fix: vidmoly redirect loop, body leak, update error handling, submenu overflow

- Add max redirect depth (10) to Vidmoly _fetch to prevent stack overflow
- Drain undici response body on redirect to prevent connection leaks
- Fix installUpdate unhandled promise rejection in main.js
- Fix context menu submenu viewport overflow with flip-left CSS

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lib/vidmoly-upload.js

@@ -45,7 +45,8 @@ class VidmolyUploader {
   /**
    * Simple GET/POST using built-in fetch (handles redirects)
    */
-  async _fetch(url, opts = {}) {
+  async _fetch(url, opts = {}, _redirectCount = 0) {
+    const MAX_REDIRECTS = 10;
     const headers = {
       'User-Agent': USER_AGENT,
       ...(opts.headers || {})
@@ -64,10 +65,15 @@ class VidmolyUploader {
 
     // Follow redirects manually (to capture cookies at each hop)
     if ([301, 302, 303, 307, 308].includes(res.status)) {
+      // Drain body to prevent connection leak
+      try { await res.text(); } catch {}
+      if (_redirectCount >= MAX_REDIRECTS) {
+        throw new Error('Zu viele Redirects');
+      }
       const location = res.headers.get('location');
       if (location) {
         const nextUrl = new URL(location, url).href;
-        return this._fetch(nextUrl, { ...opts, method: 'GET', body: undefined });
+        return this._fetch(nextUrl, { ...opts, method: 'GET', body: undefined }, _redirectCount + 1);
       }
     }
 
@@ -240,11 +246,13 @@ class VidmolyUploader {
     let resultHtml;
     if ([301, 302, 303].includes(statusCode)) {
       const location = headers && headers.location;
+      // Always drain the original body to prevent connection leak
+      try { await body.text(); } catch {}
       if (location) {
         const resultRes = await this._fetch(new URL(location, uploadUrl).href);
         resultHtml = await resultRes.text();
       } else {
-        resultHtml = await body.text();
+        resultHtml = '';
       }
     } else {
       resultHtml = await body.text();

main.js

@@ -349,17 +349,17 @@ ipcMain.handle('app:check-updates', async () => {
   }
 });
 
-ipcMain.handle('app:install-update', async () => {
-  try {
-    installUpdate((progress) => {
-      if (mainWindow && !mainWindow.isDestroyed()) {
-        mainWindow.webContents.send('app:update-progress', progress);
-      }
-    });
-    return { started: true };
-  } catch (err) {
-    return { error: err.message };
-  }
+ipcMain.handle('app:install-update', () => {
+  installUpdate((progress) => {
+    if (mainWindow && !mainWindow.isDestroyed()) {
+      mainWindow.webContents.send('app:update-progress', progress);
+    }
+  }).catch((err) => {
+    if (mainWindow && !mainWindow.isDestroyed()) {
+      mainWindow.webContents.send('app:update-progress', { stage: 'error', error: err.message });
+    }
+  });
+  return { started: true };
 });
 
 ipcMain.handle('app:abort-update', () => {

renderer/app.js

@@ -342,8 +342,14 @@ function showContextMenu(x, y) {
   if (aotItem) aotItem.textContent = alwaysOnTopState ? 'Immer im Vordergrund ✓' : 'Immer im Vordergrund';
 
   menu.style.display = 'block';
-  menu.style.left = Math.min(x, window.innerWidth - menu.offsetWidth - 5) + 'px';
+  const menuX = Math.min(x, window.innerWidth - menu.offsetWidth - 5);
+  menu.style.left = menuX + 'px';
   menu.style.top = Math.min(y, window.innerHeight - menu.offsetHeight - 5) + 'px';
+
+  // Flip submenus if they would overflow the viewport right edge
+  menu.querySelectorAll('.ctx-submenu-items').forEach(sub => {
+    sub.classList.toggle('flip-left', menuX + menu.offsetWidth + sub.offsetWidth > window.innerWidth);
+  });
 }
 
 function hideContextMenu() {

renderer/styles.css

@@ -314,8 +314,11 @@ body {
   border-radius: 6px;
   padding: 4px 0;
   min-width: 160px;
+  max-width: calc(100vw - 16px);
   box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
 }
+/* Flip submenu to the left when it would overflow the viewport */
+.ctx-submenu-items.flip-left { left: auto; right: 100%; }
 .ctx-submenu:hover .ctx-submenu-items { display: block; }
 
 /* Settings View */