implement task bar progress

closes #1511

src/main/index.ts

@@ -406,3 +406,5 @@ export function quitApp() {
 }
 
 export const hasDisabledNetworking = () => !!disableNetworking;
+
+export const setProgressBar = (v: number) => mainWindow?.setProgressBar(v);

src/renderer/src/App.tsx

@@ -97,7 +97,7 @@ const { exists } = window.require('fs-extra');
 const { lstat } = window.require('fs/promises');
 const { parse: parsePath, join: pathJoin, basename, dirname } = window.require('path');
 
-const { focusWindow, hasDisabledNetworking, quitApp, pathToFileURL } = window.require('@electron/remote').require('./index.js');
+const { focusWindow, hasDisabledNetworking, quitApp, pathToFileURL, setProgressBar } = window.require('@electron/remote').require('./index.js');
 
 
 const videoStyle: CSSProperties = { width: '100%', height: '100%', objectFit: 'contain' };
@@ -191,6 +191,8 @@ function App() {
 
   useEffect(() => setDocumentTitle({ filePath, working: working?.text, cutProgress }), [cutProgress, filePath, working?.text]);
 
+  useEffect(() => setProgressBar(cutProgress ?? -1), [cutProgress]);
+
   const zoom = Math.floor(zoomUnrounded);
 
   const durationSafe = isDurationValid(duration) ? duration : 1;