v0.0.5

• Redesign onboarding: guide unauthenticated users through login and model selection before the first turn, with a refreshed Prime splash and centered menu surfaces.
• Add a Prime Inference login dialog with browser sign-in and a manual API-key fallback.
• Adapt interactive surfaces and the editor background to the detected terminal colors (dark vs light).
• Make update and package-update alerts compact one-liners that point at prime-agent update.
• Brand the OAuth callback page with the Prime butterfly on a black background.
• Update the Fireworks router model and refresh the Fireworks model catalog.