- Replace ChartTooltipContent with custom tooltip that reads fill
directly from payload — guaranteed to show the slice color
- Subtitle adapts: shows 'current and previous period' only when
previous period data exists, otherwise 'rage vs dead breakdown'
- Filter out zero-count slices from chart data
- Switch FrustrationTable from flex to grid columns so headers
and row cells share the same column widths
- Replace bar chart with pie chart for frustration trend
- Remove Card wrapper borders, footer line, and total signals text
- Change dead clicks color from yellow to darker orange
- Add column headers to rage/dead click tables
- Rich empty states with icons matching dashboard pattern
- Add frustration trend comparison chart (current vs previous period)
- Show "New" badge instead of misleading "+100%" when previous period is 0
- Click-to-copy on CSS selectors with toast feedback
- Normalize min-height to 270px for consistent card sizing
- Fix page title to include site domain (Behavior · domain | Pulse)
- Add "last seen" column with relative timestamps
