Add --gui flag to integration tests to exercise GUI package install

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.github/workflows/integration.yml

@@ -59,7 +59,7 @@ jobs:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          echo y | ./bootstrap_environment
+          echo y | ./bootstrap_environment --gui
 
   conclusion:
     name: Final Status Check

ci/main.go

@@ -99,7 +99,7 @@ func main() {
 			// 4. Run bootstrap binary against the full package set (no scope flags).
 			// We pipe 'y' to satisfy the "Proceed? [y/N]" prompt.
 			fmt.Printf("[%s] Executing bootstrap_environment...\n", target)
-			testContainer = testContainer.WithExec([]string{"sh", "-c", "echo y | bootstrap_environment"})
+			testContainer = testContainer.WithExec([]string{"sh", "-c", "echo y | bootstrap_environment --gui"})
 
 			// 5. Verify all installed custom packages return a path and zero exit code from version command
 			fmt.Printf("[%s] Verifying package installations on PATH and running version checks...\n", target)