feat: add UserResource with is_admin toggle and delete

User management resource with editable is_admin field, postcode support,
admin filter, and inline delete action. Includes list and edit pages.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/Unit/Services/StationTaggingServiceTest.php

@@ -4,7 +4,7 @@ use App\Models\Station;
 use App\Services\StationTaggingService;
 
 beforeEach(function (): void {
-    $this->service = new StationTaggingService();
+    $this->service = new StationTaggingService;
 });
 
 it('marks tesco station as supermarket and normalises brand', function (): void {
@@ -54,10 +54,23 @@ it('handles case insensitive matching', function (): void {
         ->and($station->brand_name)->toBe('Morrisons');
 });
 
+it('marks station as supermarket when brand_name matches even if trading_name does not', function (): void {
+    $station = new Station([
+        'trading_name' => 'PETERBOROUGH EXTRA - PETROL FILLING STATION',
+        'brand_name' => 'TESCO',
+        'is_supermarket' => false,
+    ]);
+
+    $this->service->tag($station);
+
+    expect($station->is_supermarket)->toBeTrue()
+        ->and($station->brand_name)->toBe('Tesco');
+});
+
 it('does not overwrite brand_name for non-supermarket stations', function (): void {
     $station = new Station([
-        'trading_name'   => 'Shell Garage',
-        'brand_name'     => 'Shell',
+        'trading_name' => 'Shell Garage',
+        'brand_name' => 'Shell',
         'is_supermarket' => false,
     ]);