Keep PDF previews inside modal

js/main.js

@@ -552,21 +552,14 @@ class App {
 
         const pdfBlob = await response.blob();
         this.currentPreviewObjectUrl = URL.createObjectURL(pdfBlob);
-        const googleViewerUrl = `https://docs.google.com/gview?url=${encodeURIComponent(`${url}?download=true`)}&embedded=true`;
         body.innerHTML = `
           <div class="preview-pdf-wrap" style="width:100%; height:100%; display:flex; flex-direction:column;">
-            <embed
+            <iframe
               src="${this.currentPreviewObjectUrl}"
               type="application/pdf"
-              width="100%"
-              height="100%"
-              style="flex:1; border:0;"
-            />
-            <div style="padding:12px 16px; border-top:1px solid rgba(0,0,0,0.06); display:flex; justify-content:flex-end;">
-              <a href="${googleViewerUrl}" target="_blank" rel="noopener noreferrer" class="btn-secondary" style="text-decoration:none;">
-                Open in Google Viewer
-              </a>
-            </div>
+              class="preview-iframe"
+              title="${file.name} preview"
+            ></iframe>
           </div>`;
       } catch (err) {
         body.innerHTML = this.previewFallback(