refactor(addressbook): move from aside icon-bar to explorer nav link

Introduce generic explorer.nav_item slot type in app-main-aside.phtml
so modules can contribute links to the explorer nav panel.

Switch addressbook module from aside.tab_panel to explorer.nav_item.
Remove aside department-filter panel, AddressBookLayoutProvider, and
AddressBookSessionProvider (only served the now-removed aside panel).

Fix grid Name column overflow into Email column: CSS selector
.grid-name-cell > span:last-child never matched the <a> name link;
changed to :last-child and scoped flex-shrink:0 to :first-child only.

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

modules/addressbook/module.php

@@ -3,8 +3,8 @@
 /**
  * Address Book module manifest.
  *
- * Contributes routes, sidebar slots, search entry, user-edit aside action,
- * layout context data, and session lifecycle.
+ * Contributes routes, explorer nav link, search entry, user-edit aside action,
+ * and authorization policy.
  */
 return [
     'id' => 'addressbook',
@@ -27,16 +27,12 @@ return [
     ],
 
     'ui_slots' => [
-        'aside.tab_panel' => [
+        'explorer.nav_item' => [
             [
-                'key' => 'people',
+                'key' => 'address-book',
                 'label' => 'Address book',
-                'icon' => 'bi-people',
                 'href' => 'address-book',
                 'permission' => 'addressbook.view',
-                'panel_template' => 'templates/aside-people-panel.phtml',
-                'details_storage' => 'aside-people-tenant',
-                'details_open_active' => true,
                 'order' => 110,
             ],
         ],
@@ -77,13 +73,9 @@ return [
     ],
     'scheduler_jobs' => [],
 
-    'layout_context_providers' => [
-        \MintyPHP\Module\AddressBook\Providers\AddressBookLayoutProvider::class,
-    ],
+    'layout_context_providers' => [],
 
-    'session_providers' => [
-        \MintyPHP\Module\AddressBook\Providers\AddressBookSessionProvider::class,
-    ],
+    'session_providers' => [],
 
     'permissions' => [
         [