feat(server): auto-resolve Sentinel URL and polish setup UI

Ensure a Sentinel endpoint from instance FQDN/IP when enabling, use process dialogs for validation with install state, and tidy server create, boarding, metrics empty state, and log timestamps.

tests/Feature/ServerCreatePageLayoutTest.php

@@ -0,0 +1,10 @@
+<?php
+
+test('server creation uses the standard page title without redundant navigation', function () {
+    $view = file_get_contents(resource_path('views/livewire/server/create.blade.php'));
+
+    expect($view)
+        ->toContain('<h1 class="min-w-0 text-[24px]! leading-7! font-semibold! tracking-tight!">New server</h1>')
+        ->not->toContain('Back to servers')
+        ->not->toContain('title="Add a server"');
+});