fix(perps): use live price for reverse position orders

[geositta]

Explanation

Sync the perps controller fix from mobile so reverse-position orders no longer use a stale entry price during flip order placement.

The issue was in TradingService.flipPosition(): it passed position.entryPrice as currentPrice for the market flip order. That value could be stale relative to the live market, which meant provider side validation and IOC pricing could use the wrong price and cause reverse position failures. This change removes that stale price from the flip order params so the provider uses live market pricing instead, and it updates the order value analytics fallback accordingly.

This PR also updates the perps controller changelog entry and sync state as part of the standard mobile-to-core sync flow.

References

• Synced from MetaMask Mobile perps controller changes
• Related to mobile branch: perps/fix-reverse-order-price
• Fixes: https://consensyssoftware.atlassian.net/browse/TAT-2946

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've communicated my changes to consumers by updating changelogs for packages I've changed
• I've introduced breaking changes in this PR and have prepared draft pull requests for clients and consumer packages to resolve them

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Note

Medium Risk
Changes perps position-flip order submission by removing fee/balance prechecks and no longer sending a potentially stale currentPrice, which could affect provider-side validation and analytics values if assumptions differ.

Overview
Fixes reverse-position (flip) market orders by stopping flipPosition() from passing position.entryPrice as currentPrice, forcing providers to validate/price against live market data.

Removes the flip fee/balance prevalidation based on ESTIMATED_FEE_RATE, and updates flip analytics ORDER_VALUE to use the executed averagePrice (falling back to entry price) instead. Changelog and .sync-state.json are updated to reflect the synced fix.

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Orphaned constant after removing its only usage

Low Severity

The ESTIMATED_FEE_RATE import was removed from TradingService.ts along with the fee validation block, but the constant itself is still exported from hyperLiquidConfig.ts. A repo-wide search confirms it has zero remaining references — it's now dead code introduced by this change.

 

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[geositta]

core/main already contains these perps-controller changes, so this PR is superseded. The reverse position live price fix and the later follow-up sync changes are now present on main.