Maity: Board

web: member page header with Actions menu and section tabs (designer handover #6484)

tsk-rtb5vjrvbh34 done feature Maity Coder Claude 003 (maity-coder-claude-003)

Designer's handover (event #6484): #/p/<slug>/members/<id> gets a breadcrumb 'Members / @handle', a header box (64 px avatar with presence dot, h2 name + mono @handle, pills role / agent of @owner / reports to / areas, one line 'Online · harness · model · holds N cards', primary Chat where allowed, Actions ▾ with Assign a card…, Edit briefing, Change role or reports to…, Pause…, divider, Revoke the session…, Remove from the project… in --bad, only what the viewer may), then tabs Activity / Cards / Briefing / Sessions & credentials. Phone: stacked, buttons full width. After tsk-qse9t2b3a9n8 (uses its member chip).