Design for SilverMetal Windows first-boot: declarative branding build
(4 layers baked offline into the WIM, shared dual-mode module), hardened
onboarding kiosk (Shell Launcher v2 + Keyboard Filter for the one-time
sm-bootstrap session), and the Hybrid fullscreen glass-card presentation
for the Welcome app. Fills the empty Invoke-Brand stub (M4 branding).
Approved in brainstorming. Next: writing-plans.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>