fix(web): use column.id in task move popover
The /tasks API returns project columns as { id: slug, name, isFinal, tasks }
with no `slug` property. TaskMovePopover referenced `column.slug` which was
always undefined, causing every status match to fail silently and ultimately
crashing when the Select rendered items: `getStatusLabel(undefined)` reaches
toDisplayCase, which calls `.replace` on undefined.
Fixes "Cannot read properties of undefined (reading 'replace')" on opening
the task move popover and picking a destination project.