fix: stable button widtah and disable wrap (#29021)

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## **Description**


https://github.com/user-attachments/assets/fa95c546-2050-4019-a190-7e2edb141e8c


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CHANGELOG entry: Fixed a layout shift that happened when
following/unfollowing traders with high PNL

## **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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Author: xavier-brochard

app/components/Views/Homepage/Sections/TopTraders/components/TraderRow.test.tsx

@@ -1,5 +1,7 @@
 import React from 'react';
+import { StyleSheet } from 'react-native';
 import { screen, fireEvent } from '@testing-library/react-native';
+import type { ReactTestInstance } from 'react-test-renderer';
 import renderWithProvider from '../../../../../../util/test/renderWithProvider';
 import TraderRow from './TraderRow';
 import type { TopTrader } from '../types';
@@ -114,4 +116,91 @@ describe('TraderRow', () => {
     );
     expect(screen.getByTestId('custom-test-id')).toBeOnTheScreen();
   });
+
+  describe('layout stability (prevents Follow/Following toggle shift)', () => {
+    const findAncestor = (
+      start: ReactTestInstance | null,
+      predicate: (node: ReactTestInstance) => boolean,
+    ): ReactTestInstance | null => {
+      let node: ReactTestInstance | null = start;
+      while (node) {
+        if (predicate(node)) return node;
+        node = node.parent;
+      }
+      return null;
+    };
+
+    const resolveMinWidth = (node: ReactTestInstance): number | undefined => {
+      const flat = StyleSheet.flatten(node.props.style) as
+        | { minWidth?: number }
+        | undefined;
+      return flat?.minWidth;
+    };
+
+    it('renders the stats line with numberOfLines=1 so it does not wrap when the button grows', () => {
+      const trader: TopTrader = {
+        ...baseTrader,
+        percentageChange: 28233,
+        pnlValue: 407000,
+      };
+      renderWithProvider(
+        <TraderRow trader={trader} onFollowPress={mockOnFollowPress} />,
+      );
+
+      const roiSegment = screen.getByText('+28233.0%');
+      const statsText = findAncestor(
+        roiSegment,
+        (node) => node.props?.numberOfLines === 1,
+      );
+
+      expect(statsText).not.toBeNull();
+    });
+
+    it('renders the Follow button with a minimum width', () => {
+      renderWithProvider(
+        <TraderRow trader={baseTrader} onFollowPress={mockOnFollowPress} />,
+      );
+
+      const followLabel = screen.getByText('Follow');
+      const buttonWithMinWidth = findAncestor(
+        followLabel,
+        (node) => resolveMinWidth(node) !== undefined,
+      );
+
+      expect(buttonWithMinWidth).not.toBeNull();
+      expect(resolveMinWidth(buttonWithMinWidth as ReactTestInstance)).toBe(96);
+    });
+
+    it('keeps the same minimum width when toggling between Follow and Following', () => {
+      const { rerender } = renderWithProvider(
+        <TraderRow trader={baseTrader} onFollowPress={mockOnFollowPress} />,
+      );
+
+      const followLabel = screen.getByText('Follow');
+      const followButton = findAncestor(
+        followLabel,
+        (node) => resolveMinWidth(node) !== undefined,
+      );
+      const followMinWidth = resolveMinWidth(followButton as ReactTestInstance);
+
+      rerender(
+        <TraderRow
+          trader={{ ...baseTrader, isFollowing: true }}
+          onFollowPress={mockOnFollowPress}
+        />,
+      );
+
+      const followingLabel = screen.getByText('Following');
+      const followingButton = findAncestor(
+        followingLabel,
+        (node) => resolveMinWidth(node) !== undefined,
+      );
+      const followingMinWidth = resolveMinWidth(
+        followingButton as ReactTestInstance,
+      );
+
+      expect(followMinWidth).toBeDefined();
+      expect(followingMinWidth).toBe(followMinWidth);
+    });
+  });
 });

app/components/Views/Homepage/Sections/TopTraders/components/TraderRow.tsx

@@ -105,7 +105,11 @@ const TraderRow: React.FC<TraderRowProps> = ({
             >
               {trader.username}
             </Text>
-            <Text variant={TextVariant.BodySm} fontWeight={FontWeight.Medium}>
+            <Text
+              variant={TextVariant.BodySm}
+              fontWeight={FontWeight.Medium}
+              numberOfLines={1}
+            >
               <Text
                 variant={TextVariant.BodySm}
                 fontWeight={FontWeight.Medium}
@@ -150,6 +154,7 @@ const TraderRow: React.FC<TraderRowProps> = ({
         }
         size={ButtonSize.Sm}
         onPress={() => onFollowPress(trader.id)}
+        twClassName="min-w-[96px]"
       >
         {trader.isFollowing
           ? strings('social_leaderboard.following')