Iris: Add clear chat session button

[dakennguyen]

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.

Server

• Important: I implemented the changes with a very good performance and prevented too many (unnecessary) database calls.
• I followed the coding and design guidelines.
• I added multiple integration tests (Spring) related to the features (with a high test coverage).
• I added pre-authorization annotations according to the guidelines and checked the course groups for all new REST Calls (security).
• I documented the Java code using JavaDoc style.

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 added authorities to all new routes and checked the course groups for displaying navigation elements (links, buttons).
• 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.

Changes affecting Programming Exercises

• I tested all changes and their related features with all corresponding user types on Test Server 1 (Atlassian Suite).
• I tested all changes and their related features with all corresponding user types on Test Server 2 (Jenkins and Gitlab).

Motivation and Context

Add clear chat history button. In the background, it will call API from the server to create a new session

Description

• Add a new button and call API on click

Steps for Testing

Prerequisites:

• 1 Student
• 1 Programming Exercise with Iris enabled

1. Log in to Artemis
2. Navigate to a programming exercise with Iris enabled
3. Chat something and then click on the Trash button
4. Click submit on the confirm modal
5. Your chat history should disappear and you can chat with the new context
6. The trash button is disappear
7. Refresh the page, accept the policy, and even with Iris welcome message the trash button still disappears

It should be able to work on all sizes of the chatbot

Exam Mode Testing

Review Progress

Performance Review

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

Exam Mode Test

• Test 1
• Test 2

Test Coverage

Screenshots

[github-actions]

❌ Unable to deploy to test servers ❌

Testserver "artemis-test9.artemis.cit.tum.de" is already in use by PR #6931.