- Added PUT /api/customer-projects/:projectId endpoint to handle updates for selected_package_id and selected_package_name. - Implemented auto-save feature in FinalReview.js to persist material changes automatically. - Enhanced error handling in InlineSmartPackage.js for package selection saving. - Updated documentation for materials saving error analysis and implementation details. - Removed unused code sections in PlanningDashboard.js and added comments for future features.