some fixes

app/Http/Requests/UpdateWebsiteRequest.php

@@ -11,11 +11,43 @@ class UpdateWebsiteRequest extends FormRequest
         return true;
     }
 
+    protected function prepareForValidation(): void
+    {
+        // Normalize domain: remove protocol and www, trim slashes
+        if ($this->has('domain')) {
+            $domain = $this->input('domain');
+
+            // Remove protocol (http://, https://)
+            $domain = preg_replace('#^https?://#i', '', $domain);
+
+            // Remove www.
+            $domain = preg_replace('#^www\.#i', '', $domain);
+
+            // Remove trailing slashes and paths
+            $domain = strtok($domain, '/');
+
+            // Trim whitespace
+            $domain = trim($domain);
+
+            $this->merge([
+                'domain' => $domain,
+            ]);
+        }
+    }
+
     public function rules(): array
     {
+        $websiteId = $this->route('website')->id;
+
         return [
-            'name' => ['required', 'string', 'max:255'],
-            'domain' => ['required', 'string', 'max:255', 'regex:/^([a-zA-Z0-9-]+\.)+[a-zA-Z]{2,}$/'],
+            'name' => ['required', 'string', 'min:1', 'max:255'],
+            'domain' => [
+                'required',
+                'string',
+                'max:255',
+                'regex:/^([a-zA-Z0-9]([a-zA-Z0-9-]*[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$/',
+                'unique:websites,domain,' . $websiteId . ',id,user_id,' . $this->user()->id,
+            ],
             'is_active' => ['sometimes', 'boolean'],
         ];
     }
@@ -23,7 +55,8 @@ class UpdateWebsiteRequest extends FormRequest
     public function messages(): array
     {
         return [
-            'domain.regex' => 'Please enter a valid domain (e.g. example.com).',
+            'domain.regex' => 'Please enter a valid domain (e.g. example.com or subdomain.example.com).',
+            'domain.unique' => 'You already have a website with this domain.',
         ];
     }
 }