Force-refresh header balances after transfers and balance SSE events.

Invalidate balance caches on mutation, push SSE balance tick, and bypass 60s cache when refreshing funds.

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

lib/instance/instance_live_push_lib.py

@@ -100,6 +100,11 @@ class InstanceLivePush:
 instance_live_push = InstanceLivePush()
 
 
+def notify_instance_balance_changed() -> int:
+    """划转/兑换后通知 embed 壳拉最新资金快照."""
+    return instance_live_push.tick("balance")
+
+
 def register_instance_live_routes(app: Flask, login_required: Callable) -> None:
     instance_live_push.start()