- Add Tempest (Atari 1981 vector arcade clone) with full simulation logic,
Phaser rendering scene, vector font, and headless verification suite
- Register Tempest in games registry, main scene list, and game room dispatch
- Add reusable Tooltip UI component for hover-based information display
- Add Civilization unit/building tooltips in city screen and map hover
(CivilizationTooltips.js with flag and effect descriptions)
- Update Civilization click handling to distinguish hover-only from real
click targets via hoverOnly data flag
- Update civilization-units and game-icons assets
