bugfix: GET /me/bookmarks returns total count (0.19.2)

The profile overview's bookmark counter showed 0 even when the user had bookmarks because /me/bookmarks left page.total null. Repo now returns the count alongside the rows; handler uses with_total.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/package.json

@@ -1,6 +1,6 @@
 {
   "name": "mangalord-frontend",
-  "version": "0.19.1",
+  "version": "0.19.2",
   "private": true,
   "type": "module",
   "scripts": {