Plagiarsim checks: Fix default value of after due date checks

[Strohgelaender]

Checklist

General

• I tested all changes and their related features with all corresponding user types on a test server.
• This is a small issue that I tested locally and was confirmed by another developer 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.
• Following the theming guidelines, I specified colors only in the theming variable files and checked that the changes look consistent in both the light and the dark theme.
• I added multiple integration tests (Jest) related to the features (with a high test coverage), while following the test guidelines.
• I documented the TypeScript code using JSDoc style.
• I added multiple screenshots/screencasts of my UI changes.
• I translated all newly inserted strings into English and German.

Motivation and Context

Fixes #7651
Fixes #7611
Follow-up of #7665

Description

When creating or importing an exercise, the "run plagiarism checks" checkbox was active, even if cpc was disabled. While this had no direct effect, the UI is confusing and should be clear in showing what options are active when working with an exercise.

Steps for Testing

Prerequisites:

• 1 Instructor

1. Create a new Exercise -> Check that CPC and the checks after the due date are disabled by default.
2. Activate CPC -> see that the checks also get enabled
3. Deactivate CPC -> see that the checks automatically get disabled
4. Check that creating the exercise works

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

Code Review

• Code Review 1
• Code Review 2

Manual Tests

• Test 1
• Test 2

Test Coverage

Client

Class/File	Line Coverage	Confirmation (assert/expect)
exercise-update-plagiarism.component.ts	100%	✅

[MaximilianJG]

Tested on Artemis Test 2: Works as expected!

• Import page renders
• CPC Checks are disabled by default
• When enabling CPC the checks also get activated / deactivated
• Importing works

[sarpsahinalp]

Tested on ts2. Worked as expected for exercises. In exam mode I wan't able to see the CPC part for the same exercise.
Exam exercise import

Exercise import

[Strohgelaender]

@sarpsahinalp CPC is not available for exams, I updated the testing steps to reflect that properly. Thanks for testing!

[milljoniaer]

Code LGTM 👍

[jakubriegel]

Please take a look at #7665

[tobias-lippert]

Code LGTM

[jakubriegel]

Code looks good. Thanks for this improvement!

[FiasKr]

Tested on TS3, working as expected

[JanaNF]

Manual tested on legacy_ts2. Worked as expected.

[AntonGeTUM]

Manually tested, worked as described

[vinceclifford]

Tested on TS2, works as expected

[Predixx]

Tested on ts2. I think it works. "Check the submissions for plagiarism one more time after the due date" was grayed out for me but checked.