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>

backend/src/api/bookmarks.rs

@@ -111,6 +111,7 @@ async fn list_me(
 ) -> AppResult<Json<PagedResponse<BookmarkSummary>>> {
     let limit = params.limit.clamp(1, 200);
     let offset = params.offset.max(0);
-    let items = repo::bookmark::list_for_user(&state.db, user.id, limit, offset).await?;
-    Ok(Json(PagedResponse::new(items, limit, offset)))
+    let (items, total) =
+        repo::bookmark::list_for_user(&state.db, user.id, limit, offset).await?;
+    Ok(Json(PagedResponse::with_total(items, limit, offset, total)))
 }