Show open-capacity labels, enlarge funds, move rules; WeCom on short funds.

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

backend/app/strategy/engine.py

@@ -17,6 +17,7 @@ from ..env_store import live_ready
 from .clock import can_open_new, window_key
 from .exits import check_expiry_close, check_exits, resolve_exit_target
 from .group import next_group_id
+from .open_capacity import assess_open_capacity, maybe_notify_funds_short
 
 logger = logging.getLogger(__name__)
 
@@ -101,6 +102,23 @@ class StrategyEngine:
             self._set_state(last_error=None)
             last_error = None
         allow_open = can_open_new(skip_weekends=skip_weekends)
+        try:
+            open_cap = assess_open_capacity(self.db)
+        except Exception:
+            logger.exception("assess_open_capacity failed")
+            open_cap = {
+                "perp_can_open": None,
+                "option_can_open": None,
+                "perp_label": f"永续{int(round(leverage))}x —",
+                "option_label": "期权 —",
+                "funds_ok": False,
+                "leverage": leverage,
+            }
+        if open_cap.get("perp_can_open") is False or open_cap.get("option_can_open") is False:
+            try:
+                maybe_notify_funds_short(open_cap)
+            except Exception:
+                pass
         return {
             "running": bool(row["running"]),
             "phase": row["phase"],
@@ -120,6 +138,7 @@ class StrategyEngine:
             "atm_open_offset_enabled": atm_off_on,
             "max_atm_open_offset": max_atm_off,
             "can_open": allow_open,
+            "open_capacity": open_cap,
             "last_error": last_error,
             "position": upl,
             "residuals": self.matcher.list_residual_options(pending_only=True),
@@ -593,6 +612,22 @@ class StrategyEngine:
             self._set_state(phase="open", last_error="有未平仓，禁止开下一组")
             return
 
+        try:
+            cap = assess_open_capacity(self.db)
+            if cap.get("perp_can_open") is False or cap.get("option_can_open") is False:
+                detail = (
+                    f"{cap.get('perp_label')} · {cap.get('option_label')}；"
+                    f"永续需≈{cap.get('perp_need_usdt')}U/有{cap.get('perp_have_usdt')}U，"
+                    f"期权需≈{cap.get('option_need_usdc')}U/有{cap.get('option_have_usdc')}U"
+                )
+                self._set_state(phase="wait_funds", last_error=f"资金不足，暂不可开新仓：{detail}")
+                maybe_notify_funds_short(cap)
+                return
+            if st["phase"] == "wait_funds":
+                self._set_state(phase="idle", last_error=None)
+        except Exception:
+            logger.exception("open capacity gate failed")
+
         self._set_state(phase="wait_signal")
         pick = await get_session().pick_for_open_async()
         if pick is None: