Exam mode: Fix the display of students after exam conduction

[maximiliansoelch]

Checklist

General

• I tested all changes and their related features with all corresponding user types on a test server.
• Language: I followed the guidelines for inclusive, diversity-sensitive, and appreciative language.
• I chose a title conforming to the naming conventions for pull requests.

Client

• Important: I implemented the changes with a very good performance, prevented too many (unnecessary) REST calls and made sure the UI is responsive, even with large data.
• I followed the coding and design guidelines.

Motivation and Context

Fixes #7614

Description

Removes the check for only returning students in case student exams exist (if (studentExams!.length > 0)) + uses optional chaining to prevent runtime errors in case no student exam was generated for a student (didExamUserAttendExam: !!studentExam?.started).

Steps for Testing

Prerequisites:

• 1 Instructor
• 1 conducted/finished exam with no generated student exams or missing student exams

  • No student exams: https://artemis-test1.artemis.in.tum.de/course-management/17/exams/183/students
    

  • Missing student exams: https://artemis-test1.artemis.in.tum.de/course-management/17/exams/184/students
    

1. Go to the exam overview page
2. For the exam, which conforms to the conditions mentioned in the prerequisites, click on the Students button
3. All registered students should be displayed

Testserver States

Note

These badges show the state of the test servers.
Green = Currently available, Red = Currently locked

Review Progress

Performance Review

• I (as a reviewer) confirm that the client changes (in particular related to REST calls and UI responsiveness) are implemented with a very good performance
• I (as a reviewer) confirm that the server changes (in particular related to database calls) are implemented with a very good performance

Code Review

• Code Review 1
• Code Review 2

Manual Tests

• Test 1
• Test 2

Test Coverage

Screenshots

[github-actions]

⚠️ Unable to deploy to test servers ⚠️

The docker build needs to run through before deploying.

[MaximilianAnzinger]

Code lgtm
Manual on legacy TS1
Thx for the quick fix 👍