fix(desktop): disable main/preload minification to keep page.evaluate stable

Playwright serializes the function passed to page.evaluate via .toString()
and runs it in the browser context. With main-process minify on, esbuild
renames inlined helpers (e.g. __name) and closure references to two-letter
identifiers like FK/p/ed; their definitions stay at module scope on the
Node side, so the browser eval throws ReferenceError. Mac dev builds were
unaffected because dev mode doesn't minify; only packaged Windows builds
hit this. Main process bundle size is irrelevant (loaded once on startup)
so turning minify off is the cheapest correct fix.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/desktop-client/electron.vite.config.ts

@@ -29,6 +29,12 @@ export default defineConfig({
     plugins: [externalizeDepsPlugin({ exclude: workspacePackages })],
     build: {
       sourcemap: 'hidden',
+      // Disable minification for the main process: the bundle is only loaded
+      // once on app startup so size is irrelevant, and minified short names
+      // break Playwright `page.evaluate` because the function is serialized
+      // via `.toString()` and helper identifiers (e.g. `__name` renamed to
+      // `FK`) become undefined in the browser context.
+      minify: false,
       rollupOptions: {
         input: {
           bootstrap: resolve(rootDir, 'src/main/bootstrap.ts'),
@@ -51,6 +57,7 @@ export default defineConfig({
     plugins: [externalizeDepsPlugin({ exclude: workspacePackages })],
     build: {
       sourcemap: 'hidden',
+      minify: false,
       rollupOptions: {
         input: {
           bridge: resolve(rootDir, 'src/preload/bridge.ts'),