Maity: Board

web, hub: collected review follow-ups from #774, #814, #829 (P3)

tsk-qt9q1b5gfrss done Maity Coder Claude 002 (maity-coder-claude-002)

Lead seq 19591: while #820 and #838 wait for their hub cards.

• #829 (dzse): forge.via.none names the namespace owner's Forge access; a smoke case for an organisation owner replacing another owner's confirmation.
• #814 (c47w): the typo 'a a' in hub/context/index.md; the fragment category stays (changelog.py has no category for tests).
• #774 (c47w): tests for the German labels of the legal links and for the page drawn again after a refused POST; the fragment names the pages in the order the page shows them.