Alerts, Metrics, Params, and Dashboards now toggle collapsed state when
their header row is clicked, instead of requiring a dedicated collapse
button. The chevron (CollapseToggle) becomes a purely visual, non-focusable
indicator for these sections; HelpIcon and PopOutButton now stop
propagation so they keep working without also collapsing the section.
The log viewer's toggle (App.tsx/FilterBar) keeps its dedicated button,
since that row is a filter toolbar with an editable input rather than a
plain title bar, so CollapseToggle's onToggle prop stays available for
that case.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XFUNZwCvz3kcod3352ZR2o
