Feature Request: Show selected color preview when right-click cycles color palette

[Arezhik]

Summary

When the user right-clicks to cycle through colors while the overlay is active, briefly display the newly selected color in the top-right corner and fade it out after ~1.5 seconds – similar to the existing thickness feedback.

Proposed Behavior

• Every right-click → cycle to next color in the palette (current behavior)
• Instantly show a visual indicator in the top-right corner:
  • Large filled color swatch (e.g. 80×80 px circle or square)
  • Optional: hex code underneath in smaller text (e.g. #FF5733)
  • Text: “Color: #FF5733” or just the swatch + hex
• Indicator fades in smoothly and disappears after 1.5 seconds of no further right-clicks
• If user right-clicks again before fade-out → update instantly and reset timer

Suggested Style

• Position: same top-right area as the thickness display (stack vertically if both are active OR just update the item in corner to reflect what is being changed)
• Swatch: rounded square/circle with subtle border and drop shadow
• Optional: Also show index value of the color on the user's color palette settings.
• Fade-in/fade-out animation.

Use Cases

• Immediate confirmation of which color was selected (especially with 8+ palette options)
• Prevents “did it actually change?” moments
• Critical when presenting or recording – user always knows current color

Optional Polish

• Play a very subtle click sound on color change
• Add current color preview dot next to the mouse cursor (like many drawing apps); this currently exists but it seems the pointer color is too small to notice unless you are looking at it closely.