Speed up list pages and refine the timeline

The runs, units, logs, and API activity pages now paint their timeline chart instantly while keeping the richer interactive look.

• Improved first paint on list pages by loading the interactive chart layer off the critical path, so the bars appear immediately.
• Restored the smoother timeline look with hover tooltips and drag-to-filter range selection.
• Evened out the table header placeholders so columns line up while a page loads.