M2.3 + M2.4 + TeamManager integration: projectile sprites, death handling, build menu, production panel, building placer
- ProjectileSprite.js: physics arcade sprite, faction tint, off-screen culling
- CombatSystem: refactored enemy selection to use TeamManager instead of legacy containers
- Death handling: DYING alpha tween (500ms), smoke puff (300ms), unit:killed event, cleanup
- TeamManager: centralized team registry replacing goodGuys/badGuys containers
- HealthBarSystem, ResourceBar, CaptureProgressUI, BuildMenu, BuildingPlacer, BuildingRenderer, ProductionPanel
- Map_Player: wired new subsystems, removed legacy container creation
- Tests: ProjectileSprite (4), DeathHandling (13), CombatSystem updated
47 tests passed at dev time (M2.3), 158/158 at dev time (M2.4)
kaykayyali
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