fix: 新笔确认即查BSP（反向二类分型触发），首轮也查confirmed[-1]

笔被反向二类分型确认时is_sure=True，不需要等下一笔。
- 跟踪confirmed[-1]变化→查新确认那笔自身的BSP
- 首轮也查confirmed[-1]，避免漏掉监控启动前刚确认的BSP

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

bsp_monitor/main.py

@@ -112,40 +112,38 @@ class BSPMonitor:
         if current_bi_id is None:
             return
 
-        # 5. 首轮：记录状态，不推送
+        # 5. 首轮：记录状态，检查最后一笔的 BSP（可能刚被分型确认）
         if st.first_run:
             st.first_run = False
             st.last_bi_id = current_bi_id
             st.pivot_monitor.update(engine.bi_zs_list)
+
+            bsp = engine.get_bsp_for_bi(last_confirmed)
+            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}")
+
             logger.info(
                 f"[{name}] 首次完成 — {len(confirmed)} 笔, "
-                f"{len(engine.bsp_list)} BSP (不推送)"
+                f"{len(engine.bsp_list)} BSP"
             )
             return
 
-        # 6. 检测新笔确认
+        # 6. 检测新笔确认（反向二类分型触发 is_sure=True）
         if current_bi_id == st.last_bi_id:
             return
 
-        prev_bi_id = st.last_bi_id
         st.last_bi_id = current_bi_id
 
         bi_dir = "⬆️" if last_confirmed.dir == Chan_BI_DIR.UP else "⬇️"
         logger.info(f"[{name}] 新笔确认 — #{len(confirmed)} "
                     f"{bi_dir} 高度: ${last_confirmed.height:.2f}")
 
-        # 7. 找到刚被终结的那笔（上一轮的 confirmed[-1]），检查其终点是否为 BSP
-        prev_bi = None
-        for b in engine.bi_list:
-            if b.is_sure and _bi_id(b) == prev_bi_id:
-                prev_bi = b
-                break
-
-        if prev_bi:
-            bsp = engine.get_bsp_for_bi(prev_bi)
-        else:
-            bsp = None
-
+        # 7. 检查刚被分型确认这笔的终点是否为 BSP
+        bsp = engine.get_bsp_for_bi(last_confirmed)
         if bsp:
                 key = f"{symbol}_{bsp.type}_{bsp.klc.end_time}"
                 msg = engine.format_bsp_detail(bsp, symbol)