v1.5.0 - integrated conversion error reporting

Added

• Built-in conversion error handling with stable error codes
• One-click copyable error reports
• Detailed diagnostic reports in the browser console

Improved

• Improved conversion button alignment and text centering
• Improved restoration of the original MakerWorld button after each conversion
• Automatically closes open status panels

Fixed

• Fixed several button state restoration edge cases
• Fixed multiple UI issues related to repeated conversions