Rebrand product and enhance tradable symbols table with spec columns and K-line links.

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

vnpy_bridge.py

@@ -963,6 +963,33 @@ class CtpBridge:
             logger.debug("estimate_margin_one_lot %s: %s", ths_code, exc)
             return None
 
+    def lookup_contract_spec(self, ths_code: str) -> Optional[dict]:
+        """从 CTP 合约信息读取乘数与最小变动价位。"""
+        if not self._engine:
+            return None
+        try:
+            sym, ex_name = ths_to_vnpy_symbol(ths_code)
+            exchange = to_vnpy_exchange(ex_name)
+            vt_symbol = f"{sym}.{exchange.value}"
+            contract = self._engine.get_contract(vt_symbol)
+            if not contract:
+                return None
+            mult = float(getattr(contract, "size", 0) or 0)
+            tick = float(
+                getattr(contract, "pricetick", 0)
+                or getattr(contract, "price_tick", 0)
+                or 0
+            )
+            if mult <= 0:
+                return None
+            out: dict[str, Any] = {"mult": mult}
+            if tick > 0:
+                out["tick_size"] = tick
+            return out
+        except Exception as exc:
+            logger.debug("lookup_contract_spec %s: %s", ths_code, exc)
+            return None
+
     def _collect_positions(self) -> list[dict[str, Any]]:
         if not self._engine:
             return []
@@ -1420,6 +1447,17 @@ def ctp_estimate_margin_one_lot(mode: str, ths_code: str, price: float) -> Optio
         return None
 
 
+def ctp_lookup_contract_spec(mode: str, ths_code: str) -> Optional[dict]:
+    b = get_bridge()
+    if b.connected_mode != mode or not b.ping():
+        return None
+    try:
+        return b.lookup_contract_spec(ths_code)
+    except Exception as exc:
+        logger.debug("ctp_lookup_contract_spec: %s", exc)
+        return None
+
+
 def get_ctp_balance(mode: str) -> Optional[float]:
     try:
         acc = ctp_get_account(mode)