diff --git a/src/lib/components/chat/ChatControls.svelte b/src/lib/components/chat/ChatControls.svelte
index f9c68c2350..f7f9396e81 100644
--- a/src/lib/components/chat/ChatControls.svelte
+++ b/src/lib/components/chat/ChatControls.svelte
@@ -492,7 +492,7 @@
 										onClose={() => showControls.set(false)}
 									/>
 								{:else if activeTab === 'files' && $selectedTerminalId}
-									<FileNav onAttach={handleTerminalAttach} />
+									<FileNav onAttach={handleTerminalAttach} overlay={dragged} />
 								{:else}
 									<Controls embed={true} {models} bind:chatFiles bind:params />
 								{/if}
diff --git a/src/lib/components/chat/FileNav.svelte b/src/lib/components/chat/FileNav.svelte
index 07728d1499..2e32ddb0c8 100644
--- a/src/lib/components/chat/FileNav.svelte
+++ b/src/lib/components/chat/FileNav.svelte
@@ -40,6 +40,7 @@
 	const i18n = getContext('i18n');
 
 	export let onAttach: ((blob: Blob, name: string, contentType: string) => void) | null = null;
+	export let overlay = false;
 
 	// ── Directory state ──────────────────────────────────────────────────
 	let currentPath = savedPath;
@@ -658,6 +659,7 @@
 					{fileImageUrl}
 					{filePdfData}
 					{fileContent}
+					{overlay}
 					onSave={async (content) => {
 						const terminal = selectedTerminal;
 						if (!terminal || !selectedFile) return;
diff --git a/src/lib/components/chat/FileNav/FilePreview.svelte b/src/lib/components/chat/FileNav/FilePreview.svelte
index 92be9e42d6..c95d909ee2 100644
--- a/src/lib/components/chat/FileNav/FilePreview.svelte
+++ b/src/lib/components/chat/FileNav/FilePreview.svelte
@@ -17,6 +17,8 @@
 	export let filePdfData: ArrayBuffer | null = null;
 	export let fileContent: string | null = null;
 
+	export let overlay = false;
+
 	export let onSave: ((content: string) => Promise<void>) | null = null;
 
 	export let editing = false;
@@ -170,6 +172,9 @@
 		<PDFViewer bind:this={pdfViewerRef} data={filePdfData} className="w-full h-full" />
 	{:else if fileContent !== null}
 		{#if isHtml && !showRaw}
+			{#if overlay}
+				<div class="absolute top-0 left-0 right-0 bottom-0 z-10"></div>
+			{/if}
 			<iframe
 				srcdoc={fileContent}
 				sandbox="allow-scripts allow-downloads{($settings?.iframeSandboxAllowForms ?? false)