Remove TODO.txt integration

assets/tree-sidebar.js

@@ -7,8 +7,7 @@
 // omits the container).
 
 (function () {
-    // The aside is shared with the todo widget (todo-rail.js); this script owns
-    // only the .tree-scroll child so neither feature clobbers the other.
+    // This script owns the .tree-scroll child of the aside, not the aside itself.
     var container = document.querySelector('aside.tree-sidebar .tree-scroll');
     if (!container) return;
 
@@ -190,11 +189,10 @@
     }
 
     // Mobile: the tree FAB sits at the bottom of the stacked FAB group and
-    // opens the tree's scroll container (not the whole aside — the todo widget
-    // has its own FAB/overlay) in the full-viewport Overlay (overlay.js). The
-    // container always exists when not editing, so — per the layout spec —
-    // the FAB always renders; the overlay auto-closes when a folder/file link
-    // inside it navigates. Hidden on desktop by .fab CSS.
+    // opens the tree's scroll container in the full-viewport Overlay
+    // (overlay.js). The container always exists when not editing, so — per the
+    // layout spec — the FAB always renders; the overlay auto-closes when a
+    // folder/file link inside it navigates. Hidden on desktop by .fab CSS.
     function setupFab() {
         var fab = document.createElement('button');
         fab.type = 'button';