Enhance VM creation request validation and UI.

- Introduced `prepareForValidation` method to handle input merging for `behind_traefik` and `devices`.
- Updated validation rules to conditionally require `subdomain` based on `behind_traefik`.
- Added custom attribute names and error messages for better user feedback.
- Improved the create VM form to dynamically show/hide subdomain fields based on the `behind_traefik` checkbox state.
- Adjusted the user selection logic to display a message when no customers are available.

app/Http/Requests/StoreVmRequest.php

@@ -13,14 +13,55 @@ class StoreVmRequest extends FormRequest
         return $this->user()->can('create', Customer::class);
     }
 
+    protected function prepareForValidation(): void
+    {
+        $behindTraefik = $this->resolveBehindTraefik();
+
+        $merge = ['behind_traefik' => $behindTraefik];
+
+        if (! $behindTraefik) {
+            $merge['subdomain'] = null;
+        }
+
+        if ($this->has('devices') && is_array($this->input('devices'))) {
+            $devices = collect($this->input('devices'))
+                ->filter(fn ($device) => is_array($device) && ! empty($device['type']))
+                ->values()
+                ->all();
+
+            $merge['devices'] = $devices === [] ? null : $devices;
+        }
+
+        $this->merge($merge);
+    }
+
+    public function wantsTraefik(): bool
+    {
+        return $this->boolean('behind_traefik');
+    }
+
+    private function resolveBehindTraefik(): bool
+    {
+        if (! $this->has('behind_traefik')) {
+            return false;
+        }
+
+        $value = $this->input('behind_traefik');
+
+        if (is_array($value)) {
+            return in_array('1', $value, true) || in_array(1, $value, true) || in_array(true, $value, true);
+        }
+
+        return filter_var($value, FILTER_VALIDATE_BOOLEAN);
+    }
+
     public function rules(): array
     {
-        $baseDomain = config('hosting.plesk.base_domain');
-
         return [
             'name' => ['required', 'string', 'max:100', 'regex:/^[a-zA-Z0-9][a-zA-Z0-9_-]*$/'],
             'subdomain' => [
-                Rule::requiredIf(fn () => $this->boolean('behind_traefik')),
+                Rule::excludeIf(fn () => ! $this->wantsTraefik()),
+                Rule::requiredIf(fn () => $this->wantsTraefik()),
                 'nullable',
                 'string',
                 'max:63',
@@ -28,7 +69,6 @@ class StoreVmRequest extends FormRequest
             ],
             'behind_traefik' => ['boolean'],
             'user_id' => [
-                Rule::requiredIf(fn () => $this->user()->isAdmin()),
                 'nullable',
                 'exists:users,id',
             ],
@@ -46,7 +86,7 @@ class StoreVmRequest extends FormRequest
 
     public function domain(): ?string
     {
-        if (! $this->boolean('behind_traefik') || ! $this->filled('subdomain')) {
+        if (! $this->wantsTraefik() || ! $this->filled('subdomain')) {
             return null;
         }
 
@@ -61,4 +101,33 @@ class StoreVmRequest extends FormRequest
 
         return $this->user()->id;
     }
+
+    /**
+     * @return array<string, string>
+     */
+    public function attributes(): array
+    {
+        return [
+            'name' => 'VM-Name',
+            'subdomain' => 'Subdomain',
+            'user_id' => 'Kunde',
+            'cpu' => 'vCPUs',
+            'ram' => 'RAM',
+            'disk' => 'Festplatte',
+            'install_iso' => 'Installations-ISO',
+            'devices.*.type' => 'Gerätetyp',
+        ];
+    }
+
+    /**
+     * @return array<string, string>
+     */
+    public function messages(): array
+    {
+        return [
+            'required' => ':attribute ist erforderlich.',
+            'regex' => ':attribute hat ein ungültiges Format.',
+            'exists' => 'Der gewählte :attribute ist ungültig.',
+        ];
+    }
 }