Implementation notes

• Redraw only when state changes.
• Avoid continuous animation in static menus.
• Pre-scale album art.
• Cache small thumbnails.
• Prefer pre-darkened background images over runtime blur.
• Keep glow to the single focused element.
• One sans-serif family is enough for this concept.
• Suggested fonts: Inter, Noto Sans, DejaVu Sans. Font files are not bundled.
• The sample artwork is for prototyping only; use real embedded cover art at runtime.