修复粉尘桥拦开仓，并继续消除模拟盘嵌套握锁导致的 database is locked。

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

lib/options/options_spot_bridge_lib.py

@@ -514,7 +514,94 @@ def sell_residual_after_option_flat(
     return _apply_bridge(conn_or_get_db)
 
 
-def bridge_blocks_new_open_msg(conn: sqlite3.Connection) -> str | None:
+def clear_dust_pending_sell_bridges(
+    conn_or_get_db: Any,
+    ex: Any | None,
+) -> int:
+    """待卖回桥若交易户只剩粉尘(或已空),关闭桥并返回关闭条数.
+
+    推荐传 get_db:余额查询(模拟盘会另开连接)绝不能套在未关闭的业务连接上。
+    """
+    if ex is None:
+        return 0
+    get_db = conn_or_get_db if callable(conn_or_get_db) else None
+
+    def _pending(c: sqlite3.Connection) -> list[dict[str, Any]]:
+        return [
+            b
+            for b in list_open_bridges(c)
+            if str(b.get("status") or "") == BRIDGE_PENDING_SELL
+        ]
+
+    if get_db is not None:
+        conn = get_db()
+        try:
+            pending = _pending(conn)
+            try:
+                conn.commit()
+            except Exception:
+                pass
+        finally:
+            try:
+                conn.close()
+            except Exception:
+                pass
+    else:
+        conn = conn_or_get_db
+        pending = _pending(conn)
+        try:
+            conn.commit()
+        except Exception:
+            pass
+
+    to_close: list[dict[str, Any]] = []
+    for b in pending:
+        uly = str(b.get("underlying") or "ETH").upper() or "ETH"
+        try:
+            avail = fetch_trading_coin_available(ex, uly)
+        except Exception:
+            continue
+        if avail is None:
+            continue
+        if is_sellable_spot_coin(ex, uly, avail):
+            continue
+        to_close.append(b)
+    if not to_close:
+        return 0
+
+    def _close_all(c: sqlite3.Connection) -> int:
+        n = 0
+        for b in to_close:
+            try:
+                update_bridge(
+                    c,
+                    int(b["id"]),
+                    status=BRIDGE_CLOSED,
+                    message="粉尘低于现货最小可卖,已忽略",
+                    close=True,
+                )
+                n += 1
+            except Exception:
+                pass
+        return n
+
+    if get_db is not None:
+        conn2 = get_db()
+        try:
+            return _close_all(conn2)
+        finally:
+            try:
+                conn2.close()
+            except Exception:
+                pass
+    return _close_all(conn_or_get_db)
+
+
+def bridge_blocks_new_open_msg(
+    conn: sqlite3.Connection,
+    ex: Any | None = None,
+) -> str | None:
+    _ = ex  # 清粉尘请调用方先 clear_dust_pending_sell_bridges(get_db, ex)
     bridges = list_open_bridges(conn)
     if not bridges:
         return None
@@ -528,8 +615,18 @@ def bridge_blocks_new_open_msg(conn: sqlite3.Connection) -> str | None:
     return "存在未完成的币本位资金桥,暂不可开仓"
 
 
-def mode_switch_block_msg(conn: sqlite3.Connection, ex: Any | None = None) -> str | None:
+def mode_switch_block_msg(
+    conn: sqlite3.Connection,
+    ex: Any | None = None,
+    *,
+    get_db: Any | None = None,
+) -> str | None:
     """有单笔期权仓或未完成桥时禁止切换本位."""
+    try:
+        if get_db is not None:
+            clear_dust_pending_sell_bridges(get_db, ex)
+    except Exception:
+        pass
     if has_unfinished_bridge(conn):
         return "存在未完成的币本位资金桥,禁止切换期权本位模式"
     if ex is not None: