fix(desktop): show the Paseo window icon on Linux (#6645)

Packaged windows read resources/icon.png, but Linux packages only
installed desktop-entry icons. Include the runtime PNG and verify its
bytes in the existing packaged artifact smoke test.

Co-authored-by: paseo-bot[bot] <266920839+paseo-bot[bot]@users.noreply.github.com>
Co-authored-by: Ivan Pantic <panta@talentkit.io>
Co-authored-by: Max Höhl <43786929+whme@users.noreply.github.com>

packages/desktop/e2e/packaged-app-smoke.js

@@ -848,6 +848,11 @@ async function assertSandboxState({ browser, page, expectedSandbox, stdout, stde
 
 function assertLinuxDesktopIdentity(appPath) {
   if (process.platform === "linux") {
+    assert.deepEqual(
+      fs.readFileSync(path.join(appPath, "resources", "icon.png")),
+      fs.readFileSync(path.join(__dirname, "..", "assets", "icon.png")),
+      "Packaged Linux windows must have the Paseo icon at their runtime lookup path",
+    );
     const metadata = JSON.parse(
       extractFile(path.join(appPath, "resources", "app.asar"), "package.json").toString(),
     );

packages/desktop/electron-builder.yml

@@ -65,6 +65,8 @@ linux:
   extraResources:
     - from: bin/paseo
       to: bin/paseo
+    - from: assets/icon.png
+      to: icon.png
   target:
     - AppImage
     - deb