Frontend: asset identifiers, statuses, printer types, UI fixes

- Wire gauge/maintenance refs + identifier toggles into equipment pages.
- Repoint status dropdowns and Settings>Statuses to asset statuses.
- Printer type column/filter; require vendor before model; printer-model picker.
- Per-type identifier labels; printer detail title fallback.
- Fixes: truncate long description cells, opaque supply modal, readable
  dark-mode autofill, drum/waste default colorless.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

frontend/src/views/settings/VLANsList.vue

@@ -50,7 +50,7 @@
                   </span>
                   <span v-else>-</span>
                 </td>
-                <td>{{ vlan.description || '-' }}</td>
+                <td class="cell-truncate" :title="vlan.description">{{ vlan.description || '-' }}</td>
                 <td>
                   <router-link
                     :to="{ path: '/settings/subnets', query: { vlanid: vlan.vlanid } }"