M3 asks a vertical toolbar for a 24dp margin from the window edge where a
horizontal one keeps 16, and its standard-toolbar colour list ends "Standard
button (Primary)" — the vibrant row of the same list was already honoured, so
the two were being read inconsistently. Both rules are unlayered, because an
icon button's ink is a utility.
Plan: docs/plans/material-3-alignment.md, step 21 (navigation N-12, N-13).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9
