Fix translation fallback: apply only on frontend, not in admin editor

- Add translationFallbackEnabled() flag to MarbleManager
- Enable fallback in Marble::routes() handler (frontend only)
- Non-translatable fields still always fall back to primary language
- Translatable fields only fall back when frontend flag is active
- Fixes admin editor showing EN values in DE/SK fields

Author: Phillip Dornauer

src/MarbleManager.php

@@ -17,6 +17,7 @@ class MarbleManager
     protected FieldTypeRegistry $registry;
     protected ?int $currentLanguageId = null;
     protected ?int $primaryLanguageId = null;
+    protected bool $translationFallback = false;
 
     public function __construct(FieldTypeRegistry $registry)
     {
@@ -102,6 +103,16 @@ public function primaryLanguageId(): int
         return $this->primaryLanguageId;
     }
 
+    public function enableTranslationFallback(): void
+    {
+        $this->translationFallback = true;
+    }
+
+    public function translationFallbackEnabled(): bool
+    {
+        return $this->translationFallback;
+    }
+
     // -------------------------------------------------------------------------
     // Item API (convenience, cached)
     // -------------------------------------------------------------------------
@@ -185,6 +196,7 @@ public function routes(callable $handler, string $prefix = ''): void
         $pattern = $pattern ? $pattern . '/{path?}' : '{path?}';
 
         Route::get($pattern, function (string $path = '') use ($handler, $prefix) {
+            $this->enableTranslationFallback();
             $fullPath = ($prefix ? rtrim($prefix, '/') : '') . '/' . ltrim($path, '/');
             $item = $this->resolveOrFail($fullPath);
             return $handler($item);

src/Models/Item.php

@@ -456,7 +456,6 @@ protected function loadValuesForLanguage(int $languageId): void
             ->get()
             ->keyBy('blueprint_field_id');
 
-        // For non-translatable fields, also load the primary language values
         $primaryLanguageId = Marble::primaryLanguageId();
 
         if ($languageId !== $primaryLanguageId) {
@@ -465,15 +464,19 @@ protected function loadValuesForLanguage(int $languageId): void
                 ->get()
                 ->keyBy('blueprint_field_id');
 
-            // Fill in from primary language:
-            // - non-translatable fields: always
-            // - translatable fields: when no row exists, or the row is empty
             foreach ($this->blueprint->fields as $field) {
                 if (!isset($primaryValues[$field->id])) {
                     continue;
                 }
                 $existing = $values[$field->id] ?? null;
-                if (!$existing || $field->fieldTypeInstance()->isEmpty($existing->value)) {
+                $isEmpty  = !$existing || $field->fieldTypeInstance()->isEmpty($existing->value);
+
+                // Non-translatable fields always come from primary language.
+                // Translatable fields fall back only on the frontend (not in the admin editor,
+                // where empty fields should stay empty so translators see what needs doing).
+                if (!$field->translatable && $isEmpty) {
+                    $values[$field->id] = $primaryValues[$field->id];
+                } elseif ($field->translatable && $isEmpty && Marble::translationFallbackEnabled()) {
                     $values[$field->id] = $primaryValues[$field->id];
                 }
             }

src/Resources/views/workflow/index.blade.php

@@ -3,20 +3,21 @@
 @php $prefix = config('marble.route_prefix', 'admin'); @endphp
 
 @section('content')
-    <h1>{{ trans('marble::admin.workflows') }}</h1>
-
+    <div class="clearfix">
+        <h1 class="pull-left">{{ trans('marble::admin.workflows') }}</h1>
+        <div class="pull-right">
+            <form method="POST" action="{{ url("{$prefix}/workflow/create") }}">
+                @csrf
+                <button type="submit" class="btn btn-success btn-sm">
+                    @include('marble::components.famicon', ['name' => 'add'])
+                    {{ trans('marble::admin.add_workflow') }}
+                </button>
+            </form>
+        </div>
+    </div>
     <div class="main-box">
-        <header class="main-box-header clearfix">
+        <header class="main-box-header">
             <h2>{{ trans('marble::admin.workflows') }}</h2>
-            <div class="pull-right" style="padding:10px">
-                <form method="POST" action="{{ url("{$prefix}/workflow/create") }}">
-                    @csrf
-                    <button type="submit" class="btn btn-success btn-sm">
-                        @include('marble::components.famicon', ['name' => 'add'])
-                        {{ trans('marble::admin.add_workflow') }}
-                    </button>
-                </form>
-            </div>
         </header>
         <div class="main-box-body clearfix">
             @if($workflows->isEmpty())