fix: route DeFi empty-state CTA to Explore sites

[Prithpal-Sooriya]

Description

This change updates the DeFi empty-state Explore DeFi CTA behavior so it no longer opens the external MetaMask Portfolio explore tokens URL in the in-app browser.

Instead, pressing the CTA now navigates users to the in-app Explore flow and opens the Explore Sites section (TrendingView -> SitesFullView), matching the requested product direction and avoiding the blank page issue.

Changelog

CHANGELOG entry: Fixed the DeFi empty-state Explore button to open the in-app Explore sites screen instead of an external portfolio page.

Related issues

Fixes: #29471 https://consensyssoftware.atlassian.net/browse/ASSETS-3133

Manual testing steps

Feature: DeFi empty-state Explore CTA navigation

  Scenario: user opens Explore from empty DeFi tab
    Given the user is on the DeFi tab with no open positions
    When user taps the "Explore DeFi" button
    Then the app navigates to the Explore Sites screen
    And the app does not open portfolio.metamask.io/explore/tokens

Screenshots/Recordings

Before

N/A

After

https://www.loom.com/share/04b68f115a2c44a190bd7049b5ee323e

https://www.loom.com/share/88e42d07ee06480a90abde1d4771add2

Pre-merge author checklist

• I've followed MetaMask Contributor Docs and MetaMask Mobile Coding Standards.
• I've completed the PR template to the best of my ability
• I've included tests if applicable
• I've documented my code using JSDoc format if applicable
• I've applied the right labels on the PR (see labeling guidelines). Not required for external contributors.

Performance checks (if applicable)

• I've tested on Android
• I've tested with a power user scenario
• I've instrumented key operations with Sentry traces for production performance metrics

Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

  

[github-actions]

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[Prithpal-Sooriya]

LGTM

[Prithpal-Sooriya]

👍🏾

[github-actions]

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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

See analysis details on SonarQube Cloud