feat: inject Sanctum branding to replace Revolt logo in webview

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

src/native/window.ts

@@ -142,7 +142,10 @@ export function createMainWindow() {
   });
 
   // send the config
-  mainWindow.webContents.on("did-finish-load", () => config.sync());
+  mainWindow.webContents.on("did-finish-load", () => {
+    config.sync();
+    injectBranding(mainWindow.webContents);
+  });
 
   // configure spellchecker context menu
   mainWindow.webContents.on("context-menu", (_, params) => {
@@ -200,6 +203,37 @@ export function createMainWindow() {
   // setInterval(() => setBadgeCount((++i % 30) + 1), 1000);
 }
 
+function injectBranding(wc: Electron.WebContents) {
+  const logoUrl = windowIconAsset;
+  wc.insertCSS(`
+    /* Hide Revolt text/wordmark labels */
+    [class*="wordmark"], [class*="Wordmark"], [data-app-name] { display: none !important; }
+  `);
+  wc.executeJavaScript(`
+    (function() {
+      const LOGO = ${JSON.stringify(logoUrl)};
+      function patch() {
+        document.querySelectorAll('img').forEach(function(img) {
+          var src = img.getAttribute('src') || '';
+          var alt = (img.getAttribute('alt') || '').toLowerCase();
+          if (
+            src.includes('revolt') ||
+            alt === 'revolt' ||
+            alt === 'stoat' ||
+            (src.startsWith('/') && src.match(/\\.(svg|png|webp)/) && alt.match(/revolt|logo/i))
+          ) {
+            img.src = LOGO;
+            img.removeAttribute('srcset');
+            img.alt = 'Sanctum';
+          }
+        });
+      }
+      patch();
+      new MutationObserver(patch).observe(document.documentElement, { childList: true, subtree: true });
+    })();
+  `, true).catch(function() {});
+}
+
 /**
  * Quit the entire app
  */