Google Apps Script Automation – Tool Issue/Return

Looking for an experienced Google Apps Script developer to review, fix, and improve an existing QR-based Tool Tracking System built with Google Sheets and Apps Script.
The system is already functional but has logic issues that need to be corrected and optimized.
**Project Scope & Deliverables**
**Milestone 1:**
* Review all existing Apps Script files
* Fix QR generation logic (QR should contain Tool ID only)
* Fix Issue/Return process duplication bugs
* Repair Finish and Cancel button functionality
* Fix Add Another Tool flow
* Add proper loading indicators where needed
* Ensure the system runs smoothly without errors
* Telrgram connecting to appscript
**Milestone 2:**
* Final system testing
* Improve workflow reliability
* Fix concurrency issues (if multiple users operate simultaneously)
* Dashboard improvements (if needed)
* Final cleanup and deployment-ready version
**Deadline Expectations**
* Milestone 1: 5–7 days
* Milest...