Removed USD threshold gates. Now any liquidation data triggers scoring:
- ratio ≥ 2.0 → +5 (extreme imbalance)
- ratio ≥ 1.5 → +3
- ratio ≥ 1.2 → +1
- ratio 0.8~1.2 → 0 (balanced)
- Inverse for SHORT direction
- Sidebar: 信号/模拟盘 section headers
- Three paper trade entries: 全部持仓, V5.1模拟盘, V5.2模拟盘 (NEW badge)
- Paper page reads strategy from URL query params
- Suspense boundary for useSearchParams