Infinite scroll messages

[kentcdodds]

Summary

Implemented infinite scrolling for past messages by refactoring message fetching into a dedicated resource route and a shared pagination utility. This allows the recipient detail page to progressively load older messages using a useFetcher.

Test Plan

1. Navigate to a recipient's detail page.
2. Scroll down the message list to trigger loading of older messages.
3. Verify that older messages are appended to the list.
4. (Optional) Apply search or date filters and verify infinite scroll still functions correctly with filtered results.

Checklist

• Tests updated
• Docs updated

Screenshots

(Not available due to computerUse tool resource exhaustion during the session.)

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[cursor]

Cursor Agent can help with this pull request. Just @cursor in comments and I'll start working on changes in this branch.
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