fix: expand/collapse all groups now works with nested groups

[kurama]

Summary

In this pull request, the following changes are made:

• The expand/collapse all groups button now properly handle nested group hierarchies at any depth level, instead of only working with root-level groups
• When collapsing all groups while viewing a nested group, the user is automatically navigated to the root parent group for a better UX
• The groupMonitors computed property was updated to include all groups with children, regardless of their nesting level, by removing the parent === null filter
• Added navigation logic that traverses up the group hierarchy to find the root parent and redirecfts the user there when collapsing from a nested view

I tested this by reproducing the scenario shown in the video from the issue, and the expand/collapse functionality now works correctly with nested groups at all levels.

Please test on your side and tell me if and don't hesitate to tell me if I've forgotten anything.

• Relates to Expand All Groups doesn't expand all groups #6788
• Resolves Expand All Groups doesn't expand all groups #6788

Please follow this checklist to avoid unnecessary back and forth (click to expand)

• ⚠️ If there are Breaking change (a fix or feature that alters existing functionality in a way that could cause issues) I have called them out
• 🧠 I have disclosed any use of LLMs/AI in this contribution and reviewed all generated content.
  I understand that I am responsible for and able to explain every line of code I submit.
• 🔍 Any UI changes adhere to visual style of this project.
• 🛠️ I have self-reviewed and self-tested my code to ensure it works as expected.
• 📝 I have commented my code, especially in hard-to-understand areas (e.g., using JSDoc for methods).
• 🤖 I added or updated automated tests where appropriate.
• 📄 Documentation updates are included (if applicable).
• 🧰 Dependency updates are listed and explained.
• ⚠️ CI passes and is green.

Screenshots for Visual Changes

• UI Modifications: Highlight any changes made to the user interface.
• Before & After: Include screenshots or comparisons (if applicable).

Event	Before	After
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Certificate-expiry
Testing

[Copilot]

Pull request overview

This PR fixes the expand/collapse all groups functionality to work correctly with nested group hierarchies at any depth level. Previously, the feature only worked with root-level groups.

Changes:

• Updated groupMonitors computed property to include all groups with children at any nesting level by removing the parent === null filter
• Added automatic navigation to root parent group when collapsing all groups while viewing a nested group
• Enhanced UX by preventing users from being stuck in collapsed nested groups

[kurama]

Added infinite loop protection with MAX_TRAVERSEL_STEP = 1000 as GitHub Copilot mentionned. Not sure what a realistic maximum nesting depth would be ?

[CommanderStorm]

LGTM.

Could you revert the copilot suggestion? I think we need to fix this in the validation step instead.

[CommanderStorm]

If circular groups are possible (have not checked, they might), this is a bug.

Let's not add handling for potential bugs in the frontend and simplify this to your OG version of this.

[kurama]

Done

[CommanderStorm]

thanks ❤️