App icon: hummingbird-key mark for window and packaged Linux builds

frontend/electron/main.ts

@@ -82,6 +82,18 @@ function resolveBackendPath(): string {
   return path.join(app.getAppPath(), '..', 'target', 'release', 'keynectr');
 }
 
+/**
+ * The app icon ships inside the bundle: Vite copies `public/icon.png` into
+ * `dist/`, so the packaged app finds it next to the loaded page. In dev the
+ * Vite project's `public/` folder is the same file.
+ */
+function resolveWindowIcon(): string {
+  const base = app.isPackaged
+    ? path.join(app.getAppPath(), 'dist')
+    : path.join(app.getAppPath(), 'public');
+  return path.join(base, 'icon.png');
+}
+
 function startBackend(): void {
   if (backendStarted && backend && backend.exitCode === null) {
     return;
@@ -500,6 +512,7 @@ function createWindow(): void {
     minWidth: 920,
     minHeight: 640,
     title: 'Keynectr',
+    icon: resolveWindowIcon(),
     backgroundColor: '#f6f4f0',
     autoHideMenuBar: true,
     webPreferences: {