fix: update analytics UI to show TradingView indicator versions correctly
- Changed section title: 'Signal Quality Logic Versions' → 'TradingView Indicator Versions'
- Updated current version marker: v3 → v6
- Added version sorting: v6 first, then v5, then unknown
- Updated description to reflect indicator strategy comparison
Context:
- User clarified: V4 display = v6 data, V1 display = v5 data
- Dashboard now shows indicator versions in proper order
- 154 unknown (pre-tracking), 15 v6 (HalfTrend), 4 v5 (Buy/Sell)
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