fix: gasless support check in hook useAutomaticGasFeeTokenSelect

[jpuri]

Description

Fix gasless support check in hook useAutomaticGasFeeTokenSelect

Changelog

CHANGELOG entry:

Related issues

Fixes: https://consensyssoftware.atlassian.net/browse/CONF-1047

Manual testing steps

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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---

Note

Low Risk
Low risk: a small conditional change in a confirmation hook that only affects when a gas fee token is auto-selected, with no new data flows or security-sensitive logic.

Overview
Fixes useAutomaticGasFeeTokenSelect so it only auto-selects a non-native gas fee token when gasless is actually supported (isSupported from useIsGaslessSupported), instead of triggering based solely on isSmartTransaction/insufficient balance state.

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🔍 Smart E2E Test Selection

• Selected E2E tags: SmokeConfirmations
• Selected Performance tags: None (no tests recommended)
• Risk Level: medium
• AI Confidence: 90%

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E2E Test Selection:
The change modifies useAutomaticGasFeeTokenSelect.ts to add an isGaslessSupported guard condition before automatically selecting a gas fee token. Previously, the hook would auto-select a gas fee token whenever there was insufficient balance and no token was selected. Now it also requires that gasless transactions are actually supported.

This is a focused bug fix in the EIP-7702 / gasless transaction confirmation flow:

1. The hook is consumed by gas-fee-details-row.tsx in the transaction confirmation UI
2. The change affects gas fee token auto-selection behavior during transaction confirmations
3. This is specifically relevant to EIP-7702 advanced account abstraction features (batch transactions, gas fee token payments) mentioned in SmokeConfirmations

SmokeConfirmations is the appropriate tag as it covers gas fee customization, EIP-7702 account abstraction features, and transaction confirmation flows. No other tags are needed since this is a narrow, focused change to a single hook in the confirmations subsystem with no impact on other feature areas (swaps, accounts, networks, etc.).

Performance Test Selection:
This change is a logic fix in a React hook that adds a boolean guard condition. It does not affect rendering performance, data loading, list rendering, or any performance-sensitive code paths. No performance tests are needed.

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✅ E2E Fixture Validation — Schema is up to date
16 value mismatches detected (expected — fixture represents an existing user).
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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

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