Compare views rebuilt: from the zone's view, in sections, one line per record

The Compare views tab and jarl zone diff compare a zone with the same zone in other views from the view you're on: a summary per view, what is answered differently (Use this everywhere), the names only some views have (Add to VIEW), and how many are the same. One name can be compared (jarl zone diff ZONE NAME [TYPE], a Compare button per record). The CLI prints one line per record, cut to the terminal (--wide shows it whole); the web UI cuts long values with the whole one on hover. GET /zones/{zone}/compare returns these sections, with ?with, ?name and ?type.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/api.md

@@ -363,7 +363,7 @@ and `linked_with` (the other views).
 | POST | `/zones/{zone}/fill-ptr` | Adds the PTR records a reverse zone lacks for its view's A and AAAA records ([reverse.md](reverse.md)) |
 | GET | `/reverse-zones/suggestions` | The reverse zones the private views lack: `view_id`, `view`, `prefix`, `zone`, `group` (`yours`, or `public`: only if the address is yours), `why`, `fill` (PTR records it would get), `samples` |
 | POST | `/reverse-zones/dismiss` | `{"view": "internal", "prefix": "185.199.108.153/32"}`: don't suggest it again (`/undismiss` brings it back). A view's `reverse_suggestions: false` (PATCH `/views/{id}`) stops its suggestions |
-| GET | `/zones/{zone}/compare` | The zone across the views that have it (`?views=a,b`; `?all=1` also the same rows): `views`, `linked`, `same` (count) and `rows` (name, type, `same`, per view `records`, `ids`, `linked`). The zone may be named without a view |
+| GET | `/zones/{zone}/compare` | The zone compared with the same zone in other views, from its own view ([views.md](views.md#comparing-views)): `?with=a,b` (default: all), `?name=www&type=A` (one name, the same records included), `?all=1`. Returns `base`, `views`, `linked`, `summary` (per other view: `different`, `only_base`, `only_other`, `same`), `different` and `only` (`views`, `rows`) rows (name, `fqdn`, type, per view `records`, `data`, `ids`, `ttl`, `linked`), `same`, `same_rows`. A zone named without its view is compared from the first view that has it |
 
 `POST /zones` takes `"link_with": "VIEW"` to create a zone linked with
 that view's zone of the same name.