Rebuild global search as a live search palette

- Press / or Ctrl+K (or click the top bar box) for results as you type,
  grouped by type, with keyboard navigation and recent clients when empty
- Ticket/invoice/quote numbers jump to the top; Enter opens immediately
- Phone, IP (any interface) and MAC matching; app pages offered by name
- Full results page rebuilt on the same search: totals, links into each
  list page, ticket conversation and document text matches
- Passwords no longer rendered into the results page; reveal/copy go
  through the audited endpoint
- Fix stray }); breaking inline scripts on asset and contact pages

includes/footer.php

@@ -81,6 +81,7 @@
 <script src="/js/ajax_modal.js"></script>
 <script src="/js/confirm_modal.js"></script>
 <script src="/js/date_filter.js"></script>
+<script src="/js/global_search.js"></script>
 
 </body>
 </html>

includes/top_nav.php

@@ -8,16 +8,19 @@
         </li>
     </ul>
 
-    <!-- SEARCH FORM -->
+    <!-- SEARCH - js/global_search.js turns this box into the opener for the
+         search palette (also on / and Ctrl+K). Without the script it is still
+         a plain form posting to the full results page. -->
     <form class="navbar-search ms-auto" role="search" action="/agent/global_search.php">
         <label for="navbar-search-input" class="visually-hidden">Search everywhere</label>
         <div class="navbar-search-field">
             <input class="form-control" type="search" id="navbar-search-input" name="query"
-                placeholder="Search everywhere" autocomplete="off"
+                placeholder="Search everywhere" autocomplete="off" aria-keyshortcuts="/ Control+K"
                 value="<?php if (isset($_GET['query'])) { echo escapeHtml($_GET['query']); } ?>">
             <button class="navbar-search-submit" type="submit" aria-label="Submit search">
                 <i class="fas fa-search" aria-hidden="true"></i>
             </button>
+            <kbd class="navbar-search-kbd d-none d-lg-inline" aria-hidden="true">/</kbd>
         </div>
     </form>