fix: order screen header inset (#30143)

## **Description**

Perps header regressed on iOS for order screens, including close
position.

## **Changelog**

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CHANGELOG entry: fixes iOS header inset for perps order screens

## **Related issues**

Fixes:

## **Manual testing steps**

```gherkin
Feature: my feature name

  Scenario: user [verb for user action]
    Given [describe expected initial app state]

    When user [verb for user action]
    Then [describe expected outcome]
```

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### **After**

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<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> **Low Risk**
> Low risk UI layout adjustment limited to Perps order/close-position
screens; main risk is unintended spacing changes on devices with/without
notches.
> 
> **Overview**
> Fixes an iOS safe-area regression on Perps order flows by **removing
top safe-area insets from the screen `SafeAreaView`** (`PerpsOrderView`,
`PerpsClosePositionView`) and **applying top inset padding directly in
`PerpsOrderHeader`** via `useSafeAreaInsets`.
> 
> This prevents double/incorrect top padding while keeping bottom
safe-area handling intact.
> 
> <sup>Reviewed by [Cursor Bugbot](https://cursor.com/bugbot) for commit
7a59985. Bugbot is set up for automated
code reviews on this repo. Configure
[here](https://www.cursor.com/dashboard/bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: gambinish

app/components/UI/Perps/Views/PerpsClosePositionView/PerpsClosePositionView.tsx

@@ -569,7 +569,7 @@ const PerpsClosePositionView: React.FC = () => {
   );
 
   return (
-    <SafeAreaView style={styles.container}>
+    <SafeAreaView style={styles.container} edges={['bottom']}>
       <PerpsOrderHeader
         asset={position.symbol}
         price={currentPrice}

app/components/UI/Perps/Views/PerpsOrderView/PerpsOrderView.tsx

@@ -1325,7 +1325,7 @@ const PerpsOrderViewContentBase: React.FC<PerpsOrderViewContentProps> = ({
   }
 
   return (
-    <SafeAreaView style={styles.container} edges={['top', 'bottom']}>
+    <SafeAreaView style={styles.container} edges={['bottom']}>
       {/* Header */}
       <PerpsOrderHeader
         asset={getPerpsDisplaySymbol(orderForm.asset)}

app/components/UI/Perps/components/PerpsOrderHeader/PerpsOrderHeader.tsx

@@ -1,6 +1,7 @@
 import { useNavigation } from '@react-navigation/native';
 import React, { useCallback, useMemo } from 'react';
 import { TouchableOpacity, View } from 'react-native';
+import { useSafeAreaInsets } from 'react-native-safe-area-context';
 import { PerpsOrderHeaderSelectorsIDs } from '../../Perps.testIds';
 import ButtonIcon, {
   ButtonIconSizes,
@@ -54,6 +55,7 @@ const PerpsOrderHeader: React.FC<PerpsOrderHeaderProps> = ({
   const { colors } = useTheme();
   const styles = useMemo(() => createStyles(colors), [colors]);
   const navigation = useNavigation();
+  const { top: topInset } = useSafeAreaInsets();
 
   const handleBack = useCallback(() => {
     if (onBack) {
@@ -96,8 +98,16 @@ const PerpsOrderHeader: React.FC<PerpsOrderHeaderProps> = ({
     }
   }, [priceChange, price]);
 
+  const headerStyle = useMemo(
+    () => [
+      styles.header,
+      topInset > 0 ? { paddingTop: 16 + topInset } : undefined,
+    ],
+    [styles.header, topInset],
+  );
+
   return (
-    <View style={styles.header} testID={PerpsOrderHeaderSelectorsIDs.HEADER}>
+    <View style={headerStyle} testID={PerpsOrderHeaderSelectorsIDs.HEADER}>
       <ButtonIcon
         testID={PerpsOrderHeaderSelectorsIDs.BACK_BUTTON}
         iconName={IconName.ArrowLeft}