Remove 12h timeframe and stabilize chart wheel zoom.

Drop 12h from market chart options and storage, and avoid left-pan reload and tail refresh from resetting the viewport while zooming.

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

hub_ohlcv_lib.py

@@ -15,7 +15,6 @@ CHART_TIMEFRAMES = frozenset(
         "1h",
         "2h",
         "4h",
-        "12h",
         "1d",
         "1w",
     }
@@ -27,15 +26,14 @@ CHART_TIMEFRAME_ORDER = (
     "1h",
     "2h",
     "4h",
-    "12h",
     "1d",
     "1w",
 )
 DAILY_PLUS_TIMEFRAMES = frozenset({"1d", "1w"})
 
 # 入库 / 同步真源（交易所拉取）
-STORED_TIMEFRAMES = frozenset({"1m", "5m", "1h", "12h", "1d", "1w"})
-PERMANENT_STORED_TIMEFRAMES = frozenset({"12h", "1d", "1w"})
+STORED_TIMEFRAMES = frozenset({"1m", "5m", "1h", "1d", "1w"})
+PERMANENT_STORED_TIMEFRAMES = frozenset({"1d", "1w"})
 YEAR_ROLLING_STORED = frozenset({"5m", "1h"})
 
 # 展示周期 → 本地聚合源（不落库）
@@ -52,10 +50,8 @@ HUB_KLINE_1M_MAX_BARS = max(1000, int(os.getenv("HUB_KLINE_1M_MAX_BARS", "10000"
 HUB_KLINE_5M_1H_RETENTION_DAYS = max(30, int(os.getenv("HUB_KLINE_5M_1H_RETENTION_DAYS", "365")))
 HUB_KLINE_SEED_BARS = max(100, int(os.getenv("HUB_KLINE_SEED_BARS", "500")))
 
-# 部分交易所 ccxt 无原生 12h，或原生 K 线间隔异常时从 1h 聚合（仅远程拉取 fallback）
-OHLCV_AGGREGATE_FROM: dict[str, str] = {
-    "12h": "1h",
-}
+# 交易所无原生周期时的远程拉取 fallback（行情区当前无映射）
+OHLCV_AGGREGATE_FROM: dict[str, str] = {}
 
 TIMEFRAME_MS: dict[str, int] = {
     "1m": 60_000,
@@ -126,7 +122,7 @@ def bar_limit_for_timeframe(timeframe: str) -> int:
 
 
 def storage_retention_days(storage_tf: str) -> int | None:
-    """None 表示不按天截断（1m 按根数；12h/1d/1w 永久）。"""
+    """None 表示不按天截断（1m 按根数；1d/1w 永久）。"""
     tf = normalize_chart_timeframe(storage_tf)
     if tf in YEAR_ROLLING_STORED:
         return HUB_KLINE_5M_1H_RETENTION_DAYS
@@ -159,7 +155,6 @@ def retention_policy_meta() -> dict[str, Any]:
         "1m": {"mode": "bars", "max_bars": HUB_KLINE_1M_MAX_BARS},
         "5m": {"mode": "days", "days": HUB_KLINE_5M_1H_RETENTION_DAYS},
         "1h": {"mode": "days", "days": HUB_KLINE_5M_1H_RETENTION_DAYS},
-        "12h": {"mode": "permanent"},
         "1d": {"mode": "permanent"},
         "1w": {"mode": "permanent"},
         "aggregate_from": dict(CHART_DISPLAY_AGGREGATE_FROM),