Update requirement files with new feature templates and fix backend API error message, along with mobile project config updates and documentation improvements

03_source/mobile/src/data/user/user.reducer.ts

@@ -19,5 +19,7 @@ export function userReducer(state: UserState, action: UserActions): UserState {
       return { ...state, token: action.token };
     case 'check-user-session':
       return { ...state, isSessionValid: action.sessionValid };
+    default:
+      return { ...state };
   }
 }