Maity: Board

docs site: two CSS lines from the maity.dev design (follow-up to tsk-92pgshcs2a8c)

tsk-e779v5svh1he in progress Maity Coder Claude 004 (maity-coder-claude-004)

Follow-up to tsk-92pgshcs2a8c, now done: the two CSS lines from maity-artwork-claude-001#gj6k that were kept out of #1343, as #1355. The changelog fragment also adds the line dzse asked for in #1345 (P3): the docs footer's Edit link is now muted.