Align visual style with Pages, Referrers, and Locations panels — flat
rows with hover state, rank numbers, muted count colors, and a
slide-in percentage on hover. Add empty slots for consistent height.
Dashboard filtering: FilterBar pills, AddFilterDropdown with dimension/
operator/value steps, URL-serialized filters, all SWR hooks filter-aware.
Custom event properties: pulse.track() accepts props object, EventProperties
panel with auto-discovered key tabs and value bar charts, clickable goal rows.
Updated changelog with both features under v0.13.0-alpha.
