fix(vpn): drop the previous config before showing a new access

Creating a second access with a supplied key skipped the config branch, so the
first access's private configuration stayed on screen under the new name — and
someone would have handed it out.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/Livewire/Admin/Vpn.php

@@ -159,6 +159,11 @@ class Vpn extends Component
 
         ApplyVpnPeer::dispatch($peer->public_key, $peer->allowed_ip, true);
 
+        // Whatever was on screen belongs to the previous access. Leaving it up
+        // after creating another one would present the wrong private config
+        // under the new name — and someone would hand it out.
+        $this->dismissConfig();
+
         // Only a key we generated can be turned into a ready-to-use config.
         if ($keypair !== null) {
             $config = $this->clientConfig($keypair, $peer->allowed_ip);

tests/Feature/Admin/VpnTest.php

@@ -692,3 +692,25 @@ it('stops serving a revealed config once the access is revoked', function () {
     $modal->call('toggleQr')->assertForbidden();
     expect(App\Services\Wireguard\ConfigHandoff::get($token))->toBeNull();
 });
+
+it('never leaves the previous config on screen after another access is created', function () {
+    vpnHub();
+    Queue::fake();
+    $owner = operator('Owner');
+
+    $component = Livewire::actingAs($owner)->test(Vpn::class)
+        ->set('name', 'Erster')->set('ownerId', $owner->id)
+        ->call('create');
+    $firstToken = $component->get('configToken');
+    expect(App\Services\Wireguard\ConfigHandoff::get($firstToken))->toContain('PrivateKey');
+
+    // Second access brings its own key, so there is no config to show — the
+    // first one must not stay up wearing the second one's name.
+    $component->set('name', 'Zweiter')->set('publicKey', Keypair::generate()->publicKey)
+        ->call('create')
+        ->assertHasNoErrors();
+
+    expect($component->get('configToken'))->toBeNull()
+        ->and($component->get('newConfigName'))->toBeNull()
+        ->and(App\Services\Wireguard\ConfigHandoff::get($firstToken))->toBeNull();
+});