diff --git a/app/Jobs/CheckVersionUpdateJob.php b/app/Jobs/CheckVersionUpdateJob.php
index c2413c0..0794688 100644
--- a/app/Jobs/CheckVersionUpdateJob.php
+++ b/app/Jobs/CheckVersionUpdateJob.php
@@ -156,7 +156,7 @@ class CheckVersionUpdateJob
 
     private function extractLatestVersion(array $response, bool $enablePrereleases): array
     {
-        if (! $enablePrereleases || ! isset($response[0])) {
+        if (! $enablePrereleases || ! is_array($response) || ! isset($response[0])) {
             return [
                 Arr::get($response, 'tag_name'),
                 $response,
diff --git a/app/Models/DeviceModel.php b/app/Models/DeviceModel.php
index 7142829..f2a757f 100644
--- a/app/Models/DeviceModel.php
+++ b/app/Models/DeviceModel.php
@@ -4,13 +4,11 @@ declare(strict_types=1);
 
 namespace App\Models;
 
-use Illuminate\Database\Eloquent\Casts\Attribute;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
 
 /**
- * @property-read array<string, string> $css_variables
  * @property-read DevicePalette|null $palette
  */
 final class DeviceModel extends Model
@@ -78,37 +76,4 @@ final class DeviceModel extends Model
     {
         return $this->belongsTo(DevicePalette::class, 'palette_id');
     }
-
-    /**
-     * Returns css_variables with --screen-w and --screen-h filled from width/height
-     * when puppeteer_window_size_strategy is v2 and they are not set.
-     *
-     * @return Attribute<array<string, string>, array<string, string>>
-     */
-    protected function cssVariables(): Attribute
-    {
-        /** @var Attribute<array<string, string>, array<string, string>> */
-        return Attribute::get(
-            /** @return array<string, string> */
-            function (mixed $value, array $attributes): array {
-                $vars = is_array($value) ? $value : (is_string($value) ? (json_decode($value, true) ?? []) : []);
-
-                if (config('app.puppeteer_window_size_strategy') !== 'v2') {
-                    return $vars;
-                }
-
-                $width = $attributes['width'] ?? null;
-                $height = $attributes['height'] ?? null;
-
-                if (empty($vars['--screen-w']) && $width !== null && $width !== '') {
-                    $vars['--screen-w'] = is_numeric($width) ? (int) $width.'px' : (string) $width;
-                }
-                if (empty($vars['--screen-h']) && $height !== null && $height !== '') {
-                    $vars['--screen-h'] = is_numeric($height) ? (int) $height.'px' : (string) $height;
-                }
-
-                /** @var array<string, string> $vars */
-                return $vars;
-            });
-    }
 }
diff --git a/app/Services/ImageGenerationService.php b/app/Services/ImageGenerationService.php
index fa6f325..903a493 100644
--- a/app/Services/ImageGenerationService.php
+++ b/app/Services/ImageGenerationService.php
@@ -528,7 +528,7 @@ class ImageGenerationService
             'deviceOrientation' => $deviceOrientation,
             'colorDepth' => $colorDepth,
             'scaleLevel' => $scaleLevel,
-            'cssVariables' => $device->deviceModel?->css_variables ?? [],
+            'cssVariables' => $device->deviceModel?->css_variables,
         ];
 
         // Add plugin name for error screens
diff --git a/storage/app/public/images/default-screens/setup-logo_1024_768_4_90.png b/storage/app/public/images/default-screens/setup-logo_1024_768_4_90.png
deleted file mode 100644
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deleted file mode 100644
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diff --git a/storage/app/public/images/default-screens/setup-logo_1872_1404_12_90.png b/storage/app/public/images/default-screens/setup-logo_1872_1404_12_90.png
deleted file mode 100644
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deleted file mode 100644
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deleted file mode 100644
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deleted file mode 100644
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diff --git a/storage/app/public/images/default-screens/setup-logo_1920_1440_4_90.png b/storage/app/public/images/default-screens/setup-logo_1920_1440_4_90.png
deleted file mode 100644
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diff --git a/storage/app/public/images/default-screens/setup-logo_2480_1860_8_90.png b/storage/app/public/images/default-screens/setup-logo_2480_1860_8_90.png
deleted file mode 100644
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diff --git a/storage/app/public/images/default-screens/setup-logo_960_540_4_0.png b/storage/app/public/images/default-screens/setup-logo_960_540_4_0.png
deleted file mode 100644
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diff --git a/storage/app/public/images/default-screens/sleep_1024_768_4_90.png b/storage/app/public/images/default-screens/sleep_1024_768_4_90.png
deleted file mode 100644
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diff --git a/storage/app/public/images/default-screens/sleep_1648_824_8_0.png b/storage/app/public/images/default-screens/sleep_1648_824_8_0.png
deleted file mode 100644
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diff --git a/storage/app/public/images/default-screens/sleep_1872_1404_12_90.png b/storage/app/public/images/default-screens/sleep_1872_1404_12_90.png
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diff --git a/storage/app/public/images/default-screens/sleep_800_480_1_0.png b/storage/app/public/images/default-screens/sleep_800_480_1_0.png
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diff --git a/storage/app/public/images/default-screens/sleep_800_480_2_0.png b/storage/app/public/images/default-screens/sleep_800_480_2_0.png
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diff --git a/storage/app/public/images/default-screens/sleep_960_540_4_0.png b/storage/app/public/images/default-screens/sleep_960_540_4_0.png
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diff --git a/tests/Feature/ScreenCssVariablesTest.php b/tests/Feature/ScreenCssVariablesTest.php
deleted file mode 100644
index f5bfc12..0000000
--- a/tests/Feature/ScreenCssVariablesTest.php
+++ /dev/null
@@ -1,100 +0,0 @@
-<?php
-
-use App\Models\Device;
-use App\Models\DeviceModel;
-use Illuminate\Support\Facades\Config;
-
-beforeEach(function (): void {
-    Config::set('app.puppeteer_window_size_strategy', 'v2');
-});
-
-test('screen component outputs :root with --screen-w and --screen-h when cssVariables are passed', function (): void {
-    $html = view('trmnl-layouts.single', [
-        'slot' => '<div>test</div>',
-        'cssVariables' => [
-            '--screen-w' => '800px',
-            '--screen-h' => '480px',
-        ],
-    ])->render();
-
-    expect($html)->toContain(':root');
-    expect($html)->toContain('--screen-w: 800px');
-    expect($html)->toContain('--screen-h: 480px');
-});
-
-test('DeviceModel css_variables attribute merges --screen-w and --screen-h from dimensions when not set', function (): void {
-    $deviceModel = DeviceModel::factory()->create([
-        'width' => 800,
-        'height' => 480,
-        'css_variables' => null,
-    ]);
-
-    $vars = $deviceModel->css_variables;
-
-    expect($vars)->toHaveKey('--screen-w', '800px');
-    expect($vars)->toHaveKey('--screen-h', '480px');
-});
-
-test('DeviceModel css_variables attribute does not override --screen-w and --screen-h when already set', function (): void {
-    $deviceModel = DeviceModel::factory()->create([
-        'width' => 800,
-        'height' => 480,
-        'css_variables' => [
-            '--screen-w' => '1200px',
-            '--screen-h' => '900px',
-        ],
-    ]);
-
-    $vars = $deviceModel->css_variables;
-
-    expect($vars['--screen-w'])->toBe('1200px');
-    expect($vars['--screen-h'])->toBe('900px');
-});
-
-test('DeviceModel css_variables attribute fills only missing --screen-w or --screen-h from dimensions', function (): void {
-    $deviceModel = DeviceModel::factory()->create([
-        'width' => 800,
-        'height' => 480,
-        'css_variables' => [
-            '--screen-w' => '640px',
-        ],
-    ]);
-
-    $vars = $deviceModel->css_variables;
-
-    expect($vars['--screen-w'])->toBe('640px');
-    expect($vars['--screen-h'])->toBe('480px');
-});
-
-test('DeviceModel css_variables attribute returns raw vars when strategy is not v2', function (): void {
-    Config::set('app.puppeteer_window_size_strategy', 'v1');
-
-    $deviceModel = DeviceModel::factory()->create([
-        'width' => 800,
-        'height' => 480,
-        'css_variables' => ['--custom' => 'value'],
-    ]);
-
-    $vars = $deviceModel->css_variables;
-
-    expect($vars)->toBe(['--custom' => 'value']);
-});
-
-test('device model css_variables are available via device relationship for rendering', function (): void {
-    Config::set('app.puppeteer_window_size_strategy', 'v2');
-
-    $deviceModel = DeviceModel::factory()->create([
-        'width' => 800,
-        'height' => 480,
-        'css_variables' => null,
-    ]);
-    $device = Device::factory()->create([
-        'device_model_id' => $deviceModel->id,
-    ]);
-    $device->load('deviceModel');
-
-    $vars = $device->deviceModel?->css_variables ?? [];
-
-    expect($vars)->toHaveKey('--screen-w', '800px');
-    expect($vars)->toHaveKey('--screen-h', '480px');
-});