record how far a load got, so a memory kill reports its own ceiling

probe.html

@@ -129,4 +129,16 @@ document.getElementById("reset").onclick = () => {
   verdict.innerHTML = "";
   say("cleared");
 };
+
+// Auto-start: the button was easy to miss, and the whole point is that opening
+// the page is the entire interaction.
+if (localStorage.getItem(K.running) !== "1") {
+  let n = 3;
+  const tick = setInterval(() => {
+    document.getElementById("inc").textContent =
+      n > 0 ? `Starting in ${n}… (tap to stop)` : "Running";
+    if (n-- <= 0) { clearInterval(tick); document.getElementById("inc").click(); }
+  }, 1000);
+  document.getElementById("inc").addEventListener("click", () => clearInterval(tick), { once: true });
+}
 </script>