Gateway: keep finished threads in Recent until settled, with a full list and settle-all route

docs/api.md

@@ -58,13 +58,15 @@ GET /v1/feed
   "needsYou": [FeedItem],
   "working":  [FeedItem],
   "recent":   [FeedItem],
+  "recentTotal": 12,
   "hosts": [{ "id": "...", "label": "Mac mini", "status": "online", "error": null }]
 }
 ```
 
 `needsYou` holds threads waiting for an approval or an answer, oldest first. `working` holds running
-threads, most recently updated first. `recent` holds threads that completed or failed in the last 24
-hours, at most 10. Host `status` is one of `connecting`, `online`, `offline`, `auth_invalid`, or
+threads, most recently updated first. `recent` holds threads that completed or failed and are not
+settled yet, however old, newest first and at most 10. `recentTotal` counts all of them. When it is
+larger, the rest come from `GET /v1/recent`. Host `status` is one of `connecting`, `online`, `offline`, `auth_invalid`, or
 `incompatible`.
 
 ```
@@ -145,8 +147,25 @@ POST /v1/threads/:hostId/:threadId/settle
 202
 ```
 
-Settles a thread, as in T3. A settled thread that finished or failed leaves the feed. To settle all
-of Recent, settle each item.
+Settles a thread, as in T3. A settled thread that finished or failed leaves the feed.
+
+```
+GET /v1/recent
+
+200 { "items": [FeedItem] }
+```
+
+Every unsettled finished thread, newest first. `lastMessage` is null for threads the gateway has not
+read yet, since it does not fetch them all for this list.
+
+```
+POST /v1/recent/settle
+
+200 { "settled": 11, "failed": 0 }
+```
+
+Settles every completed thread in Recent, including those past the first 10. Failed threads stay.
+`failed` counts threads T3 refused or whose host was offline.
 
 Thread detail fills `request` and `via` the same way as the feed when a subagent waits on you.