CI 8616: the integration test asserted Vary == 'HX-Request', but the session
layer appends 'Cookie'. resp.vary.add keeps both; the test asserts membership.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
#5294 "Hosts list: search, group and status filters; sortable columns; a Groups column".
Ansible inventory groups are Steward's grouping system (operator's ruling): a host's
groups are its linked target's, and membership overlaps, so the list filters by group
rather than sectioning by it.
- Filter bar: search on name or address, a group (or "No group"), a status (Down,
Agent silent, Up, No monitors). The table swaps in alone and the URL keeps the filters.
- Name, Status, Latency, 30d uptime, CPU and Memory headers sort (sort_th in _macros);
problems-first stays the default, and a host with no value goes last either way.
- A Groups column of chips, each filtering to its group; shown when any group exists.
- A swap is keyed on HX-Target, so Back to a pushed URL still gets the page.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>