fix(shutdown): stop instances before app exit

Prevent desktop wrappers from SIGKILLing the CLI during shutdown, which could orphan OpenCode workspace processes. Shut down workspaces earlier/in parallel and increase the quit grace period.

packages/electron-app/electron/main/process-manager.ts

@@ -178,7 +178,7 @@ export class CliProcessManager extends EventEmitter {
     return new Promise((resolve) => {
       const killTimeout = setTimeout(() => {
         child.kill("SIGKILL")
-      }, 4000)
+      }, 30000)
 
       child.on("exit", () => {
         clearTimeout(killTimeout)
@@ -376,4 +376,3 @@ export class CliProcessManager extends EventEmitter {
     throw new Error("Unable to locate CodeNomad CLI build (dist/bin.js). Run npm run build --workspace @neuralnomads/codenomad.")
   }
 }
-