fix(hub): align Binance chart ticks and improve monitor mark price

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

hub_kline_store.py

@@ -15,6 +15,8 @@ from hub_ohlcv_lib import (
     format_price_by_tick,
     last_closed_bar_open_ms,
     normalize_chart_timeframe,
+    normalize_price_tick,
+    round_ohlcv_bars_to_tick,
     window_start_ms,
 )
 
@@ -73,6 +75,72 @@ def init_db(db_path: Path | None = None) -> None:
             ON ohlcv_bars (exchange_key, symbol, timeframe, open_time_ms)
             """
         )
+        conn.execute(
+            """
+            CREATE TABLE IF NOT EXISTS ohlcv_symbol_meta (
+                exchange_key TEXT NOT NULL,
+                symbol TEXT NOT NULL,
+                price_tick REAL,
+                updated_at INTEGER NOT NULL,
+                PRIMARY KEY (exchange_key, symbol)
+            )
+            """
+        )
+    finally:
+        conn.close()
+
+
+def save_symbol_price_tick(
+    exchange_key: str,
+    symbol: str,
+    price_tick: float | None,
+    db_path: Path | None = None,
+) -> None:
+    tick = price_tick
+    if tick is None:
+        return
+    try:
+        t = float(tick)
+    except (TypeError, ValueError):
+        return
+    if t <= 0:
+        return
+    ex_k = (exchange_key or "").strip().lower()
+    sym = (symbol or "").strip().upper()
+    conn = _connect(db_path)
+    try:
+        conn.execute(
+            """
+            INSERT INTO ohlcv_symbol_meta (exchange_key, symbol, price_tick, updated_at)
+            VALUES (?,?,?,?)
+            ON CONFLICT(exchange_key, symbol) DO UPDATE SET
+                price_tick=excluded.price_tick,
+                updated_at=excluded.updated_at
+            """,
+            (ex_k, sym, t, int(time.time())),
+        )
+    finally:
+        conn.close()
+
+
+def load_symbol_price_tick(
+    exchange_key: str,
+    symbol: str,
+    db_path: Path | None = None,
+) -> float | None:
+    ex_k = (exchange_key or "").strip().lower()
+    sym = (symbol or "").strip().upper()
+    conn = _connect(db_path)
+    try:
+        row = conn.execute(
+            "SELECT price_tick FROM ohlcv_symbol_meta WHERE exchange_key=? AND symbol=?",
+            (ex_k, sym),
+        ).fetchone()
+        if not row or row["price_tick"] is None:
+            return None
+        return float(row["price_tick"])
+    except (TypeError, ValueError):
+        return None
     finally:
         conn.close()
 
@@ -273,6 +341,8 @@ def resolve_chart_bars(
         if remote.get("ok") and remote.get("bars"):
             fetched = upsert_bars(ex_k, sym, tf, remote["bars"], db_path)
             price_tick = remote.get("price_tick")
+            if price_tick is not None:
+                save_symbol_price_tick(ex_k, sym, price_tick, db_path)
             db_rows = load_bars_range(ex_k, sym, tf, fetch_start_ms, now_ms, db_path)
         else:
             remote_err = remote.get("msg") or remote.get("error") or "实例拉取 K 线失败"
@@ -282,6 +352,8 @@ def resolve_chart_bars(
     if len(db_rows) > need:
         db_rows = db_rows[-need:]
 
+    if price_tick is None:
+        price_tick = load_symbol_price_tick(ex_k, sym, db_path)
     if price_tick is None:
         try:
             tick_probe = remote_fetch(
@@ -292,9 +364,15 @@ def resolve_chart_bars(
             )
             if tick_probe.get("ok"):
                 price_tick = tick_probe.get("price_tick")
+                if price_tick is not None:
+                    save_symbol_price_tick(ex_k, sym, price_tick, db_path)
         except Exception:
             pass
 
+    price_tick = normalize_price_tick(price_tick)
+    if db_rows and price_tick is not None:
+        round_ohlcv_bars_to_tick(db_rows, price_tick)
+
     candles = _to_chart_candles(db_rows)
     if not candles:
         return {"ok": False, "msg": remote_err or "无 K 线数据", "purged": purged}