feat(security): add editable cloud credential pages

Add dedicated show/edit pages for cloud provider tokens and cloud-init
scripts, including descriptions and UUID routes.

Generate private keys directly from the index and surface cloud provider
API loading errors in server creation flows.

app/Models/PrivateKey.php

@@ -291,7 +291,7 @@ class PrivateKey extends BaseModel
 
     public function getKeyLocation()
     {
-        return "/var/www/html/storage/app/ssh/keys/ssh_key@{$this->uuid}";
+        return Storage::disk('ssh-keys')->path("ssh_key@{$this->uuid}");
     }
 
     public function updatePrivateKey(array $data)