remove Y axis for discrete questions in feed and in collapsed group view

[ncarazon]

Resolves #4900

Removes the Y-axis from discrete question distribution charts in feed cards and collapsed group rows.

Implemented changes:

• Added support for hiding the chart Y-axis while preserving the distribution, median/range markers, and X-axis.
• Applied the hidden Y-axis behavior to discrete questions in feed cards and collapsed group forecast rows.

Summary by CodeRabbit

• New Features

  • Charts now support optionally hiding the Y-axis.
  • Discrete questions will automatically use a cleaner chart layout without the Y-axis in more views.

• Bug Fixes

  • Improved chart spacing so labels and axes align correctly when the Y-axis is shown or hidden.
  • Applied the same Y-axis behavior consistently across chart layouts.

[coderabbitai]

Important

Review skipped

Draft detected.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 027d69bd-4eec-4d4b-9dff-9bac8b0e9f9d

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• ✅ Review completed - (🔄 Check again to review again)

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/remove-discrete-question-y-axis

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}

[github-actions]

🚀 Preview Environment

Your preview environment is ready!

Resource	Details
🌐 Preview URL	https://metaculus-pr-4938-feat-remove-discrete-question-preview.mtcl.cc
📦 Docker Image	ghcr.io/metaculus/metaculus:feat-remove-discrete-question-y-axis-5d97679
🗄️ PostgreSQL	NeonDB branch preview/pr-4938-feat-remove-discrete-question
⚡ Redis	Fly Redis mtc-redis-pr-4938-feat-remove-discrete-question

Details

• Commit: c5d90becc28ff38f4ce5deda19fd90c1e7b010c5
• Branch: feat/remove-discrete-question-y-axis
• Fly App: metaculus-pr-4938-feat-remove-discrete-question

---

ℹ️ Preview Environment Info

Isolation:

• PostgreSQL and Redis are fully isolated from production
• Each PR gets its own database branch and Redis instance
• Changes pushed to this PR will trigger a new deployment

Limitations:

• Background workers and cron jobs are not deployed in preview environments
• If you need to test background jobs, use Heroku staging environments

Cleanup:

• This preview will be automatically destroyed when the PR is closed