## Summary
Virtualize the shared job queue history list so opening the jobs panel
does not eagerly mount the full history on cloud.
## Changes
- **What**: Virtualize the shared queue history list used by the overlay
and sidebar, flatten date headers plus job rows into a single virtual
stream, and preserve hover/menu behavior with updated queue list tests.
- **Why `@tanstack/vue-virtual` instead of Reka virtualizers**: the
installed `reka-ui@2.5.0` does not expose a generic list virtualizer. It
only exposes `ListboxVirtualizer`, `ComboboxVirtualizer`, and
`TreeVirtualizer`, and those components inject `ListboxRoot`/`TreeRoot`
context and carry listbox or tree selection/keyboard semantics. The job
history UI is a flat grouped action list, not a selectable listbox or
navigable tree, so this uses the same TanStack virtualizer layer
directly without forcing the wrong semantics onto the component.
## Review Focus
Please verify the virtual row sizing and inter-group spacing behavior
across date headers and the last row in each group.
> [!TIP]
> Diff reads much cleaner through vscode's unified view with show
leading/trailing whitespace differences enabled
Linear: COM-304
https://tanstack.com/virtual/latest/docs/api/virtualizer
┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-10592-fix-virtualize-cloud-job-queue-history-list-3306d73d3650819d956bf4b2d8b59a40)
by [Unito](https://www.unito.io)
