fix: preserve type field during editing

- Remove type field from mutateFormDataBeforeFill to keep it in form data
- Add mutateFormDataBeforeSave to ensure type is preserved during save
- Prevents type from becoming null when editing files/folders
- Type is now immutable after creation but preserved during edits

Author: scott grayson

src/Resources/Pages/EditLibraryItem.php

@@ -19,11 +19,10 @@ protected function getHeaderActions(): array
 
     protected function mutateFormDataBeforeFill(array $data): array
     {
-        // Remove fields that shouldn't be editable
-        unset($data['type']);
+        // Remove fields that shouldn't be editable, but preserve type
         unset($data['parent_id']);
         unset($data['created_by']);
-
+        
         return $data;
     }
 
@@ -38,4 +37,12 @@ protected function getForms(): array
             ),
         ];
     }
+
+    protected function mutateFormDataBeforeSave(array $data): array
+    {
+        // Preserve the original type - don't let it be changed
+        $data['type'] = $this->getRecord()->type;
+        
+        return $data;
+    }
 }

src/Resources/Pages/ListLibraryItems.php

@@ -84,17 +84,17 @@ protected function getHeaderActions(): array
             ])
             ->action(function (array $data): void {
                 $filePath = $data['file'];
-                
+
                 // Extract filename from the path
                 $fileName = basename($filePath);
-                
+
                 LibraryItem::create([
                     'name' => $fileName,
                     'type' => 'file',
                     'parent_id' => $this->parentId,
                     'created_by' => auth()->user()?->id,
                 ]);
-                
+
                 $this->redirect(static::getResource()::getUrl('index', $this->parentId ? ['parent' => $this->parentId] : []));
             });