fix(icons): give the dev Dock its own mac-grid png

Linux uses apple-touch-icon.png as the window icon and Nix requires it to
match the full-bleed launcher icon, so keep it full-bleed and point the
dev-only app.dock.setIcon at assets/icon-mac.png instead.

apps/desktop/electron/main.ts

@@ -14720,7 +14720,8 @@ function createWindow() {
 
     // Packaged builds keep the bundle icon so macOS can style it (#73195).
     if (icon && shouldOverrideDockIcon({ platform: process.platform, isPackaged: app.isPackaged })) {
-      app.dock?.setIcon(icon)
+      // The window icon is full-bleed for Linux; the Dock wants the mac grid.
+      app.dock?.setIcon(resolveAppIcon([path.join(APP_ROOT, 'assets', 'icon-mac.png')]) ?? icon)
     }
   }
 

scripts/generate_icons.py

@@ -175,8 +175,9 @@ TARGETS: list[tuple[str, str, object]] = [
     ("apps/desktop/assets/appx/StoreLogo-dark.png", "png_dark", 50),
     ("apps/desktop/assets/appx/Square44x44Logo-dark.png", "png_dark", 44),
     ("apps/desktop/assets/appx/Square150x150Logo-dark.png", "png_dark", 150),
-    # The dev-run Dock icon (app.dock.setIcon), so it sits on the mac grid too.
-    ("apps/desktop/public/apple-touch-icon.png", "png_mac", 1024),
+    ("apps/desktop/public/apple-touch-icon.png", "png", 1024),
+    # The dev-run Dock icon (app.dock.setIcon): same mac grid as the icns.
+    ("apps/desktop/assets/icon-mac.png", "png_mac", 1024),
     ("apps/desktop/public/nous-girl.png", "girl_light", 256),
     ("apps/desktop/public/nous-girl-dark.png", "girl_dark", 256),
     ("apps/bootstrap-installer/src-tauri/icons/32x32.png", "png", 32),