test: implement Playwright end-to-end test suite for Web3 (#606)

[Eromosele0110]

Summary

Related Issue

Type of Change

• Feature
• Bug fix
• Refactor
• Documentation

Changes Made

Validation

• cargo fmt --all (if contract changed)
• npm run lint in frontend (if frontend changed)
• Manual verification completed

Screenshots (if UI changes)

Checklist

• Scope is focused and avoids unrelated changes
• Commit messages are clear
• Documentation updated when needed
• ETA was provided when requesting assignment for the linked issue
  close [Frontend] Implement Playwright End-to-End Test Suite for Web3 #606

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[GBOYEE]

@GBOYEE has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Write comprehensive tests covering the affected paths, add CI integration if missing, and ensure all tests pass before PR.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @GBOYEE to this issue.