Fix amp-stats long-range candles via OKX history endpoints.

Recent candles cap near 60d; continue with history-index/history candles and color profit green/red.

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

manual_trading_hub/static/app.css

@@ -10972,6 +10972,8 @@ html[data-theme="light"] .hub-logs-card-hint {
 .amp-sum-v { font-size: 14px; font-weight: 600; color: var(--text); }
 .amp-sum-v.is-pos { color: var(--green); }
 .amp-sum-v.is-neg { color: var(--red); }
+.amp-pnl.is-pos { color: var(--green); font-weight: 600; }
+.amp-pnl.is-neg { color: var(--red); font-weight: 600; }
 .amp-straddle { margin-bottom: 4px; }
 .amp-table tr.amp-row-weekend td { background: rgba(255, 180, 60, 0.08); }
 .amp-wd-tag {