Fixed notification +N count badge alignment in ActivityPub

[minimaluminium]

ref https://linear.app/ghost/issue/DES-1400/notification-more-count-15-etc-alignment-is-off-in-activitypub

• the avatar stack row stretched to full width, so the absolutely positioned +N badge anchored to the far right edge instead of the last avatar
• added w-fit so the row shrinks to its content, letting the existing right offset land the badge on the last avatar

[coderabbitai]

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ℹ️ Recent review info

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Reviewing files that changed from the base of the PR and between 4c52d99 and e82761d.

📒 Files selected for processing (2)

• apps/activitypub/package.json
• apps/activitypub/src/views/notifications/notifications.tsx

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Walkthrough

This PR bumps the @tryghost/activitypub package version from 3.1.29 to 3.1.30 in the package manifest. Additionally, the avatar-group wrapper in the notifications view is updated with a w-fit Tailwind class to constrain its width, while preserving existing flex layout properties and alignment.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: fixing notification badge alignment in ActivityPub by constraining the avatar row width.
Description check	✅ Passed	The description is directly related to the changeset, providing context about the issue, root cause, and the specific CSS fix applied.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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• Commit unit tests in branch ap-notification-count-alignment-fix-DES-1400

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