fix: Implement nonEVM zero balance check to send flow before onAmountInput (#23037)

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## **Description**

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## **Changelog**

This PR adds zero balance check before `onAmountInput` RPC call to
nonEVM send flow amount validations.

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## **Related issues**

Fixes: #22812

## **Manual testing steps**

1. Go to send flow
2. Don't have any Tron / SOL / BTC
3. Try sending it but see "insufficient balance" error

## **Screenshots/Recordings**

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### **Before**

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### **After**



https://github.com/user-attachments/assets/ab16a8fe-7da7-4da5-9ee5-684bb0a62e50



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<!-- CURSOR_SUMMARY -->
---

> [!NOTE]
> Adds a zero-balance pre-check for non-EVM assets in amount validation
and updates tests to cover it.
> 
> - **Validation (useAmountValidation)**:
> - Add non-EVM pre-check `rawBalanceBN.isZero()` to return
`"send.insufficient_funds"` before `onAmountInput` snap validation in
`useAmountValidation.ts`.
>   - Update hook dependencies to include `rawBalanceBN`.
> - **Tests**:
> - Extend `useAmountValidation.test.ts` with SOLANA mocks and a test
asserting error when non-EVM asset balance is zero.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
bf695af. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: OGPoyraz

app/components/Views/confirmations/hooks/send/useAmountValidation.test.ts

@@ -2,7 +2,12 @@ import { waitFor } from '@testing-library/react-native';
 import BN from 'bnjs4';
 
 import { renderHookWithProvider } from '../../../../../util/test/renderWithProvider';
-import { EVM_NATIVE_ASSET, evmSendStateMock } from '../../__mocks__/send.mock';
+import {
+  EVM_NATIVE_ASSET,
+  evmSendStateMock,
+  SOLANA_ASSET,
+  solanaSendStateMock,
+} from '../../__mocks__/send.mock';
 import {
   useAmountValidation,
   validateERC1155Balance,
@@ -320,4 +325,23 @@ describe('useAmountValidation', () => {
     const error = await result.current.validateNonEvmAmountAsync();
     expect(error).toEqual(undefined);
   });
+
+  it('return error when non-EVM asset has zero balance', async () => {
+    jest.spyOn(SendContext, 'useSendContext').mockReturnValue({
+      asset: {
+        ...SOLANA_ASSET,
+        rawBalance: '0x0',
+      },
+      from: MOCK_ADDRESS_1,
+      value: '1',
+    } as unknown as SendContext.SendContextType);
+
+    const { result } = renderHookWithProvider(() => useAmountValidation(), {
+      state: solanaSendStateMock,
+    });
+
+    await waitFor(() =>
+      expect(result.current.amountError).toEqual('Insufficient funds'),
+    );
+  });
 });

app/components/Views/confirmations/hooks/send/useAmountValidation.ts

@@ -34,6 +34,10 @@ export const useAmountValidation = () => {
       return undefined;
     }
 
+    if (rawBalanceBN.isZero()) {
+      return strings('send.insufficient_funds');
+    }
+
     try {
       const result = (await validateAmountWithSnap(
         value || '0',
@@ -49,7 +53,7 @@ export const useAmountValidation = () => {
     } catch (error) {
       return strings('send.invalid_value');
     }
-  }, [value, validateAmountWithSnap, isNonEvmSendType]);
+  }, [value, validateAmountWithSnap, isNonEvmSendType, rawBalanceBN]);
 
   const validateAmountAsync = useCallback(async () => {
     if (!value) {