Add stable multi-key tie-breaking test coverage for useSortableData

[Jagadeeshftw]

📌 Description

useSortableData<T, K> (src/hooks/useSortableData.ts) backs the sortable columns on AnchorTable, PoolTable, and SettlementTable. useSortableData.test.ts likely covers single-key ascending/descending sorts, but ties on the primary sort key (e.g. multiple settlements with the same status) aren't explicitly tested for stable ordering, which matters for a predictable UI when a user sorts a table with many equal values.

🧩 Requirements and context

• Add a test asserting rows with equal values on the active sort key retain their original relative order (stable sort) rather than reshuffling arbitrarily.
• Verify this holds across both ascending and descending directions.
• Fix useSortableData.ts if it's found to use a non-stable comparator (e.g. relying on Array.prototype.sort without a documented tie-break) and stability doesn't hold.

🛠️ Suggested execution

• Extend src/hooks/useSortableData.test.ts with a tied-values fixture and stability assertions.
• Fix the hook if instability is found.
• Spot-check AnchorTable.test.tsx/SettlementTable.test.tsx for an equivalent integration-level assertion.

✅ Acceptance criteria

• Tied rows retain stable relative order in both sort directions.
• Regression test locks in the guarantee.
• Any instability found is fixed.

🔒 Security notes

No new attack surface; purely a UI-correctness concern.

📋 Guidelines

• Minimum 95% test coverage
• Clear documentation
• Timeframe: 96 hours

[Binali223]

Hello Maintainer, I'd like to work on this issue. I have experience with backend development and state management, and I can implement this. Please consider assigning it to me.

[grantfox-oss]

🦊 GrantFox — @Binali223 has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #68)
2. Your PR will be reviewed by the AnchorNet-Org maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🦊 GrantFox — @Binali223 has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #68)
2. Your PR will be reviewed by the AnchorNet-Org maintainers

Good luck! Track your progress on GrantFox.