perf(panel): cached info and history paint first, lazy markdown up the thread, background prefetch

ui/src/lib/gateway.svelte.ts

@@ -5,6 +5,7 @@ import type {
   LimitWindow,
 } from "./api/types";
 import { panelCache } from "./panel/cache";
+import { browserHost } from "./panel/host";
 import { ConversationIndex } from "./panel/index.svelte";
 import { session } from "./session.svelte";
 
@@ -23,7 +24,7 @@ class Gateway extends ConversationIndex {
   jobs = $state<JobsResponse | null>(cache.get<JobsResponse>(JOBS_KEY) ?? null);
 
   constructor() {
-    super(() => session.client);
+    super(() => session.client, browserHost().cache ?? null);
   }
 
   async refreshJobs(): Promise<void> {