feat(strategy): WeChat notify on trend and roll plan start/end

Add shared strategy_wechat_notify helpers; hook trend execute/finalize and roll group open/close across four exchanges and Gate bot.

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

crypto_monitor_gate_bot/app.py

@@ -4604,6 +4604,23 @@ def _trend_finalize_plan(conn, row, result_label, exit_price, closed_at=None):
     if not getattr(cur, "rowcount", 0):
         return
     conn.commit()
+    try:
+        from strategy_trend_register import build_trend_config
+        from strategy_wechat_notify import notify_trend_plan_ended
+
+        _tcfg = build_trend_config(sys.modules[__name__])
+        notify_trend_plan_ended(
+            _tcfg,
+            plan_id=plan_id,
+            symbol=sym,
+            direction=direction,
+            end_type=result_label,
+            result_label=res,
+            exit_price=float(exit_price) if exit_price is not None else None,
+            pnl_amount=float(pnl_amount) if pnl_amount is not None else None,
+        )
+    except Exception:
+        pass
     try:
         cfg = app.extensions.get("strategy_trend_cfg") or {}
         closed = conn.execute(
@@ -6624,6 +6641,28 @@ def execute_trend_pullback():
     )
     conn.execute("DELETE FROM trend_pullback_previews WHERE id=?", (pid,))
     conn.commit()
+    try:
+        from strategy_trend_register import build_trend_config
+        from strategy_wechat_notify import notify_trend_plan_started
+
+        _tcfg = build_trend_config(sys.modules[__name__])
+        notify_trend_plan_started(
+            _tcfg,
+            plan_id=new_plan_id,
+            symbol=symbol,
+            direction=direction,
+            leverage=leverage,
+            stop_loss=stop_loss,
+            take_profit=take_profit,
+            add_upper=add_upper,
+            risk_percent=risk_percent,
+            dca_legs=n_legs,
+            first_order_amount=first_amt,
+            avg_entry=fill1,
+            snapshot_usdt=snap,
+        )
+    except Exception:
+        pass
     conn.close()
     flash(
         f"趋势回调已执行：可用余额（执行时）{round(snap, 2)}U；计划保证金约 {round(margin_plan, 2)}U；"