v1.6.4: fix RichEditor auto-scroll when opening offers with multiple sections

Replace Quill editor.format() with direct DOM style manipulation to
avoid getSelection(true) calls that steal focus and scroll the page
to the sections area on mount.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "app-ts",
-  "version": "1.6.3",
+  "version": "1.6.4",
   "description": "",
   "main": "dist/server.js",
   "scripts": {