feat(risk): show live countdown on freeze status badges

Expose freeze_until_ms from risk API and tick hub/instance badges with remaining 1h/4h/daily time.

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

account_risk_lib.py

@@ -405,6 +405,44 @@ def apply_manual_close_journal_cooloff(
     )
 
 
+def _next_trading_day_reset_ms(now: datetime, reset_hour: int) -> int:
+    from datetime import timedelta
+
+    h = max(0, min(23, int(reset_hour)))
+    candidate = now.replace(hour=h, minute=0, second=0, microsecond=0)
+    if now >= candidate:
+        candidate = candidate + timedelta(days=1)
+    return _now_ms(candidate)
+
+
+def enrich_risk_status_countdown(
+    st: dict[str, Any],
+    *,
+    now: Optional[datetime] = None,
+    daily_reset_hour: int = 8,
+) -> dict[str, Any]:
+    """补充 freeze_until_ms / freeze_remaining_sec，供前端倒计时展示。"""
+    if not st.get("enabled", True):
+        return st
+    dt = now or datetime.now()
+    now_ms = _now_ms(dt)
+    until_ms: Optional[int] = None
+    if st.get("daily_frozen"):
+        until_ms = _next_trading_day_reset_ms(dt, daily_reset_hour)
+    elif st.get("cooloff_until_ms"):
+        try:
+            until_ms = int(st["cooloff_until_ms"])
+        except (TypeError, ValueError):
+            until_ms = None
+    if until_ms is not None and until_ms > now_ms:
+        st["freeze_until_ms"] = until_ms
+        st["freeze_remaining_sec"] = max(0, (until_ms - now_ms) // 1000)
+    else:
+        st["freeze_until_ms"] = None
+        st["freeze_remaining_sec"] = 0
+    return st
+
+
 def compute_account_risk_status(
     conn,
     *,