feat: Enhance Point Modal with Statistical Metrics and Visual Insights

[ad1tyayadav]

Fixes #57

Enhanced the calibration Point Modal with statistical metrics and visual elements, providing users with deeper insights into eye tracking calibration quality.

Before

Screen.Recording.2026-01-04.153644.mp4

After

Screen.Recording.2026-01-04.153827.mp4

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Solved

Added some new statistical metrics and a visual scatter plot to provide comprehensive calibration insights:

New Statistical Metrics

• Total Sample Count - Number of prediction samples captured per point
• Threshold Statistics - Count and percentage of samples within accuracy threshold
• Centroid Offset - Distance between target point and average of accepted predictions
• Distance Range - Min/max prediction distances from calibration point

Visual Enhancements

• Color-Coded Indicators - Green/orange/red circles for at-a-glance quality assessment
• Progress Bar - Visual representation of threshold percentage with color coding
• Status Badge - Blue "SELECTED" chip when point is selected for recalibration
• Scatter Plot Visualization - 200x200px canvas showing:
  • Grid background for spatial reference
  • Dashed threshold circle showing acceptance radius
  • Color-coded prediction points (orange = within, blue = outside threshold)
  • Green centroid marker
  • Black target crosshair
  • Compact legend