fix(forge): quitter le plein ecran avant d'ouvrir l'assistant IA (BUG-056)

frontend/editor-poc.html

@@ -1200,9 +1200,23 @@ body { font-family: var(--sans); background: var(--bg); color: var(--text); heig
   // iframe, so the AI button simply asks the parent to open it — no duplicated
   // panel, and the configured provider/model is shared automatically.
   function openAssistant() {
-    try {
-      window.parent.postMessage({ type: 'forge-open-ai' }, '*');
-    } catch (e) { /* not embedded */ }
+    var notify = function() {
+      try {
+        window.parent.postMessage({ type: 'forge-open-ai' }, '*');
+      } catch (e) { /* not embedded */ }
+    };
+    // The shared assistant lives in the parent document, which cannot render
+    // above a fullscreen Forge iframe: leave fullscreen first so the panel is
+    // actually visible when it opens.
+    if (document.fullscreenElement && document.exitFullscreen) {
+      try {
+        var p = document.exitFullscreen();
+        if (p && p.then) p.then(notify, notify);
+        else notify();
+      } catch (e) { notify(); }
+    } else {
+      notify();
+    }
   }
 
   // ---- Fullscreen (#101) ----