39c421806d
Select All checkbox in header row: - Toggles all visible checkboxes at once - Shows indeterminate state when partially selected - Syncs with individual checkbox changes Shift-click range selection: - Hold Shift + click to select/deselect a range of rows - Tracks last clicked index for range calculation Selection count badge: - Shows "N selected / M runs" in the run count badge when items selected - Updates on every checkbox change Header updated to include Score column matching the data grid. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>