi-tenant client/proxy management with Flask+SQLite
- Frps server control (start/restart/token rotation)
- Generate frpc.ini with shared server token + admin API
- Dashboard API integration (live client/proxy status)
- RBAC: admin/tenant_admin/user roles
- Audit logging for all operations
- Systemd service files included
- Requires legacy INI format (frp 0.70 TOML auth broken)

runtime/frps-manager.service

@@ -0,0 +1,24 @@
+[Unit]
+Description=frps-manager — Flask web UI for managing frps
+Documentation=https://github.com/fatedier/frp
+After=network-online.target frps.service
+Wants=network-online.target
+
+[Service]
+Type=simple
+User=root
+WorkingDirectory=/fs/1000/ftp/Project/frps-manager
+Environment="FRPS_VHOST_HTTP_PORT=80"
+Environment="FRPS_VHOST_HTTPS_PORT=443"
+ExecStart=/fs/1000/ftp/Project/frps-manager/venv/bin/gunicorn \
+  --workers 2 \
+  --bind 0.0.0.0:5390 \
+  --access-logfile /fs/1000/ftp/Project/frps-manager/runtime/logs/web-access.log \
+  --error-logfile /fs/1000/ftp/Project/frps-manager/runtime/logs/web-error.log \
+  --timeout 60 \
+  wsgi:app
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target