Issue #7: Replace cheap title-bar play/view icons with aligned LED indicators

Implementation Notes

Start with a minimal LED/orb indicator, not a complex icon set.
Audit draw_item_icon, title/header drawing, list row highlight bounds, and grid/title overlays.
Keep dimensions stable so focus highlights do not shift as states change.
Verify readability at RG40XXV 640x480.

Existing cheap play/view icons are removed or no longer used in title/list focus areas.
New LED/orb indicator is visually polished and aligned inside the highlighted region.
Hover/focus/selected/current-playing states are clear.
No text or indicator overlaps at 640x480.