chore: simplify Google Analytics to standard implementation

[dleffel]

Summary

This PR simplifies the Google Analytics implementation by removing Consent Mode v2 and cookieless tracking features in favor of Google's standard out-of-the-box gtag.js pattern.

Changes

• ✅ Remove Consent Mode v2 implementation
• ✅ Remove URL passthrough feature
• ✅ Remove cookieless tracking functionality
• ✅ Switch to Google's standard gtag.js loading pattern
• ✅ Maintain consent-based loading (scripts only load after user consent)
• ✅ Simplify type definitions

Rationale

The standard out-of-the-box implementation is more stable and complies with consent requirements. The cookieless tracking wasn't working properly, and the effort to get it working isn't worth the added complexity.

Benefits:

• More stable: Using Google's recommended implementation pattern
• Simpler: Reduced code complexity from 153 lines to 68 lines
• Compliant: Still respects user consent before loading any tracking scripts
• Maintainable: Easier to understand and maintain

Technical Details

The new implementation:

1. Initializes early (Google's recommended pattern)
2. Uses two separate Script tags following Google's official documentation
3. Only loads scripts after user explicitly gives consent
4. Removes all consent mode API calls and URL passthrough configuration

---

Important

Simplifies Google Analytics by removing complex features and adopting standard gtag.js pattern in google-analytics-provider.tsx.

• Behavior:
  • Remove Consent Mode v2 and cookieless tracking from google-analytics-provider.tsx.
  • Switch to standard gtag.js loading pattern, loading scripts only after user consent.
• Code Simplification:
  • Reduce code complexity from 153 lines to 68 lines in google-analytics-provider.tsx.
  • Simplify type definitions for dataLayer and gtag in google-analytics-provider.tsx.
• Rationale:
  • Standard implementation is more stable and compliant with consent requirements.

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[roomote]

Review completed. All previously identified issues have been resolved.

• Remove shouldLoad from useEffect dependency array and simplify consent change callback
• Remove duplicate dataLayer initialization in useEffect

Previous Reviews

• 9ba5562: Review #1

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[github-actions]

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[dleffel]

@roomote address all feedback in this PR.

[roomote]

Fixed the reported issues. All local checks passed.

_{View commit | Revert commit}

[brunobergher]

LGTM