Notes: multiple notes per section with last-edited dates, delete, sort by recently edited; Word export now readable; shared note-format module + tests; v2.43.0

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

package.json

@@ -1,7 +1,7 @@
 {
   "name": "siteforge",
   "private": true,
-  "version": "2.42.2",
+  "version": "2.43.0",
   "type": "module",
   "scripts": {
     "dev": "vite",