顺势加仓 v2：程序监控滚仓、文档页与平仓同步

重写滚仓计仓与四种加仓方式（市价/斐波/突破），程序盯 mark 触价成交；风险读监控单；pending 可删不可改；手动平仓同步结束滚仓。新增 /strategy/roll/docs 说明页与顺势加仓滚仓说明.md。

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

hub_bridge.py

@@ -791,6 +791,38 @@ def register_hub_routes(app):
         finally:
             conn.close()
 
+    @app.route("/api/hub/roll/sync-flat", methods=["POST"])
+    @_hub_auth_required
+    def api_hub_roll_sync_flat():
+        """中控/实例手动平仓后：取消滚仓 pending 并关闭 active 滚仓组。"""
+        body = request.get_json(silent=True) or {}
+        symbol = (body.get("symbol") or request.form.get("symbol") or "").strip()
+        side = (
+            body.get("side")
+            or body.get("direction")
+            or request.form.get("side")
+            or ""
+        ).strip().lower()
+        if not symbol:
+            return jsonify({"ok": False, "msg": "symbol 不能为空"}), 400
+        if side not in ("long", "short"):
+            return jsonify({"ok": False, "msg": "side 须为 long 或 short"}), 400
+        cfg = current_app.extensions.get("strategy_roll_cfg")
+        get_db = _ctx().get("get_db")
+        if not cfg or not callable(get_db):
+            return jsonify({"ok": False, "msg": "滚仓配置未就绪"}), 500
+        from strategy_register import roll_sync_after_external_close
+
+        conn = get_db()
+        try:
+            out = roll_sync_after_external_close(cfg, conn, symbol, side)
+            conn.commit()
+            return jsonify(out)
+        except Exception as e:
+            return jsonify({"ok": False, "msg": str(e)}), 500
+        finally:
+            conn.close()
+
     @app.route("/api/hub/trend/breakeven/<int:pid>", methods=["POST"])
     @_hub_auth_required
     def api_hub_trend_breakeven(pid):