Feat/80 Stellar wallet transaction history table with export and filter controls

[temisan0x]

Closes #80

Summary

Adds a reusable transaction history table for Stellar wallets with sorting, pagination, agent + status filters, keyboard-accessible rows, responsive layout, and CSV/JSON export for the currently filtered dataset. Includes mock transaction data for development.

What I changed

• TransactionHistoryTable.tsx — new table component (react-table, filters, exports, accessible rows)
• data-table.tsx — minor wrapper addition
• mockData.ts — generateMockTransactions() + mockTransactions
• transactions/page.tsx — wired new table into the page

Acceptance checklist

• Sorting / Pagination / Filtering via @tanstack/react-table
• Agent + Status filters applied to exported dataset
• CSV / JSON export (filtered rows only)
• Responsive layout + empty state
• Keyboard-accessible rows/controls with visible focus rings
• Strongly typed with no any — a few localized casts remain, will tighten on review feedback
• npm run typecheck, npm run lint, npm run build pass

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[mergekeeper]

MergeKeeper review

Scope: in scope for linked issue #80.
Verdict: clean

The transaction history table implementation meets all requirements with TanStack Table, sorting, filtering, exporting, and accessibility features.

Reviewed commit: f21ff030afe43c7d2423aaa243f75798860df820.
CI and merge eligibility are checked separately.

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[mergekeeper]

Needs review

Linked to #80, but the diff does not match the issue scope.

The pull request includes numerous unrelated changes such as department budget breakdown components, financial report exporter features, and reports pages that are outside the scope of issue #80.

Reviewed commit: 9f73f6cfa7134b66c71fffb2cb0f6bae705a320d.

[mergekeeper]

Approved

The pull request successfully implements the Stellar wallet transaction history table and export features as specified in issue #80.

[mergekeeper]

MergeKeeper merge status

Status: blocked
PR state: open
Mergeability: mergeable
Checked commit: 522c2543b56fe3047deb9e843c79e01d054d2b27.

Reason:
GitHub pull request merge request failed with 405: 3 of 3 required status checks are expected.

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[mergekeeper]

Approved

The transaction history table implementation meets all requirements with TanStack Table, sorting, filtering, exporting, and accessibility features.

[mergekeeper]

Merged

Merged with squash.