feat(helpdesk): add software updates tracking with BC ticket integration

New Updates page in the Helpdesk module that fetches UPDATE/UPDATE-HF tickets
from Business Central (PBI_LV_Tickets) and allows assigning a domain and Gitea
link via a dialog. Ticket status (from BC) and assignment status (local) are
shown as separate columns with filters for both plus type and free-text search.
Assigned updates also appear on the domain detail page. Includes session-cached
BC fetch with refresh button, admin permissions, migration, and 16 unit tests.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/css/vendor-overrides/gridjs.css

@@ -301,6 +301,19 @@
     margin: 0;
   }
 
+  /* Reset button margin inside grid cells (Pico/framework default adds margin-bottom) */
+  td.gridjs-td button,
+  td.gridjs-td [role="button"] {
+    margin: 0;
+  }
+
+  /* Inline action buttons side by side in a cell */
+  td.gridjs-td .app-inline-actions {
+    display: inline-flex;
+    gap: 0.35rem;
+    align-items: center;
+  }
+