Add custom fields + warranty plugin, rework settings into two-pane shell

Feature work from the 2026-07 session:

Settings IA
- Replace the flat 27-card settings hub with a persistent two-pane shell
  (SettingsLayout.vue): grouped, searchable left rail + content pane.
- Nest all settings/* routes under the shell via router post-processing;
  shared nav catalog in settingsNav.js. Group by asset class (PCs, Printers,
  Equipment, Network) so per-type settings stop scattering.

Custom fields (core)
- customfields + customfieldvalues tables (migration 7d14), CRUD API at
  /api/customfields, per-asset value get/save.
- Settings management page + reusable CustomFieldsSection (detail) and
  CustomFieldsInputs (form) wired into all four asset types.

Warranty (new plugin)
- plugins/warranty: warranties + warrantyassets (migration 7d15), derived
  coverage status, provider abstraction (manual now; Dell/Lenovo/HP stubs).
- API CRUD + per-asset panel + report buckets; WarrantyPanel on all four
  detail pages; Warranties management page; Warranty report + Reports card.
- Seed warranty.* permissions.

Printer drivers
- printerdrivers table (migration 7d13) linked to printer models; drivers now
  surface on the matching printer's detail page.

Other
- PCDetail rebalanced (Network + Status + Warranty + custom fields on the right).
- Rename PCs list "Features" column to "Remote Access"; fix badge hover underline.
- Drop equipment islocationonly field.
- Centralize asset-type label/route maps into utils/assetTypes.js.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/src/views/applications/ApplicationDetail.vue

@@ -75,7 +75,7 @@
           <!-- Application Notes -->
           <div class="section-card" v-if="app.applicationnotes">
             <h3 class="section-title">Application Notes</h3>
-            <div class="notes-text" v-html="app.applicationnotes"></div>
+            <div class="notes-text">{{ app.applicationnotes }}</div>
           </div>
 
           <!-- Versions -->
@@ -326,13 +326,9 @@ function handleImageError(e) {
   font-size: 1.125rem;
 }
 
-/* Notes styling */
-.notes-text :deep(a) {
-  color: var(--primary);
-  text-decoration: none;
-}
-
-.notes-text :deep(a:hover) {
-  text-decoration: underline;
+/* Notes styling - rendered as escaped plain text, preserve author line breaks */
+.notes-text {
+  white-space: pre-wrap;
+  word-break: break-word;
 }
 </style>