fix(desktop): packaged macOS app launched with no window / blank white screen

In packaged Electron builds, `process.argv[1]` is undefined (Electron loads
the main script via package.json `main`, not via argv), so the bottom-of-file
guard never invoked `run()` and the app started without creating a window.
Also build the dashboard client with `--base ./` so its `file://`-loaded
index.html resolves `./assets/*` from inside the asar instead of the
filesystem root, which was producing a blank white window.

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

packages/desktop/scripts/workspace-tools.ts

@@ -48,5 +48,8 @@ export async function buildDashboard(): Promise<void> {
 }
 
 export async function buildDashboardClient(): Promise<void> {
-  await runWorkspaceBin("vite", ["build"], resolve(workspaceRoot, "packages", "dashboard"));
+  // Desktop loads index.html via file:// from inside the asar, so absolute
+  // asset paths (/assets/...) resolve to the filesystem root and fail. Build
+  // with a relative base so the bundled HTML references ./assets/... instead.
+  await runWorkspaceBin("vite", ["build", "--base", "./"], resolve(workspaceRoot, "packages", "dashboard"));
 }

packages/desktop/src/main.ts

@@ -267,6 +267,10 @@ export function run(): void {
 }
 
 const modulePath = fileURLToPath(import.meta.url);
-if (process.argv[1] && resolve(process.argv[1]) === modulePath) {
+const isElectronMain =
+  (process as NodeJS.Process & { type?: string }).type === "browser";
+const isDirectInvocation =
+  !!process.argv[1] && resolve(process.argv[1]) === modulePath;
+if (isElectronMain || isDirectInvocation) {
   run();
 }