diff --git a/src/lib/components/common/PDFViewer.svelte b/src/lib/components/common/PDFViewer.svelte
index 65720fd871..027d721f56 100644
--- a/src/lib/components/common/PDFViewer.svelte
+++ b/src/lib/components/common/PDFViewer.svelte
@@ -687,6 +687,7 @@
 		tabindex="0"
 		on:scroll={handleScroll}
 		on:wheel|nonpassive={handleWheel}
+		on:dblclick|capture|stopPropagation={() => {}}
 		on:pointerdown={focusViewer}
 		on:keydown={handleKeyDown}
 	>
diff --git a/src/lib/components/common/PptxPreview.svelte b/src/lib/components/common/PptxPreview.svelte
index c2215a709f..2d51fc726b 100644
--- a/src/lib/components/common/PptxPreview.svelte
+++ b/src/lib/components/common/PptxPreview.svelte
@@ -294,10 +294,12 @@
 		{/each}
 	</aside>
 
+	<!-- svelte-ignore a11y_no_static_element_interactions (Preserve native double-click behavior without changing touch zoom.) -->
 	<section
 		bind:this={stageEl}
 		class="min-w-0 min-h-0 overflow-hidden flex items-center justify-center overscroll-contain"
 		on:wheel|nonpassive={handleStageWheel}
+		on:dblclick|capture|stopPropagation={() => {}}
 	>
 		{#if selectedSlide}
 			<div