🐛 Fix exit code handling in orchestrator

Simplify condition from 'if code and code != 0' to 'if code != 0'.
Previous logic was correct but unnecessarily complex.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Ralph Agent

onboard.py

@@ -95,7 +95,7 @@ def _run_orchestrator() -> None:
             completed.append(label)
         except (typer.Exit, SystemExit) as exc:
             code = getattr(exc, "code", getattr(exc, "exit_code", 1))
-            if code and code != 0:
+            if code != 0:
                 rprint(f"[red]✗ {label} failed.[/red]")
                 cont = questionary.confirm(
                     "Continue with remaining steps?", default=True