v0.1.0: Founding builds

The beachhead becomes a battlefield. The first cannons fire, the first drones fall, and progress follows you between deployments.

Added

• Firebase sign-in and cloud save for game progress
• The defense: Cannon and Solar Array defense objects with core weapon mechanics
• The invaders: Suicider Drone, Gnat, Hive Carrier, Tumbler, and Javelin enemies, built on composable enemy traits
• Hive Carriers show progressive hull damage; tumblers land softly on retro rockets
• Bomb mechanics and improved cannon controls
• Backdrops and decor for diverse environments
• Sound effects for gameplay actions, an options page for audio and visual settings, pause, and an SFX audition board on the test page
• Admin controls, game progress management, and settings interface
• Firebase App Hosting configuration for deployment

Under the hood

• Object pooling for projectiles and enemies with spawn management