2.18.1 — Mobile scroll horizontal overflow fix (390px) + roadmap sync

[2.18.1] - 2026-10-15

Fixed — Mobile scroll horizontal overflow on docs site (390px)

• Docs site HomeModes horizontal overflow fixed: .wolf-mode cards now declare min-width: 0, matching the .wolf-install-step pattern. Previously, the lack of min-width: 0 on the CSS Grid item caused a grid blowout on mobile viewports (e.g. 390px screen width), resulting in horizontal overflow and failing mobile layout acceptance. Tested and verified on headless Chrome at 390px viewport (scrollWidth === 390). Resolves blocker mem_20260901_sayt_gorizontalnyy_overflow_390px_ot_sek_e443fd.
• Roadmap files synchronized: docs/dev/roadmap/wave-2.18.md is updated to reflect the completed 2.18.0 wave (Council opinions v2, Claim heartbeats, Base sets polish, Docs audit); docs/dev/roadmap/wave-2.19.md is updated to capture Wave 2.19.0 (Async learning); docs/dev/roadmap/wave-2.20.md tracks the candidate Wave 2.20.0 (Archival brief).