fix(accounting): show latest journal entries first by default

The table fell back to the backend's own default order (entry_date, id
ascending) until a maker clicked a column header, so the oldest entries
sat at the top on every fresh load. Defaults the table's sort to id
descending instead.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/app/accounting/search-journal-entry/search-journal-entry.component.html

@@ -539,7 +539,7 @@
   </div>
 
   <div class="gl-table-shell">
-    <mat-table [dataSource]="dataSource" matSort class="gl-mat-table">
+    <mat-table [dataSource]="dataSource" matSort matSortActive="id" matSortDirection="desc" class="gl-mat-table">
       <!-- #ID -->
       <ng-container matColumnDef="id">
         <mat-header-cell *matHeaderCellDef mat-sort-header class="gl-th">#</mat-header-cell>