feat: admin settings page UI/UX pass with WordPress-native patterns

- Header: h1 + logo in a wrapping flex row, hr.wp-header-end before the tabs,
  aria-current on the active tab; own CSS/JS enqueued only on this screen.
- Verbindung: ordered "So verbindest du Claude" steps, copy button (core
  clipboard.js + wp.a11y.speak), Site-Health-style status list, German details.
- Zugriff: roles as form-table fieldset, connections with site date format,
  empty-state row, confirm on revoke; ConnectionUsage records last use via
  WP_Application_Passwords::record_application_password_usage (once a day).
- Tools: plain-language legend, counter as inline notice, groups as core
  postboxes (postbox.js toggles, per-user closed state, summary when closed),
  fixed column widths with new "Art" column, submit above and below.
- Protokoll: site-timezone times with UTC tooltip, result icons, filters with
  labels in the list table nav, retention link to Limits.
- Limits: short labels with units and descriptions; snapshot count hidden but
  preserved.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/Plugin.php

@@ -11,6 +11,7 @@ use LIT\MCP\Admin\AdminNotices;
 use LIT\MCP\Admin\ConnectionRepository;
 use LIT\MCP\Admin\ConnectionStatus;
 use LIT\MCP\Admin\ConnectionTab;
+use LIT\MCP\Admin\ConnectionUsage;
 use LIT\MCP\Admin\LimitsTab;
 use LIT\MCP\Admin\LogTab;
 use LIT\MCP\Admin\SettingsPage;
@@ -87,13 +88,20 @@ final class Plugin
 
         $status = new ConnectionStatus();
         (new SiteHealth($status))->register();
-        self::$settingsPage = new SettingsPage([
+        $tabs = [
             new ConnectionTab($status),
             new AccessTab($access, new ConnectionRepository()),
             new ToolsTab($registry, $policy),
             new LogTab($changeLog, $limits),
             new LimitsTab(),
-        ], plugins_url('assets/img/loosen-it-logo.svg', self::$pluginFile));
+        ];
+        self::$settingsPage = new SettingsPage(
+            $tabs,
+            plugins_url('assets/img/loosen-it-logo.svg', self::$pluginFile),
+            plugins_url('assets', self::$pluginFile),
+            self::VERSION
+        );
+        (new ConnectionUsage())->register();
         if (is_admin()) {
             self::$settingsPage->register();
             (new AdminNotices($status))->register();