test(upgrade): add mount tests for cached and fallback versions

Covers Upgrade Livewire component mount behavior for:
- initializing latest version from cached versions data
- falling back to 0.0.0 when versions cache is unavailable

tests/Feature/UpgradeComponentTest.php

@@ -0,0 +1,37 @@
+<?php
+
+use App\Livewire\Upgrade;
+use Illuminate\Support\Facades\Cache;
+use Livewire\Livewire;
+
+it('initializes latest version during mount from cached versions data', function () {
+    config(['constants.coolify.version' => '4.0.0-beta.998']);
+
+    Cache::shouldReceive('remember')
+        ->once()
+        ->with('coolify:versions:all', 3600, Mockery::type(\Closure::class))
+        ->andReturn([
+            'coolify' => [
+                'v4' => [
+                    'version' => '4.0.0-beta.999',
+                ],
+            ],
+        ]);
+
+    Livewire::test(Upgrade::class)
+        ->assertSet('currentVersion', '4.0.0-beta.998')
+        ->assertSet('latestVersion', '4.0.0-beta.999')
+        ->set('isUpgradeAvailable', true)
+        ->assertSee('4.0.0-beta.998')
+        ->assertSee('4.0.0-beta.999');
+});
+
+it('falls back to 0.0.0 during mount when cached versions data is unavailable', function () {
+    Cache::shouldReceive('remember')
+        ->once()
+        ->with('coolify:versions:all', 3600, Mockery::type(\Closure::class))
+        ->andReturn(null);
+
+    Livewire::test(Upgrade::class)
+        ->assertSet('latestVersion', '0.0.0');
+});