feat(metrics): add reachable /metrics fleet page skeleton

tests/Feature/Livewire/Fleet/MetricsPageTest.php

@@ -0,0 +1,33 @@
+<?php
+
+use App\Livewire\Fleet\Metrics;
+use App\Models\InstanceSettings;
+use App\Models\Team;
+use App\Models\User;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Livewire\Livewire;
+
+uses(RefreshDatabase::class);
+
+beforeEach(function () {
+    InstanceSettings::unguarded(fn () => InstanceSettings::query()->create(['id' => 0]));
+    $user = User::factory()->create();
+    $team = Team::factory()->create();
+    $user->teams()->attach($team, ['role' => 'owner']);
+    $this->actingAs($user);
+    session(['currentTeam' => $team]);
+    $this->team = $team;
+});
+
+it('renders the metrics page with an empty state when no server has metrics enabled', function () {
+    $component = loadLazy(Livewire::test(Metrics::class));
+
+    $component
+        ->assertOk()
+        ->assertSee('Metrics')
+        ->assertSee('Enable metrics on a server');
+});
+
+it('registers the metrics route', function () {
+    expect(route('metrics'))->toEndWith('/metrics');
+});