Guided setup engine without AI

Improvements

• The private panel API supports cards using the same slots as the form, a preview and a plan to review before confirmation. It uses no AI or model prices. Untouched data can be undone; restarting requires no real customers or tasks. The chat interface will arrive in a later step; the current form remains available.
• After confirmation, the preview keeps the active catalog and changing only hours offers a small plan. Undo or restart lets you rebuild the same cards while the interview’s own items remain unchanged; unrelated or edited inactive items require review.
• Restart coordinates new activity within the same project without blocking other projects. Rebuilding the reverted catalog is authorized only by the server.