Event drawer, expandable rows, and responsive views
- Event detail drawer with scrollable sections (meta, session timeline, raw data)
- Clickable events everywhere - tables, lists, timelines all open the drawer
- ExpandableListItem shared component with CSS-hide trick to avoid re-fetching
- ResponsiveView component replacing CSS media queries for table/list switching
- Shared UserDetailsList and EventUserName components
- Session events cache in event store (useMapStore) to avoid duplicate API calls
- User expanded row with 2-column layout (meta + top events/sessions)
- Event summaries expanded row with 2-column layout (meta + activity timeline)
- Deep signals for reactive drawer content updates