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

gateway/src/contract.ts

@@ -126,11 +126,24 @@ export interface Feed {
   needsYou: FeedItem[];
   /** Starting or running. Most recently updated first. */
   working: FeedItem[];
-  /** Completed or failed in the last 24 hours. Most recent first, at most 10. */
+  /** Completed or failed and not yet settled. Most recent first, at most 10. */
   recent: FeedItem[];
+  /** How many threads Recent holds in all. More than `recent.length` means `GET /v1/recent` has the rest. */
+  recentTotal: number;
   hosts: HostSummary[];
 }
 
+export interface RecentResponse {
+  /** Every unsettled finished thread, most recent first. */
+  items: FeedItem[];
+}
+
+export interface SettleRecentResponse {
+  settled: number;
+  /** Threads T3 refused to settle, or whose host was offline. */
+  failed: number;
+}
+
 export interface Message {
   id: string;
   role: "user" | "assistant" | "system";