perf: optimize app startup and background lifecycles

vite.config.ts

@@ -82,6 +82,25 @@ export default defineConfig({
           },
         },
       },
+      {
+        // CPU-heavy local release builds run in an Electron utility process.
+        // Keep the worker as an explicit package entry so the release path is
+        // inspectable and does not depend on a sibling source checkout.
+        entry: 'electron/services/release-utility-worker.ts',
+        onstart(options) {
+          // If this entry happens to finish the development build last, the
+          // normal Electron main process still needs to start.
+          options.startup();
+        },
+        vite: {
+          build: {
+            outDir: 'dist-electron/utility',
+            rollupOptions: {
+              external: isMainProcessExternal,
+            },
+          },
+        },
+      },
     ]),
     !rendererOnly && renderer(),
   ].filter(Boolean),