feat: enhancer chat says when the reply comes

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

movie_editor/frontend/composer.js

@@ -1195,6 +1195,17 @@
         thread.append(b);
       });
     }
+    // The last word is yours: say when the reply comes, or two comments with no answer
+    // read as a broken chat (the model only answers inside a generation).
+    else if (rounds.length) {
+      const running = ["queuing", "running", "pending"].includes(st.gen?.state);
+      const w = el("div", "enh-bubble enh-bubble-model enh-bubble-latest enh-bubble-wait");
+      w.append(el("div", "enh-bubble-who", "Enhancer"),
+        el("div", "enh-bubble-text", running
+          ? "Writing its reply now, inside this generation."
+          : "Replies when you press Generate — to everything since its last rewrite."));
+      thread.append(w);
+    }
     if (thread.childNodes.length) {
       box.append(thread);
       requestAnimationFrame(() => { thread.scrollTop = thread.scrollHeight; });   // newest in view

movie_editor/frontend/styles.css

@@ -2142,6 +2142,7 @@ body.tour-mode { overflow: hidden; }
 .enh-bubble-model { align-self: flex-start; background: var(--ink-2); }
 .enh-bubble-user { align-self: flex-end; border-color: var(--teal); }
 .enh-bubble-latest { border-style: dashed; }
+.enh-bubble-wait .enh-bubble-text { color: var(--muted); font-style: italic; }
 .enh-chat .btn:disabled { opacity: 0.42; pointer-events: none; cursor: default; }
 .enh-bubble-who { font-size: 10px; font-weight: 700; letter-spacing: .4px; text-transform: uppercase; color: var(--muted); margin-bottom: 3px; }
 .enh-bubble-text { font-size: 12px; line-height: 1.5; color: var(--text); white-space: pre-wrap; overflow-wrap: anywhere; user-select: text; }