Copy each file to the SAME relative path in your project. Overwrite the
existing file at that path in every case (all 9 files already exist in
your project — none of these are new files this time).

backend/ClinicalInsightsPro.API/Controllers/PatientsController.cs
backend/ClinicalInsightsPro.API/Models/Patient.cs
backend/ClinicalInsightsPro.API/DTOs/ResourceDtos.cs
backend/ClinicalInsightsPro.API/Services/ValidationService.cs
backend/ClinicalInsightsPro.API/Services/Interfaces/IValidationService.cs
backend/ClinicalInsightsPro.API/Frontend/patients.html
backend/ClinicalInsightsPro.API/Frontend/js/api.js
backend/ClinicalInsightsPro.API/Frontend/js/sidebar.js
backend/ClinicalInsightsPro.API/Frontend/js/config.js

VERIFY BEFORE RUNNING ANYTHING:
  findstr /C:"updatePatient" backend\ClinicalInsightsPro.API\Frontend\js\api.js
This must print a line. If it doesn't, the copy did not happen.

THEN:
  cd backend\ClinicalInsightsPro.API
  rmdir /s /q bin
  rmdir /s /q obj
  dotnet run

THEN test in a browser window that has never loaded this app before
(a fresh Incognito/InPrivate window, not a refreshed old tab).
