fix(hub): archive chart perpetual label and trade row highlight

Label archive K-lines as USDT swap in title and API; highlight the full trade row when opening its chart.

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

hub_ohlcv_lib.py

@@ -67,6 +67,20 @@ def normalize_chart_timeframe(raw: str | None, default: str = "5m") -> str:
     return tf if tf in CHART_TIMEFRAMES else default
 
 
+def normalize_perpetual_symbol(symbol: str) -> str:
+    """BTC/USDT → BTC/USDT:USDT（与四所 ccxt swap 行情一致）。"""
+    sym = (symbol or "").strip().upper()
+    if not sym:
+        return ""
+    if ":" in sym:
+        return sym
+    if "/" in sym:
+        base, quote = sym.split("/", 1)
+        quote_clean = quote.split(":")[0]
+        return f"{base}/{quote_clean}:{quote_clean}"
+    return sym
+
+
 def sync_timeframe_for_display(timeframe: str) -> str:
     """展示周期对应的入库 / 同步周期。"""
     tf = normalize_chart_timeframe(timeframe)