docs(plan): network attention display review round 1
- Simplify LumeCard: remove useState/onClick/tap-toggle entirely.
Mobile: detail always visible (CSS base). Desktop (sm+): hidden,
revealed on group-hover. Pure CSS, no JS state, no 'use client'.
- Fix confused responsive CSS: base classes now show the detail,
sm: classes hide it, sm:group-hover: reveals it.
- Remove the click/Link conflict (no onClick handler at all).
- Update spec §4.2 to match: flow-based expansion instead of
absolute positioning, explicit mobile/desktop behavior.