The v2 thread surfaces still styled borders, fills, and status text with
dark:/light: pairs, which do not follow registered custom themes and now fail
the no-mobile-uniwind-theme-escape-hatches lint. Convert them to adaptive
tokens, adding the missing amber/sky badge and neutral hairline/fill entries
to the theme generator.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>