fix(ci): reuse Linux binary for AppImage packaging

scripts/build-linux-appimage.node-test.js

@@ -0,0 +1,20 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { APPIMAGE_CONFIG, appImageBundleArguments } from './build-linux-appimage.js';
+
+test('AppImage config removes only engine-dist from Tauri resources', () => {
+  assert.deepEqual(JSON.parse(APPIMAGE_CONFIG), {
+    bundle: {
+      resources: {
+        'engine-dist/': null,
+      },
+    },
+  });
+});
+
+test('AppImage bundling uses the existing binary instead of tauri build', () => {
+  const args = appImageBundleArguments('x86_64-unknown-linux-gnu');
+  assert.equal(args[3], 'bundle');
+  assert.equal(args.includes('build'), false);
+  assert.deepEqual(args.slice(-2), ['--config', APPIMAGE_CONFIG]);
+});