fix: guard mood readout length + handle /say fetch errors

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

static/app.js

@@ -22,7 +22,7 @@ function render(state) {
   const dy = (ap.droop || 0) * 14;
   $("#blob").style.transform = `translateX(-50%) translateY(${dy}px) scale(${ap.scale}) rotate(${lean}deg)`;
   $("#moodword").textContent = state.mood_word;
-  if (ap.mood) {
+  if (ap.mood && ap.mood.length === DIMS.length) {
     $("#moodReadout").textContent = DIMS.map((d, i) => `${d}  ${String(ap.mood[i]).padStart(3)}`).join("\n");
   }
 }
@@ -45,12 +45,16 @@ function speak(text, voice) {
 async function say() {
   const inp = $("#msg"); const text = inp.value.trim(); if (!text) return;
   inp.value = "";
-  const r = await fetch("/say", {method:"POST", headers:{"Content-Type":"application/json"}, body: JSON.stringify({text})});
-  if (!r.ok) return;
-  const state = await r.json();
-  render(state);
-  bubble(state.emoticon);          // the "words" are an emoticon
-  speak(state.simlish, state.voice); // the sound is simlish babble, client-side
+  try {
+    const r = await fetch("/say", {method:"POST", headers:{"Content-Type":"application/json"}, body: JSON.stringify({text})});
+    if (!r.ok) { bubble("…?"); return; }
+    const state = await r.json();
+    render(state);
+    bubble(state.emoticon);          // the "words" are an emoticon
+    speak(state.simlish, state.voice); // the sound is simlish babble, client-side
+  } catch (e) {
+    bubble("…?");
+  }
 }
 
 $("#send").onclick = say;