refactor: streamline order progress state management and enhance tests

[fairlighteth]

Summary

Fixes #6509

Keeps cancellation-triggered orders in the progress-bar store while the confirmation modal is still referencing them, so the “Cancellation failed / oops” banner can render reliably. The updater now unions the tracked IDs from pending orders, surplus queue, confirmation hash, and cancellation flags via a dedicated selector, and all updaters short-circuit until a real orderId exists to avoid infinite render loops. Added regression coverage for both the selector and updater.

To Test

1. Reproduce the cancel-during-execution flow

   • Place a swap order and keep the progress modal open.
   • Trigger cancellation near the third progress step (likely to fail), then wait for the trade to execute.
   • The modal should display “Cancellation failed: The order was executed before it could be cancelled.”
   • The banner should remain visible until the modal is dismissed.

2. Regression check for solver info (from PR fix: keep displayed orders in progress state and dedupe favicon completions #6510)

   • With two pending market orders, allow the first to fill while the second stays pending.
   • Open the surplus modal for the filled order.
   • Solver rankings remain visible (no flashing/disappearing).

Background

The favicon update (#6358) introduced aggressive pruning that removed progress-bar state as soon as an order left the pending list. PR #6510 kept solver data alive by extending the tracked set; this follow-up carries the same retention logic over to cancellation attempts and hardens the progress-bar updaters so they only touch Jotai state once an order ID exists, eliminating the max-depth loops we hit while testing.

[vercel]

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Project	Deployment	Preview	Updated (UTC)
cowfi	Canceled		Nov 12, 2025 2:24pm
explorer-dev	Ready	Preview	Nov 12, 2025 2:24pm
swap-dev	Ready	Preview	Nov 12, 2025 2:24pm
widget-configurator	Ready	Preview	Nov 12, 2025 2:24pm

2 Skipped Deployments

Project	Deployment	Preview	Updated (UTC)
cosmos	Ignored		Nov 12, 2025 2:24pm
sdk-tools	Ignored	Preview	Nov 12, 2025 2:24pm

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/cancellation-message

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[elena-zh]

LGTM, thank you!

[limitofzero]

@fairlighteth nice work, thank you!