Detect 10:15-10:30 morning break in trading session clock.

Split day session into 9:00-10:15 and 10:30-11:30; show 上午休盘 status and countdown to 10:30 reopen.

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

kline_stream.py

@@ -18,6 +18,7 @@ from zoneinfo import ZoneInfo
 
 from kline_chart import fetch_market_klines, ths_to_sina_chart_symbol
 from kline_store import is_cache_fresh, load_meta, ensure_kline_tables
+from market_sessions import is_trading_session
 
 logger = logging.getLogger(__name__)
 TZ = ZoneInfo("Asia/Shanghai")
@@ -27,27 +28,6 @@ FAST_PERIODS = frozenset({
 })
 
 
-def is_trading_session() -> bool:
-    d = datetime.now(TZ)
-    wd = d.weekday()
-    if wd == 6:
-        return False
-    if wd == 5 and d.hour < 21:
-        return False
-    t = d.hour * 60 + d.minute
-    def in_range(sh: int, sm: int, eh: int, em: int) -> bool:
-        return t >= sh * 60 + sm and t < eh * 60 + em
-    if in_range(9, 0, 11, 30):
-        return True
-    if in_range(13, 30, 15, 0):
-        return True
-    if in_range(21, 0, 24, 0):
-        return True
-    if in_range(0, 0, 2, 30):
-        return True
-    return False
-
-
 def sse_format(event: str, data: dict) -> str:
     return f"event: {event}\ndata: {json.dumps(data, ensure_ascii=False)}\n\n"