This skill should be used when the user asks about 'account balance', 'how much USDT do I have', 'my funding account', 'show my positions', 'open positions',...
**Expanded asset snapshot support and simplified documentation.** - Added support for aggregated balance queries: responds to prompts like "asset snapshot", "资产快照", and "aggregated balance". - Introduced and documented new `okx account balance-all` commands for comprehensive account snapshots. - Updated description and command index to reflect new snapshot and asset overview capabilities. - Removed unused documentation file (skill-card.md) for a cleaner repo.