diff --git a/l4d2web/l4d2web/static/js/files-overlay.js b/l4d2web/l4d2web/static/js/files-overlay.js
index cffc9fe..27ccb88 100644
--- a/l4d2web/l4d2web/static/js/files-overlay.js
+++ b/l4d2web/l4d2web/static/js/files-overlay.js
@@ -281,12 +281,29 @@
     saveBtn: editorDialog.querySelector(".files-editor-save"),
   };
 
+  // Bridge to the CodeMirror 6 controller, set up by static/js/editor.js
+  // on the .files-editor-content textarea. Falls back to the textarea
+  // directly if the bundle didn't load (no-JS fallback / file open
+  // before the controller has been mounted).
+  function getEditorValue() {
+    return (window.__filesEditor && window.__filesEditor.getValue)
+      ? window.__filesEditor.getValue()
+      : editorEls.contentBox.value;
+  }
+  function setEditorValue(text) {
+    if (window.__filesEditor && window.__filesEditor.setContent) {
+      window.__filesEditor.setContent(text);
+    } else {
+      editorEls.contentBox.value = text;
+    }
+  }
+
   function setEditorTitle(text) {
     editorEls.title.textContent = text;
   }
 
   function updateByteCount() {
-    const bytes = new TextEncoder().encode(editorEls.contentBox.value).length;
+    const bytes = new TextEncoder().encode(getEditorValue()).length;
     editorEls.byteCount.textContent = `UTF-8 · ${bytes} bytes`;
   }
 
@@ -342,7 +359,7 @@
     setEditorTitle(`${folder ? folder + "/" : ""}…new file`);
     editorEls.filename.value = "";
     editorEls.filename.disabled = false;
-    editorEls.contentBox.value = "";
+    setEditorValue("");
     editorEls.contentBox.disabled = false;
     editorEls.renameHint.hidden = true;
     editorEls.textPanel.hidden = false;
@@ -375,14 +392,14 @@
       editor.mode = "text";
       editorEls.textPanel.hidden = false;
       editorEls.binaryPanel.hidden = true;
-      editorEls.contentBox.value = "Loading…";
+      setEditorValue("Loading…");
       editorEls.contentBox.disabled = true;
 
       const r = await fetchJson(
         `${baseUrl}/files/content?path=${encodeURIComponent(path)}`
       );
       if (r.ok && r.body) {
-        editorEls.contentBox.value = r.body.content;
+        setEditorValue(r.body.content);
         editorEls.contentBox.disabled = false;
         updateByteCount();
         updateSaveEnabled();
@@ -461,7 +478,7 @@
       // Text-flavor create → /save with no new_path.
       const r = await postJson(`${baseUrl}/files/save`, {
         path: newRel,
-        content: editorEls.contentBox.value,
+        content: getEditorValue(),
       });
       if (r.ok) {
         editorDialog.close();
@@ -476,7 +493,7 @@
           // For files, a plain /save overwrite is fine.
           const r2 = await postJson(`${baseUrl}/files/save`, {
             path: newRel,
-            content: editorEls.contentBox.value,
+            content: getEditorValue(),
           });
           if (r2.ok) {
             editorDialog.close();
@@ -491,7 +508,7 @@
           const altered = withCollisionSuffix(newRel);
           const r2 = await postJson(`${baseUrl}/files/save`, {
             path: altered,
-            content: editorEls.contentBox.value,
+            content: getEditorValue(),
           });
           if (r2.ok) {
             editorDialog.close();
@@ -508,7 +525,7 @@
     if (editor.mode === "text") {
       const payload = {
         path: editor.originalPath,
-        content: editorEls.contentBox.value,
+        content: getEditorValue(),
       };
       if (renaming) payload.new_path = newRel;
       const r = await postJson(`${baseUrl}/files/save`, payload);