feat(compass, preferences): implement zoom level persistence COMPASS-9905

[miya]

Description

This PR adds the ability to persist user zoom level settings across application restarts, improving the user experience by maintaining their preferred zoom level.

Checklist

• New tests and/or benchmarks are included
• Documentation is changed or added
• If this change updates the UI, screenshots/videos are added and a design review is requested
• I have signed the MongoDB Contributor License Agreement (https://www.mongodb.com/legal/contributor-agreement)

Motivation and Context

• Bugfix
• New feature
• Dependency update
• Misc

Open Questions

Dependents

Types of changes

• Backport Needed
• Patch (non-breaking change which fixes an issue)
• Minor (non-breaking change which adds functionality)
• Major (fix or feature that would cause existing functionality to change)

[Copilot]

Pull Request Overview

This PR implements zoom level persistence functionality, allowing users to maintain their preferred zoom level across application restarts. The implementation includes debounced saving of zoom level changes to prevent excessive disk writes and proper restoration of saved zoom levels on startup.

• Adds debounced zoom level persistence with 500ms delay to avoid frequent saves
• Implements zoom level restoration on application startup with validation
• Extends preferences schema to include optional zoomLevel property

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/compass/src/app/application.tsx	Implements zoom level persistence logic with debounced saving and startup restoration
packages/compass-preferences-model/src/preferences-schema.tsx	Adds zoomLevel property to preferences schema with proper validation

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

---

_{Tip: Customize your code reviews with copilot-instructions.md. Create the file or learn how to get started.}

[Copilot]

The saveTimeout variable is declared in function scope but needs to persist across multiple function calls. Consider moving this to a higher scope or using a closure to avoid potential issues with variable lifecycle.

[miya]

fix: 6b4ce4d

[Copilot]

The empty catch block with 'noop' comment provides no debugging information. Consider logging the error or adding a more descriptive comment explaining why errors are intentionally ignored.

[Anemy]

Hi @miya thanks for opening the pr! Can you sign the contributors agreement please? https://www.mongodb.com/legal/contributor-agreement
We require folks to do that before we can accept a change.
We've seen some other folks ask for this feature, thank you for looking into it.

[miya]

Hi @Anemy, nice to meet you!
Thank you for your reply. I’ve signed the contributors agreement as requested.
I’m glad to hear this feature is of interest to others as well. Looking forward to your feedback on the PR!

[gribnoysup]

LGTM! We'll wait for CI to pass and then will merge, thanks again for the contribution, these are always welcome

[gribnoysup]

Hey @miya! Can you please sign the CLA again? We're having trouble finding your name in the list, it might be a technical issue on our side, but just to make sure it's there

[miya]

@gribnoysup
Sorry about that. I just checked and it looks like I had signed with the wrong GitHub username. I’ve corrected it and re-signed with the right one. Could you please confirm?

[gribnoysup]

@miya no worries at all. Took us a bit of time to double-check, but we can see the signature now, thanks for being patient with us and for an amazing contribution!

[gribnoysup]

Need to restart CI to get rid of flakes, will merge after that