feat(ui): unify team, security, and notification settings layouts

Extract shared settings-layout components and a dedicated team
danger-zone page. Enable modal editing for security resources,
polish OAuth/API-token controls, and align notification and
service configuration UI with the new navigation patterns.

tests/Feature/Security/PrivateKeyDropdownTest.php

@@ -39,14 +39,14 @@ beforeEach(function () {
 
 test('private key index shows highlighted add dropdown actions', function () {
     Livewire::test(Index::class)
-        ->assertSee('+ Add')
+        ->assertSee('New private key')
         ->assertSee('Generate ED25519')
         ->assertSee('Generate RSA')
         ->assertSee('Add manually')
         ->assertDontSee('Manage your SSH keys for your servers and integrations.');
 });
 
-test('generating a private key from the index stores it and redirects to details', function () {
+test('generating a private key from the index stores it without redirecting to a detail page', function () {
     $component = Livewire::test(Index::class)
         ->call('generatePrivateKey', 'ed25519');
 
@@ -55,9 +55,9 @@ test('generating a private key from the index stores it and redirects to details
     expect($privateKey->team_id)->toBe($this->team->id)
         ->and($privateKey->public_key)->toStartWith('ssh-ed25519');
 
-    $component->assertRedirect(route('security.private-key.show', [
-        'private_key_uuid' => $privateKey->uuid,
-    ]));
+    $component
+        ->assertDispatched('success')
+        ->assertNoRedirect();
 });
 
 test('manual private key form does not expose key generation controls', function () {