Add command to reprocess existing media with correct aspect-ratio scaling

ProcessMedia was using resize(), which distorts images that aren't the
target aspect ratio; scale() preserves it. Existing medium/small
variants generated before this fix need regenerating, so add an
artisan command (with --dry-run) to do that, plus feature tests.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/Console/Commands/ReprocessMediaImages.php

@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Console\Commands;
+
+use App\Models\Media;
+use Illuminate\Console\Command;
+use Illuminate\Support\Facades\Storage;
+use Intervention\Image\Exceptions\DecoderException;
+use Intervention\Image\ImageManager;
+
+class ReprocessMediaImages extends Command
+{
+    protected $signature = 'app:reprocess-media-images {--dry-run : List images that would be processed without making changes}';
+
+    protected $description = 'Regenerate medium and small image variants using correct aspect-ratio scaling';
+
+    public function handle(ImageManager $manager): void
+    {
+        $media = Media::where('type', 'image')
+            ->whereNotNull('image_widths')
+            ->where('image_widths', '>', 1000)
+            ->get();
+
+        $dryRun = $this->option('dry-run');
+
+        $this->info("Found {$media->count()} images to reprocess." . ($dryRun ? ' (dry run)' : ''));
+
+        foreach ($media as $item) {
+            $path = $item->path;
+
+            if (! Storage::disk('public')->exists($path)) {
+                $this->warn("{$path}: original not found on public disk, skipping.");
+                continue;
+            }
+
+            if ($dryRun) {
+                $this->line("{$path} ({$item->image_widths}px wide)");
+                continue;
+            }
+
+            $this->info("Processing: {$path}");
+
+            try {
+                $file = Storage::disk('public')->get($path);
+                $image = $manager->read($file);
+            } catch (DecoderException) {
+                $this->warn("  Could not decode image, skipping.");
+                continue;
+            }
+
+            $filenameParts = explode('.', $path);
+            $extension = array_pop($filenameParts);
+            $basename = trim(implode('.', $filenameParts), '.');
+
+            $medium = $image->scale(width: 1000);
+            Storage::disk('public')->put($basename.'-medium.'.$extension, (string) $medium->encode());
+
+            $small = $image->scale(width: 500);
+            Storage::disk('public')->put($basename.'-small.'.$extension, (string) $small->encode());
+
+            $this->info("  Done.");
+        }
+
+        $this->info('Reprocessing complete.' . ($dryRun ? ' (dry run — no files were changed)' : ''));
+    }
+}