- New `js/galaxy/PlanetClasses.js` deals non-home planets from one shared deck so every class lands at ~1/N of the galaxy while star type still flavors local systems
- Config knob `systems.planetClassBalance` (enabled + bias) blends an even split with the star-mix preference; bias 0 = exactly even, 1 = old free preference
- Stamp `galaxy.planetClasses` is read back by content generator, frame pass, economy, and type preview so lazy/eager generation agree
- `rollSystemComposition` accepts optional stamped classes; falls back to per-type weighted draws when balance is off or stamp absent
- Fix arid-surface video path in landing.json (was pointing at ice surface)
- Update shop-ui and trade-scout tests to pick rows the current system actually wants, and handle home-world exit resolution
