diff --git a/app/Livewire/Versions/Index.php b/app/Livewire/Versions/Index.php
index 57d5913..621a56f 100644
--- a/app/Livewire/Versions/Index.php
+++ b/app/Livewire/Versions/Index.php
@@ -563,6 +563,32 @@ class Index extends Component
         ));
     }
 
+    /**
+     * The repository shown on the "Projekt" card. Only the dev/release-control box surfaces its
+     * actual update source (which may be the private Gitea); EVERY other install — staging or
+     * stable — links the public open-core repo only, so a non-dev server can never expose a private
+     * source regardless of how its CLUSEV_REPOSITORY happens to be set. (The update SOURCE is still
+     * config('clusev.repository'); this only governs the displayed project link.)
+     *
+     * release_controls=true is the dev-box invariant: it also gates the dev-only /release page + the
+     * host release bridge, so a staging/stable box never has it on — and even if it did, that box's
+     * CLUSEV_REPOSITORY is the public repo anyway (it pulls from public). On a non-dev box the link
+     * is built from the public slug ONLY, and a malformed slug (empty / slashed / a full URL) falls
+     * back to the canonical public repo — never to a private host.
+     */
+    private function projectUrl(): string
+    {
+        if (config('clusev.release_controls')) {
+            return (string) config('clusev.repository');
+        }
+        $slug = trim((string) config('clusev.public_slug'), '/');
+        if (! preg_match('#^[A-Za-z0-9._-]+/[A-Za-z0-9._-]+$#', $slug)) {
+            $slug = 'clusev/clusev';
+        }
+
+        return 'https://github.com/'.$slug;
+    }
+
     public function render()
     {
         $releases = $this->releases();
@@ -602,7 +628,7 @@ class Index extends Component
         return view('livewire.versions.index', [
             'version' => config('clusev.version'),
             'channel' => $this->channel(),
-            'repository' => config('clusev.repository'),
+            'repository' => $this->projectUrl(),
             'license' => config('clusev.license'),
             'build' => $this->build(),
             'seriesList' => $seriesList,
diff --git a/tests/Feature/VersionUpdateCheckTest.php b/tests/Feature/VersionUpdateCheckTest.php
index c7645b2..f1f023c 100644
--- a/tests/Feature/VersionUpdateCheckTest.php
+++ b/tests/Feature/VersionUpdateCheckTest.php
@@ -12,6 +12,7 @@ use Illuminate\Support\Facades\Cache;
 use Illuminate\Support\Facades\Http;
 use Illuminate\Support\Facades\RateLimiter;
 use Livewire\Livewire;
+use PHPUnit\Framework\Attributes\DataProvider;
 use Tests\TestCase;
 
 /**
@@ -304,4 +305,60 @@ class VersionUpdateCheckTest extends TestCase
             'the per-user throttle must block the sentinel write',
         );
     }
+
+    // ── Project link: only the dev box may expose its (possibly private) source ───
+
+    public function test_dev_box_shows_its_actual_repository_on_the_project_card(): void
+    {
+        config()->set('clusev.release_controls', true); // the dev / release-control box
+        Http::fake();
+
+        // setUp() set clusev.repository to the (Gitea-style) source — the dev box may surface it.
+        Livewire::test(Index::class)->assertViewHas('repository', self::REPO);
+    }
+
+    public function test_non_dev_install_only_links_the_public_repo(): void
+    {
+        config()->set('clusev.release_controls', false); // staging / stable
+        config()->set('clusev.public_slug', 'clusev/clusev');
+        Http::fake();
+
+        // Even though clusev.repository points at the private Gitea source (setUp), the project card
+        // must link ONLY the public repo — a non-dev server never exposes the private source.
+        Livewire::test(Index::class)->assertViewHas('repository', 'https://github.com/clusev/clusev');
+    }
+
+    public function test_non_dev_project_link_follows_the_public_slug(): void
+    {
+        config()->set('clusev.release_controls', false);
+        config()->set('clusev.public_slug', 'acme/pub');
+        Http::fake();
+
+        Livewire::test(Index::class)->assertViewHas('repository', 'https://github.com/acme/pub');
+    }
+
+    /**
+     * A malformed public_slug must never produce a private/garbage link — it falls back to the
+     * canonical public repo. Covers empty, surrounding slashes, and a slug mistakenly set to a full
+     * (possibly private) URL.
+     */
+    #[DataProvider('malformedSlugs')]
+    public function test_non_dev_project_link_falls_back_for_a_malformed_slug(string $slug, string $expected): void
+    {
+        config()->set('clusev.release_controls', false);
+        config()->set('clusev.public_slug', $slug);
+        Http::fake();
+
+        Livewire::test(Index::class)->assertViewHas('repository', $expected);
+    }
+
+    /** @return array<string,array{0:string,1:string}> */
+    public static function malformedSlugs(): array
+    {
+        return [
+            'empty' => ['', 'https://github.com/clusev/clusev'],
+            'surrounding slashes' => ['/acme/pub/', 'https://github.com/acme/pub'],
+            'full private url' => ['https://gitea.internal/o/repo', 'https://github.com/clusev/clusev'],
+        ];
+    }
 }