Constrain admin plugin logo size to recommended 256x256 dimensions

Use inline styles instead of Tailwind classes for the logo preview in
the admin plugin edit form, since Filament's CSS build doesn't include
classes from inline HTML strings.

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

Author: simonhamp

app/Filament/Resources/PluginResource.php

@@ -52,7 +52,7 @@ public static function form(Schema $schema): Schema
                         Forms\Components\Placeholder::make('logo_preview')
                             ->label('Logo')
                             ->content(fn (?Plugin $record) => $record?->hasLogo()
-                                ? new HtmlString('<img src="'.e($record->getLogoUrl()).'" alt="Logo" class="w-16 h-16 rounded-lg object-cover" />')
+                                ? new HtmlString('<img src="'.e($record->getLogoUrl()).'" alt="Logo" style="max-width: 256px; max-height: 256px; border-radius: 0.5rem; object-fit: cover;" />')
                                 : 'No logo')
                             ->visible(fn (?Plugin $record) => $record !== null),