2468 improve authored rules loading

[Aibono1225]

Description

✏️

Relates to #2468

Refactors the authored rules fetching and pagination logic for the user client page.

• Changed the authored rules fetching logic in UserRulesClientPage to use backward pagination (last and before), progressively loading rules and updating the UI as each batch arrives. Pagination controls are only enabled once all rules are fetched.
• Modified the API route app/api/tina/rules-by-author/route.ts to accept last, before, and sort parameters, aligning with the new backend pagination scheme.

Screenshot (optional)

✏️
The authored rule lists loads faster now:
https://github.com/user-attachments/assets/b3aa6b5b-1546-4be4-a6dc-3922576a5976

[Copilot]

Pull request overview

This PR improves the loading experience for authored rules by implementing progressive/streaming loading and changing from forward to backward pagination to fetch items in reverse chronological order.

Changes:

• Modified GraphQL query and API route to use backward pagination (last/before instead of first/after) with explicit sorting by lastUpdated
• Implemented progressive loading that renders results as soon as the first page arrives while continuing to fetch additional pages in the background
• Added deduplication logic to prevent duplicate rules from appearing in the list

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 12 comments.

File	Description
tina/queries/queries.gql	Changed rulesByAuthor query to use backward pagination parameters (last/before/hasPreviousPage/startCursor) and added explicit sort parameter
app/api/tina/rules-by-author/route.ts	Updated API route to accept last/before parameters instead of first/after, added sort: "lastUpdated" to query call, includes fallback to first parameter for backward compatibility
app/user/client-page.tsx	Increased fetch page size from 10 to 100, implemented progressive loading with early rendering after first page, added deduplication using Set, updated loading states and UI to show pagination only after all data is loaded

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[Aibono1225]

/deploy

[github-actions]

PR Preview Deployed

Preview URL	https://app-sswrules-staging-pr-2476.azurewebsites.net/rules
Slot Name	pr-2476
Branch	2468-improve-authored-rules-loading
Commit	f0edb26dd7e3fec2240f6cfa8d6c16754689b37f

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