run start-local-agent.ps1 in foreground for clearer failures

Running via cmd /c start.bat in the background hides ps1 errors.
Invoke ps1 directly so any exception surfaces in the runner log.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ouyyyyang

.github/workflows/windows-smoke.yml

@@ -26,18 +26,13 @@ jobs:
         shell: pwsh
         run: npm ci
 
-      - name: Start agent via start.bat
+      - name: Start agent via start-local-agent.ps1 (foreground)
         shell: pwsh
         run: |
-          $ErrorActionPreference = "Stop"
-          Write-Host "Launching start.bat in background..."
-          $proc = Start-Process `
-            -FilePath "cmd.exe" `
-            -ArgumentList "/c", "start.bat" `
-            -WorkingDirectory "$env:GITHUB_WORKSPACE" `
-            -WindowStyle Hidden `
-            -PassThru
-          Write-Host "start.bat launcher PID: $($proc.Id)"
+          $ErrorActionPreference = "Continue"
+          Write-Host "Running start-local-agent.ps1 in foreground to surface errors..."
+          & "$env:GITHUB_WORKSPACE\scripts\dev\start-local-agent.ps1"
+          Write-Host "start-local-agent.ps1 exit code: $LASTEXITCODE"
 
       - name: Wait for agent to be ready
         shell: pwsh