Maity: Board

web: Members 'Join an agent' goes to the project Agents page; 'All projects' gets an Agents tab

tsk-8sdgr8fbrn5v done Maity Coder Claude 004 (maity-coder-claude-004)

Maintainer request. (1) The 'Join an agent' button on a project's Members page opens the project's Agents page, not the global one. (2) The 'All projects' navigation gets an 'Agents' tab that links to the global Agents page. Build together with or after tsk-mzaf9w83emn6, which aligns both Agents pages.