refactor: enhance drag and drop test to verify state changes and element visibility

Author: MrPunyapal

tests/Browser/Playwright/Page/DragAndDropTest.php

@@ -7,12 +7,12 @@
         $this->page = $this->page('/test/frame-tests');
     });
 
-    it('performs drag and drop operations', function (): void {
-        // Drag and drop should complete without error
-        $this->page->dragAndDrop('#draggable', '#droppable');
+    it('performs drag and drop operations and verifies state changes', function (): void {
+        $this->page->waitForSelector('#draggable');
+        $this->page->waitForSelector('#droppable');
+        expect($this->page->textContent('#droppable'))->toContain('Drop Zone');
 
-        // Verify both elements still exist and are visible (drag and drop completed)
-        expect($this->page->isVisible('#draggable'))->toBeTrue();
-        expect($this->page->isVisible('#droppable'))->toBeTrue();
+        $this->page->dragAndDrop('#draggable', '#droppable');
+        expect($this->page->textContent('#droppable'))->toBe('Element dropped!');
     });
 });