feat: migrate to CoinAnk API and improve chart UI

- Chart improvements: professional styling, popular symbols quick selection, simplified B/S legend
- Data source migration: use CoinAnk API exclusively for all kline data
- Code cleanup: remove Binance WebSocket cache and related code (websocket_client.go, combined_streams.go, monitor.go)
- Log optimization: reduce hook spam, suppress 404 errors, increase P&L diff threshold
- Lighter integration: add order sync functionality, fix market order precision
- Remove ticker merge logic for simplicity

scripts/restart_and_test.sh

@@ -0,0 +1,65 @@
+#!/bin/bash
+
+echo "=================================="
+echo "NOFX 后端重启和测试脚本"
+echo "=================================="
+
+# 1. 停止旧进程
+echo ""
+echo "1️⃣  停止旧进程..."
+pkill -f "bin/nofx" || echo "  没有运行中的进程"
+sleep 2
+
+# 2. 清理旧数据
+echo ""
+echo "2️⃣  清理测试数据..."
+sqlite3 data/data.db "DELETE FROM trader_fills; DELETE FROM trader_orders;"
+echo "  ✅ trader_orders 和 trader_fills 表已清空"
+
+# 3. 验证数据库已清空
+ORDERS_COUNT=$(sqlite3 data/data.db "SELECT COUNT(*) FROM trader_orders")
+FILLS_COUNT=$(sqlite3 data/data.db "SELECT COUNT(*) FROM trader_fills")
+echo "  验证: trader_orders=$ORDERS_COUNT, trader_fills=$FILLS_COUNT"
+
+# 4. 启动新进程
+echo ""
+echo "3️⃣  启动新编译的后端服务..."
+if [ ! -f "bin/nofx" ]; then
+    echo "  ❌ bin/nofx 不存在，请先运行 go build -o bin/nofx ."
+    exit 1
+fi
+
+nohup ./bin/nofx > data/nofx_$(date +%Y-%m-%d).log 2>&1 &
+NOFX_PID=$!
+echo "  ✅ 后端已启动 (PID: $NOFX_PID)"
+
+# 5. 等待服务启动
+echo ""
+echo "4️⃣  等待服务启动..."
+sleep 3
+
+# 6. 验证进程运行
+if ps -p $NOFX_PID > /dev/null; then
+    echo "  ✅ 后端进程运行正常 (PID: $NOFX_PID)"
+else
+    echo "  ❌ 后端进程启动失败，请检查日志"
+    tail -20 data/nofx_$(date +%Y-%m-%d).log
+    exit 1
+fi
+
+echo ""
+echo "=================================="
+echo "✅ 重启完成！"
+echo "=================================="
+echo ""
+echo "📝 下一步操作："
+echo "  1. 访问前端页面"
+echo "  2. 执行一次平仓操作（手动或AI）"
+echo "  3. 等待 10 秒（让 pollLighterTradeHistory 完成）"
+echo "  4. 检查数据库："
+echo "     sqlite3 data/data.db \"SELECT id, status, avg_fill_price, filled_quantity FROM trader_orders\""
+echo "  5. 刷新图表页面，应该能看到 B/S 标记"
+echo ""
+echo "📊 实时日志查看："
+echo "  tail -f data/nofx_$(date +%Y-%m-%d).log | grep -E 'Order recorded|Found matching trade|Fill recorded'"
+echo ""