feat: integrate Obsidian notes into burg and marker editors

Replace the old TinyMCE notes editor with Obsidian integration in:
- Burg editor "Edit note" button
- Marker editor "Edit note" button

Changes:
- modules/ui/burg-editor.js: Update editBurgLegend() to call editObsidianNote()
- modules/ui/markers-editor.js: Update editMarkerLegend() to call editObsidianNote()
- Both functions fall back to old editNotes() if Obsidian is not configured
- index.html: Update version hashes to 1.108.13

Now when users click "Edit note" on a burg or marker, they get the modern
Markdown editor with Obsidian vault integration instead of the old WYSIWYG.

modules/ui/markers-editor.js

@@ -221,7 +221,14 @@ function editMarker(markerI) {
 
   function editMarkerLegend() {
     const id = element.id;
-    editNotes(id, id);
+
+    // Use Obsidian integration if available, otherwise fall back to old notes system
+    if (typeof editObsidianNote !== "undefined" && marker) {
+      const coordinates = {x: marker.x, y: marker.y};
+      editObsidianNote(marker.i, "marker", coordinates);
+    } else {
+      editNotes(id, id);
+    }
   }
 
   function toggleMarkerLock() {