diff --git a/codemagic.yaml b/codemagic.yaml
index 18608c5..f289256 100644
--- a/codemagic.yaml
+++ b/codemagic.yaml
@@ -54,7 +54,7 @@ workflows:
           echo "iOS project layout:"; ls -la ios/App
           # ── Diagnose local-plugin SPM wiring (the regression: our file: plugins didn't function at runtime) ──
           echo "=== local plugins in node_modules — symlink vs copy, and is Package.swift present? ==="
-          for p in native-call media-library audio-route share-inbox; do
+          for p in native-call media-library audio-route share-inbox file-opener; do
             echo "-- $p --"; ls -ld "node_modules/$p" 2>/dev/null || echo "  (dir missing)"
             ( ls "node_modules/$p/Package.swift" >/dev/null 2>&1 && echo "  Package.swift PRESENT" ) || echo "  Package.swift MISSING"
           done
diff --git a/mobile/package.json b/mobile/package.json
index 8154014..cea1aff 100644
--- a/mobile/package.json
+++ b/mobile/package.json
@@ -11,6 +11,7 @@
   },
   "dependencies": {
     "audio-route": "file:plugins/audio-route",
+    "file-opener": "file:plugins/file-opener",
     "media-library": "file:plugins/media-library",
     "native-call": "file:plugins/native-call",
     "share-inbox": "file:plugins/share-inbox",
diff --git a/mobile/plugins/file-opener/FileOpener.podspec b/mobile/plugins/file-opener/FileOpener.podspec
new file mode 100644
index 0000000..ac764c7
--- /dev/null
+++ b/mobile/plugins/file-opener/FileOpener.podspec
@@ -0,0 +1,22 @@
+require 'json'
+
+package = JSON.parse(File.read(File.join(__dir__, 'package.json')))
+
+Pod::Spec.new do |s|
+  # NOTE: the pod name MUST be 'FileOpener' (PascalCase of the npm package name 'file-opener').
+  # `cap sync` writes `pod 'FileOpener', :path => '../../plugins/file-opener'` into the generated Podfile,
+  # and CocoaPods then looks for a file literally named FileOpener.podspec whose s.name is 'FileOpener'.
+  # Any other name → "No podspec found for `FileOpener`" and pod install fails. (Same trap that broke the
+  # AudioRoute build — see mobile/plugins/audio-route/AudioRoute.podspec.)
+  s.name = 'FileOpener'
+  s.version = package['version']
+  s.summary = package['description']
+  s.license = package['license']
+  s.homepage = 'https://bizgaze.com'
+  s.author = 'BizGaze'
+  s.source = { :git => 'https://bizgaze.com/file-opener.git', :tag => s.version.to_s }
+  s.source_files = 'ios/Sources/**/*.{swift,h,m}'
+  s.ios.deployment_target = '15.0'
+  s.dependency 'Capacitor'
+  s.swift_version = '5.1'
+end
diff --git a/mobile/plugins/file-opener/Package.swift b/mobile/plugins/file-opener/Package.swift
new file mode 100644
index 0000000..f8ac396
--- /dev/null
+++ b/mobile/plugins/file-opener/Package.swift
@@ -0,0 +1,22 @@
+// swift-tools-version: 5.9
+import PackageDescription
+
+let package = Package(
+    name: "FileOpener",
+    platforms: [.iOS(.v15)],
+    products: [
+        .library(name: "FileOpener", targets: ["FileOpenerPlugin"])
+    ],
+    dependencies: [
+        .package(url: "https://github.com/ionic-team/capacitor-swift-pm.git", from: "8.0.0")
+    ],
+    targets: [
+        .target(
+            name: "FileOpenerPlugin",
+            dependencies: [
+                .product(name: "Capacitor", package: "capacitor-swift-pm"),
+                .product(name: "Cordova", package: "capacitor-swift-pm")
+            ],
+            path: "ios/Sources/FileOpenerPlugin")
+    ]
+)
diff --git a/mobile/plugins/file-opener/ios/Sources/FileOpenerPlugin/FileOpenerPlugin.swift b/mobile/plugins/file-opener/ios/Sources/FileOpenerPlugin/FileOpenerPlugin.swift
new file mode 100644
index 0000000..17180a7
--- /dev/null
+++ b/mobile/plugins/file-opener/ios/Sources/FileOpenerPlugin/FileOpenerPlugin.swift
@@ -0,0 +1,71 @@
+import Foundation
+import Capacitor
+import QuickLook
+
+// Previews an already-downloaded file with iOS Quick Look — the native "look at this file" surface: swipe,
+// pinch-zoom, print, and its own share button. Registered by cap sync as window.Capacitor.Plugins.FileOpener.
+//
+// WHY A PLUGIN: the app loads its UI from a REMOTE origin (remote.bizgaze.com), so it cannot open a local
+// file:// URL in the WebView (cross-origin / capacitor local-serving isn't on this origin). @capacitor/share
+// only offers the share SHEET ("open in another app"), not a preview. Only QLPreviewController, presented
+// from native code, gives a real in-app preview. Quick Look picks the renderer from the file extension, which
+// is why the web layer now saves downloads with a correct extension (see bzEnsureExt in home.html).
+@objc(FileOpenerPlugin)
+public class FileOpenerPlugin: CAPPlugin, CAPBridgedPlugin {
+    public let identifier = "FileOpenerPlugin"
+    public let jsName = "FileOpener"
+    public let pluginMethods: [CAPPluginMethod] = [
+        CAPPluginMethod(name: "preview", returnType: CAPPluginReturnPromise)
+    ]
+
+    // QLPreviewController holds its dataSource weakly, so we must keep a strong reference alive for the
+    // lifetime of the presented preview — otherwise it deallocates and the preview shows blank.
+    private var dataSource: QLDataSource?
+
+    @objc func preview(_ call: CAPPluginCall) {
+        guard let raw = call.getString("path"), !raw.isEmpty else {
+            call.reject("path is required"); return
+        }
+        let url = FileOpenerPlugin.fileURL(from: raw)
+        guard FileManager.default.fileExists(atPath: url.path) else {
+            call.reject("file not found: \(url.path)"); return
+        }
+        DispatchQueue.main.async {
+            let ds = QLDataSource(url: url)
+            self.dataSource = ds
+            let controller = QLPreviewController()
+            controller.dataSource = ds
+            controller.modalPresentationStyle = .fullScreen
+            guard let base = self.bridge?.viewController else {
+                call.reject("no view controller to present from"); return
+            }
+            // Present on top of whatever is already showing (a modal, another sheet) so it never fails silently.
+            var presenter = base
+            while let top = presenter.presentedViewController { presenter = top }
+            presenter.present(controller, animated: true) {
+                call.resolve(["ok": true])
+            }
+        }
+    }
+
+    // Accepts either a file:// URI (what Filesystem.writeFile returns) or a bare absolute path.
+    private static func fileURL(from raw: String) -> URL {
+        if raw.hasPrefix("file://") {
+            if let u = URL(string: raw) { return u }
+            // Un-encoded spaces make URL(string:) fail — percent-encode and retry before giving up.
+            let encoded = raw.addingPercentEncoding(withAllowedCharacters: .urlPathAllowed) ?? raw
+            if let u = URL(string: encoded) { return u }
+        }
+        return URL(fileURLWithPath: raw)
+    }
+}
+
+// Single-item data source. NSURL already conforms to QLPreviewItem.
+final class QLDataSource: NSObject, QLPreviewControllerDataSource {
+    private let url: URL
+    init(url: URL) { self.url = url }
+    func numberOfPreviewItems(in controller: QLPreviewController) -> Int { 1 }
+    func previewController(_ controller: QLPreviewController, previewItemAt index: Int) -> QLPreviewItem {
+        return url as NSURL
+    }
+}
diff --git a/mobile/plugins/file-opener/package.json b/mobile/plugins/file-opener/package.json
new file mode 100644
index 0000000..d123655
--- /dev/null
+++ b/mobile/plugins/file-opener/package.json
@@ -0,0 +1,27 @@
+{
+  "name": "file-opener",
+  "version": "1.0.0",
+  "description": "Preview a downloaded file with native iOS Quick Look for Biz Connect",
+  "main": "dist/plugin.cjs.js",
+  "module": "dist/esm/index.js",
+  "types": "dist/esm/index.d.ts",
+  "author": "BizGaze",
+  "license": "MIT",
+  "files": [
+    "dist/",
+    "ios/",
+    "FileOpener.podspec",
+    "Package.swift"
+  ],
+  "capacitor": {
+    "ios": {
+      "src": "ios"
+    }
+  },
+  "devDependencies": {
+    "@capacitor/core": "^8.0.0"
+  },
+  "peerDependencies": {
+    "@capacitor/core": "^8.0.0"
+  }
+}
diff --git a/server/public/home.html b/server/public/home.html
index d3c27ab..ce7dfba 100644
--- a/server/public/home.html
+++ b/server/public/home.html
@@ -2809,6 +2809,23 @@ function bzMimeFromName(n){
   if(/^(mp3|wav|m4a|aac|ogg|opus)$/.test(e)) return 'audio/'+e;
   return '';
 }
+// Map a MIME type to a file extension. Needed because some downloads arrive without one — the lightbox
+// hands us a bare "/files/<id>" (no name, no extension) — and a file saved with no extension is one that
+// neither the Photos app will accept nor the Files app / Quick Look can open.
+function bzExtForMime(mime){
+  const m=String(mime||'').toLowerCase().split(';')[0].trim();
+  const map={'image/jpeg':'jpg','image/jpg':'jpg','image/png':'png','image/gif':'gif','image/webp':'webp','image/heic':'heic','image/heif':'heif','image/bmp':'bmp','image/svg+xml':'svg',
+    'video/mp4':'mp4','video/quicktime':'mov','video/webm':'webm','video/3gpp':'3gp','video/x-matroska':'mkv','video/x-msvideo':'avi',
+    'audio/mpeg':'mp3','audio/mp4':'m4a','audio/aac':'aac','audio/wav':'wav','audio/x-wav':'wav','audio/ogg':'ogg','audio/opus':'opus',
+    'application/pdf':'pdf','application/zip':'zip','text/plain':'txt'};
+  if(map[m]) return map[m];
+  return (m.split('/')[1]||'').replace(/\+.*$/,'').replace(/[^a-z0-9]+/g,'').slice(0,5); // e.g. "svg+xml"→"svg"
+}
+function bzEnsureExt(name, mime){
+  const n=String(name||'file');
+  if(/\.[a-z0-9]{1,6}$/i.test(n)) return n;   // already carries an extension
+  const ext=bzExtForMime(mime); return ext ? n+'.'+ext : n;
+}
 function bzLibSrc(r){ try{ return r&&r.uri ? window.Capacitor.convertFileSrc(r.uri) : null; }catch(_){ return null; } }
 function bzPhotosOn(){ try{ return localStorage.getItem('bzc.photos')!=='off'; }catch(_){ return true; } }
 // Also put saved photos/videos in the Photos app, in a "Connect" album — the way WhatsApp does. The Files
@@ -2889,11 +2906,14 @@ function bzSyncFileTiles(only){
     el.title = saved ? 'Open' : 'Download to this device';
   });
 }
-// Open an already-downloaded file via the iOS share/preview sheet (Quick Look / open in another app). We have
-// no dedicated file-opener plugin, so @capacitor/share on the local file URI is the reliable "open".
+// Open an already-downloaded file. Prefer a native Quick Look PREVIEW (the FileOpener plugin) — that's the iOS
+// "look at this file" surface (swipe, pinch, print, its own share button), which is what people expect when
+// they tap a file. Only if the preview plugin isn't in this build do we fall back to the share sheet (which
+// offers "open in another app"), then to a new browser tab.
 async function bzOpenFile(rec, name){
   const uri=rec&&rec.uri; if(!uri) return;
   const P=window.Capacitor&&window.Capacitor.Plugins;
+  if(P&&P.FileOpener&&P.FileOpener.preview){ try{ await P.FileOpener.preview({ path:uri }); return; }catch(_){ /* fall through to the share sheet */ } }
   if(P&&P.Share){ try{ await P.Share.share({ title:name||'File', url:uri }); }catch(_){} return; } // catch = user cancelled
   try{ const src=bzLibSrc(rec); if(src) window.open(src, '_blank'); }catch(_){}
 }
@@ -2901,13 +2921,19 @@ async function nativeSaveFile(url, name, meta){
   const C=window.Capacitor, P=C&&C.Plugins; const Fs=P&&P.Filesystem;
   if(!Fs) return false;
   const id=(meta&&meta.id) || (String(url).split('?')[0].split('/').pop()||'');
-  const fname=(String(name||url.split('/').pop()||'file').replace(/[\/\\:*?"<>|\r\n]+/g,'_')).slice(0,120)||'file';
-  const mime=(meta&&meta.mime)||bzMimeFromName(fname);
+  let fname=(String(name||url.split('/').pop()||'file').replace(/[\/\\:*?"<>|\r\n]+/g,'_')).slice(0,120)||'file';
+  let mime=(meta&&meta.mime)||bzMimeFromName(fname);
   const onPct=(meta&&meta.onPct)||null;
   const box=onPct?null:bzDlShow(fname);   // a video reports % inside its own tile, so no floating chip
-  const lpath=bzLibPath(fname, mime, id);
   try{
     const res=await fetch(url, {credentials:'include'}); if(!res.ok) throw new Error('http '+res.status);
+    // The lightbox / avatar downloads hand us a bare "/files/<id>" — no name, no extension, no mime — so an
+    // image was landing in the generic "Files" folder as an extension-less blob and never reaching Photos.
+    // Trust the server's Content-Type here, then give the file a real extension, so it goes to the right
+    // folder, opens in Quick Look, AND qualifies for the Photos save below.
+    if(!mime){ mime=((res.headers.get('Content-Type')||'').split(';')[0]||'').trim().toLowerCase(); }
+    fname=bzEnsureExt(fname, mime);
+    const lpath=bzLibPath(fname, mime, id);
     const total=+(res.headers.get('Content-Length')||0);
     let uri=null, wrote=0;
     if(res.body && res.body.getReader){