Two non-blocking notes from review:
- the /api/repos effect now uses the same cancelled guard the
repo-filter effect already has, so an unmount mid-flight doesn't call
setRepos/setError on a gone component.
- Table's TableColumn gains an optional ariaSort field, consumed as the
<th>'s aria-sort attribute; the issue-report page's sortable columns
now report ascending/descending/none so a screen reader can announce
which column and direction is active, not just the sighted ▲/▼ glyph.
6e6bf62437