Improve desktop editing experience

assets/editor/main.js

@@ -51,6 +51,10 @@
 
     var state = CM.EditorState.create({
         doc: hidden.value,
+        // Start with the caret at the end of the existing content — editing an
+        // existing page almost always means appending, and the default (start
+        // of doc) buries the caret behind the leading heading.
+        selection: { anchor: hidden.value.length },
         extensions: [
             CM.history(),
             CM.drawSelection(),