build 0.2.12 — Once Upon The Universe Steam update #1329001

Improved the first planet tutorial step: the normalized 1 Msun / 1 Mearth training system now receives a one-time Star Barrier protection so loose particles cannot disrupt tutorial progress. Improved empty planet building slots hover feedback, including both the placeholder tile area and the Empty level bar. Added dedicated product-colored names to factory tooltips, making Alloys, Machines, Weapons, Artifacts, and Consumer Goods factories easier to identify visually. Added pixelart graphic for Observatory building.