Load limiting safeguards

dashboard/src/inbox.md

@@ -3,21 +3,23 @@ title: Agent Inbox
 ---
 
 ```js
-import {API, POLL} from "./components/config.js";
+import {API, apiFetch, pollDelay, sleep} from "./components/config.js";
 ```
 
 ```js
 // Live poll: messages list
 const inboxState = (async function*() {
+  let failures = 0;
   while (true) {
     let messages = [], ok = false;
     try {
-      const resp = await fetch(`${API}/messages/?limit=100`);
+      const resp = await apiFetch("/messages/?limit=100");
       ok = resp.ok;
       if (ok) messages = await resp.json();
     } catch {}
+    failures = ok ? 0 : failures + 1;
     yield {messages, ok, ts: new Date()};
-    await new Promise(res => setTimeout(res, POLL));
+    await sleep(pollDelay({ok, failures}));
   }
 })();
 ```