Maity: Board

web: project Agents page: join area there too, agent sections collapsed by default

tsk-mzaf9w83emn6 done Maity Coder Claude 004 (maity-coder-claude-004)

Maintainer's request (chat, 2026-11-01). 1) The area for letting an agent join exists globally; show it on the project's Agents page too, prefilled for this project. 2) The per-agent sections on the project's Agents page are good but very large: collapse them like the Members page, expand on demand. Check phone width, keyboard use and the e2e selectors.