Add /myroomnick slash command to change your display name in the current room

[bxdxnn]

Content

Motivation and context

Feature parity with Element Classic and it has been frequently requested.

Screenshots / GIFs

Tests

• Type the command
  • Check that your display name have changed only in the current room

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• This PR was made with the help of AI:
  • Yes. In this case, please request a review by Copilot.
  • No.
• Changes have been tested on an Android device or Android emulator with API 24
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#accessibility
• Pull request is based on the develop branch
• Pull request title will be used in the release note, it clearly defines what will change for the user
• Pull request includes screenshots or videos if containing UI changes
• You've made a self review of your PR

[github-actions]

Thank you for your contribution! Here are a few things to check in the PR to ensure it's reviewed as quickly as possible:

• If your pull request adds a feature or modifies the UI, this should have an equivalent pull request in the Element X iOS repo unless it only affects an Android-only behaviour or is behind a disabled feature flag, since we need parity in both clients to consider a feature done. It will also need to be approved by our product and design teams before being merged, so it's usually a good idea to discuss the changes in a Github issue first and then start working on them once the approach has been validated.
• Your branch should be based on origin/develop, at least when it was created.
• The title of the PR will be used for release notes, so it needs to describe the change visible to the user.
• The test pass locally running ./gradlew test.
• The code quality check suite pass locally running ./gradlew runQualityChecks.
• If you modified anything related to the UI, including previews, you'll have to run the Record screenshots GH action in your forked repo: that will generate compatible new screenshots. However, given Github Actions limitations, it will prevent the CI from running temporarily, until you upload a new commit after that one. To do so, just pull the latest changes and push an empty commit.

[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.25%. Comparing base (f447560) to head (4b99e59).
⚠️ Report is 69 commits behind head on develop.

Files with missing lines	Patch %	Lines
...droid/libraries/matrix/impl/room/JoinedRustRoom.kt	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #6865      +/-   ##
===========================================
- Coverage    81.26%   81.25%   -0.01%     
===========================================
  Files         2652     2652              
  Lines        74404    74410       +6     
  Branches      9650     9650              
===========================================
- Hits         60463    60462       -1     
- Misses       10378    10388      +10     
+ Partials      3563     3560       -3     

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[bmarty]

Thanks!

[bmarty]

Thinking about it only now, sorry. Maybe the application should prevent the user from updating their display name in a room when HomeserverCapabilitiesProvider.canChangeDisplayName() returns false.

Not sure, pinging @mxandreas

[bmarty]

See my question above

[bxdxnn]

Thinking about it only now, sorry. Maybe the application should prevent the user from updating their display name in a room when HomeserverCapabilitiesProvider.canChangeDisplayName() returns false.

Not sure, pinging @mxandreas

That depends on element-hq/synapse#17048, we shouldn't just do client-side checks but also make Synapse to block it.

If that's required for this feature, I can try to fix it in Synapse too.

[bxdxnn]

Synapse fix is at element-hq/synapse#19811, but it's not blocking to merge it in the app meanwhile.

[bmarty]

Thanks for the update and the PR on Synapse!