fix: import roundToSzDecimals to avoid runtime error

[aldin4u]

Description

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Summary by CodeRabbit

• Refactor
  • Optimized internal code organization for improved maintainability and consistency.

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[coderabbitai]

📝 Walkthrough

Walkthrough

Adds a local import of roundToSzDecimals from './math' to enable internal usage within the order module, alongside the existing re-export. No public API changes or behavioral modifications observed.

Changes

Cohort / File(s)	Summary
Internal import addition src/apps/perps/lib/hyperliquid/order.ts	Added local import of roundToSzDecimals from './math' to support internal function usage (e.g., computeSizeUSD) alongside existing re-export

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Suggested reviewers

• IAmKio

Poem

🐰 A tiny import, neat and true,
One line of code, fresh and new,
To round those sizes, small or vast,
The math flows smoothly, unsurpassed!

🚥 Pre-merge checks | ✅ 1 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The pull request description is entirely composed of template placeholders with no actual content, testing details, or checkbox selections provided by the author.	Fill in the Description section explaining why the import is needed, check the appropriate 'Types of changes' box, and document how the fix was tested.
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: importing roundToSzDecimals to fix a runtime error, which aligns with the actual modification in the changeset.

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✨ Finishing touches

• 📝 Generate docstrings

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