refactor: BSP检测改为新笔驱动，不再逐tick对比BSP列表

- 用 last_bi_id (start_klc.start_time) 跟踪最后一笔
- 新笔确认时检查上一笔终点是否为 BSP → 推送
- 中枢更新同样在新笔产生时触发
- 移除时间过滤、BSP列表diff、持久化去重等冗余逻辑
- 无新笔时快速跳过，tick从40s降到15s

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

bsp_monitor/main.py

@@ -5,8 +5,8 @@ main.py - 缠论买卖点监控主程序。
 每整分钟：
   1. 从 data_provider 拉取所有币对最新 1m K 线
   2. 每个币对独立跑缠论管线
-  3. 检测新出现的买卖点（BSP）+ 中枢特征变化
-  4. 推送到 Telegram
+  3. 检测新笔 → 检查上一笔终点是否 BSP → 推送
+  4. 检测中枢特征变化 → 推送
 """
 import asyncio
 import logging
@@ -15,6 +15,7 @@ import os
 import time
 from dataclasses import dataclass, field
 from datetime import datetime, timezone, timedelta
+from typing import Optional
 
 sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
 
@@ -39,12 +40,16 @@ def _short(symbol: str) -> str:
     return symbol.split(":")[0].replace("/", "")
 
 
+def _bi_id(bi) -> tuple:
+    """笔的稳定标识，基于首K线时间戳。"""
+    return (bi.start_klc.start_time,)
+
+
 @dataclass
 class SymbolState:
     symbol: str
     pivot_monitor: ChanPivotMonitor = field(default_factory=ChanPivotMonitor)
-    known_bsp_keys: set = field(default_factory=set)
-    last_df_ts: object = None
+    last_bi_id: Optional[tuple] = None  # 上次检查过的最后一笔 ID
     first_run: bool = True
 
 
@@ -80,11 +85,6 @@ class BSPMonitor:
             logger.warning(f"[{name}] DataFrame 为空")
             return
 
-        latest_ts = df.iloc[-1]["timestamp"]
-        if st.last_df_ts and latest_ts <= st.last_df_ts:
-            return  # 无新K线
-        st.last_df_ts = latest_ts
-
         # 2. 运行缠论管线
         try:
             engine = ChanEngine(df)
@@ -92,23 +92,46 @@ class BSPMonitor:
             logger.error(f"[{name}] 缠论计算失败: {e}", exc_info=True)
             return
 
-        # 3. 中枢特征监控 + 推送
-        pivot_state = st.pivot_monitor.update(engine.bi_zs_list)
+        # 3. 获取已确认的笔
+        confirmed = [b for b in engine.bi_list if b.is_sure]
+        if len(confirmed) < 2:
+            return
 
-        # 4. BSP 检测 + 推送
-        current_bsps = engine.bsp_list
-        current_keys = {_bsp_stable_key(b, symbol) for b in current_bsps}
+        last_bi = confirmed[-1]
+        current_bi_id = _bi_id(last_bi)
 
+        # 4. 首轮：记录状态，不推送
         if st.first_run:
             st.first_run = False
-            st.known_bsp_keys = current_keys
-            confirmed = [b for b in engine.bi_list if b.is_sure]
+            st.last_bi_id = current_bi_id
+            st.pivot_monitor.update(engine.bi_zs_list)  # 初始化中枢状态
             logger.info(
                 f"[{name}] 首次完成 — {len(confirmed)} 笔, "
-                f"{len(current_bsps)} BSP (不推送)"
+                f"{len(engine.bsp_list)} BSP (不推送)"
             )
             return
 
+        # 5. 检测新笔
+        if current_bi_id == st.last_bi_id:
+            return  # 无新笔，跳过
+
+        st.last_bi_id = current_bi_id
+        logger.info(f"[{name}] 新笔确认 — #{len(confirmed)} "
+                    f"{'⬆️' if last_bi.dir.value == 1 else '⬇️'} "
+                    f"高度: ${last_bi.height:.2f}")
+
+        # 6. 检查上一笔终点是否为 BSP
+        prev_bi = confirmed[-2]
+        bsp = engine.get_bsp_for_bi(prev_bi)
+        if bsp:
+            key = f"{symbol}_{bsp.type}_{bsp.klc.end_time}"
+            msg = engine.format_bsp_detail(bsp, symbol)
+            msg = _escape_html(msg)
+            if send_bsp_alert(msg, bsp_key=key):
+                logger.info(f"[{name}] ✅ BSP: {key}")
+
+        # 7. 中枢特征更新
+        pivot_state = st.pivot_monitor.update(engine.bi_zs_list)
         if pivot_state:
             logger.info(
                 f"[{name}] 中枢更新: bi_count={pivot_state['bi_count']} "
@@ -117,22 +140,6 @@ class BSPMonitor:
             )
             self._push_pivot(pivot_state, name)
 
-        new_keys = current_keys - st.known_bsp_keys
-        st.known_bsp_keys |= current_keys
-
-        if not new_keys:
-            return
-
-        logger.info(f"[{name}] {len(new_keys)} 个新 BSP")
-        for bsp in current_bsps:
-            key = _bsp_stable_key(bsp, symbol)
-            if key not in new_keys:
-                continue
-            msg = engine.format_bsp_detail(bsp, symbol)
-            msg = _escape_html(msg)
-            if send_bsp_alert(msg, bsp_key=key):
-                logger.info(f"[{name}] ✅ BSP: {key}")
-
     def _push_pivot(self, state: dict, name: str):
         if state["is_sure"]:
             phase = "✅ 已确认"
@@ -197,10 +204,6 @@ class BSPMonitor:
                 await asyncio.sleep(5)
 
 
-def _bsp_stable_key(bsp, symbol: str) -> str:
-    return f"{symbol}_{bsp.type}_{bsp.klc.end_time}"
-
-
 def _escape_html(msg: str) -> str:
     """HTML 转义，保留已有的 <b>/<code> 标签。"""
     msg = msg.replace("&", "&amp;")