fix: resolve CI build failures caused by pnpm detection and Node.js 24 incompatibility

Co-authored-by: davidonet <582253+davidonet@users.noreply.github.com>
Agent-Logs-Url: https://github.com/davidonet/Sidekick2000/sessions/11f163d9-9006-4e3a-90d9-a12b12853094

Author: Copilot

.github/workflows/build.yml

@@ -4,9 +4,6 @@ on:
   push:
     branches: [main]
 
-env:
-  FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: "true"
-
 jobs:
   build:
     strategy: