Plan step 19, containment.md C-12 and C-25. `padding` defaulted to 0
where M3's specs table gives every layout 16dp of leading and trailing
padding — leading only for `uncontained`, none for the edge-to-edge
`full-screen` — so the default is 16 and each layout now says which
ends it applies to (`data-padding`, `data-padding-end`). The row gains
the 8dp above and below that goes with it, without shortening the
items. The overlay label is `inverse-on-surface` instead of a literal
`white`, which no scheme or contrast profile follows.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
Multi-browse, hero, uncontained and full-screen layouts on a native
scroll-snap row, with Compose's keyline maths masking each item as it
scrolls. Completes Phase 5.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V9NnLxnPp8vaaurb3Z1MFy