- refactor the /earth HUD into class-first CSS layers with dedicated base, hud, and toolbar responsibilities
- clean up Earth markup and runtime DOM hooks so shared panel, toolbar, tooltip, and status classes stay consistent after dynamic updates
- keep HUD scaling configurable through extracted constants and remove leftover legacy panel/toolbar styling paths
- make planet.sh self-bootstrap Bun and uv by prepending local runtime bins to PATH and auto-installing missing tools in fresh environments
- document Bun as the frontend package manager of record and sync repository version metadata to 0.24.1
- Add isSatelliteFrontFacing() to detect if satellite is on visible side
- Filter satellites in hover and click handlers by front-facing check
- Apply same logic as cables for consistent back-face culling
- Add sizeAttenuation: false to sprite materials for fixed ring size
- Move breathing animation parameters to SATELLITE_CONFIG constants
- Export updateBreathingPhase function to avoid ES module binding issues
- Adjust breathing speed and amplitude for better visual effect
- Calculate orbital period from meanMotion
- Generate predicted orbit points with 10s sampling
- Show complete orbit line when satellite is locked
- Hide orbit when satellite is unlocked
- Color gradient: bright (current) to dark (end)
- Fix TLE epoch format issue with fallback circle orbit
- Add visibility change handler to clear trails on page hide
- Fix satellite count display after loading
- Merge predicted-orbit plan into single file
- Fill unfilled trail points with satellite position instead of (0,0,0)
- Update toggle-satellites button state after auto-show on init
- Remove trailsReady flag since it's no longer needed
