refactor: 移除 gate_bot，统一为三所架构并更新文档

删除 crypto_monitor_gate_bot 目录，中控与子代理改为 binance/okx/gate 三账户；
文档与 UI 文案「四所」改为「三所」；新增清库前一次性配置备份脚本。

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

manual_trading_hub/scripts/pm2_restart_agents.sh

@@ -9,18 +9,15 @@ ECO="${HUB_DIR}/ecosystem.config.cjs"
 cd "${HUB_DIR}"
 chmod +x scripts/run_agent.sh scripts/run_hub.sh 2>/dev/null || true
 
-AGENTS=(manual-agent-binance manual-agent-okx manual-agent-gate manual-agent-gate-bot)
+AGENTS=(manual-agent-binance manual-agent-okx manual-agent-gate)
 
 for n in "${AGENTS[@]}"; do
   pm2 delete "${n}" 2>/dev/null || true
 done
 
 pm2 start "${ECO}" --only manual-agent-binance
+pm2 start "${ECO}" --only manual-agent-okx
 pm2 start "${ECO}" --only manual-agent-gate
-pm2 start "${ECO}" --only manual-agent-gate-bot
-
-# OKX 若已 online 可跳过；若也挂了则：
-# pm2 start "${ECO}" --only manual-agent-okx
 
 pm2 save 2>/dev/null || true
-echo "已重建 binance / gate / gate-bot 子代理，请执行: bash scripts/check_agents.sh"
+echo "已重建 binance / okx / gate 子代理，请执行: bash scripts/check_agents.sh"