feat(ui): multi-operator selection

[johallar]

Description

BE allows filtering by multiple operators, and this is used to filter by high level operators. This takes it to the next step and allows users to select multiple operators in any view (DAG, timeline) to filter timelines.

Related Issues

N/A

Testing

• In DAG view, click to select multiple operators in one plan. Try logical and physical plans.
• Timelines on the right should be filtered by all selected operators
• Operator badges should appear in the filter area above timelines, Clear all button should be present.
• When many operators are selected, they are truncated in the timeline toolbar

• Select/deselect operators from the timeline view
• Node detail panel below dag should be populated with all selected operator stats. Changes were also made to color code + nest these operators

Screenshots

Screen.Recording.2026-08-21.at.4.28.52.PM.mov