fix: suppression boutons doublons Forge + delegation parent modal

- Retrait des 3 boutons (delete/cancel/save) de la barre Forge (doublons)
- Retrait des handlers JS associés dans editor-poc.html
- Le header parent ObsiGate reste visible quand Forge est ouvert
- Les boutons save/delete du parent délèguent à Forge via postMessage
- Forge écoute 'parent-save' et 'parent-delete' du parent
- state.editorVault/editorPath settés dans viewer.js pour le parent

frontend/js/utils.js

@@ -491,6 +491,20 @@ function closeEditor() {
 }
 
 async function saveFile(silent = false) {
+  // If Forge is open, delegate save to the iframe
+  var forgeFrame = document.getElementById("forge-iframe");
+  if (forgeFrame && forgeFrame.contentWindow) {
+    if (!state.editorVault || !state.editorPath) return;
+    var saveBtn = document.getElementById("editor-save");
+    var saveDot = document.getElementById("editor-save-dot");
+    var saveLabel = document.getElementById("editor-save-label");
+    if (saveDot) { saveDot.className = 'editor-save-dot saving'; }
+    if (saveLabel) saveLabel.textContent = 'Saving...';
+    if (saveBtn) { saveBtn.disabled = true; }
+    forgeFrame.contentWindow.postMessage({ type: 'parent-save' }, '*');
+    return;
+  }
+
   if ((!state.editorView && !state.fallbackEditorEl) || !state.editorVault || !state.editorPath) return;
 
   const content = state.editorView ? state.editorView.state.doc.toString() : state.fallbackEditorEl.value;
@@ -559,6 +573,14 @@ async function saveFile(silent = false) {
 }
 
 async function deleteFile() {
+  // If Forge is open, delegate delete to the iframe
+  var forgeFrame = document.getElementById("forge-iframe");
+  if (forgeFrame && forgeFrame.contentWindow) {
+    if (!state.editorVault || !state.editorPath) return;
+    forgeFrame.contentWindow.postMessage({ type: 'parent-delete' }, '*');
+    return;
+  }
+
   if (!state.editorVault || !state.editorPath) return;
 
   const deleteBtn = document.getElementById("editor-delete");