Changes:
1. UTC+1 Time Display
- Updated formatDate() to add 1 hour offset for Central European Time (UTC+1)
- Added timeFormatter to chart timeScale for x-axis labels
- Both signal display and chart time axis now show UTC+1 time
2. Fix Indicator Redrawing
- Added missing getActiveIndicators() call in drawIndicatorsOnChart
- Fixed variable scope issue where activeIndicators wasn't defined
- Ensures indicators are properly removed and recreated when new candles close
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