New feature label

[hanars]

No description provided.

[Copilot]

Pull request overview

Adds a “New” indicator next to the Feature Updates header link by surfacing the most recent Feature Update publish date from the backend (cached in Redis) into the React app’s initial meta JSON.

Changes:

• Fetch latest Feature Updates Atom feed entry publish date server-side and cache it in Redis.
• Expose meta.lastFeatureUpdate to the UI via a new Redux selector.
• Render a “New” Label in the header when the latest update is within the last month; update/extend react app page tests accordingly.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
ui/shared/components/page/Header.jsx	Renders “New” label next to Feature Updates link based on lastFeatureUpdate.
ui/redux/selectors.js	Adds selector to read meta.lastFeatureUpdate.
seqr/views/react_app.py	Adds lastFeatureUpdate to initial page JSON; fetches/caches latest publish date via Redis + GitHub feed.
seqr/views/apis/feature_updates_api.py	Refactors feed fetch into fetch_feature_updates() for reuse.
seqr/views/react_app_tests.py	Adds mocking for feed/Redis and asserts lastFeatureUpdate behavior in initial JSON.

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