feat: add integration tests for isOwnWallet and implement isOwnWallet…

[Stanley-Owoh]

Add integration test for isOwnWallet helper controlling visibility of edit controls

Summary

Edit controls on the creator profile (update bio, change avatar) should only be visible when the viewing wallet matches the creator's own wallet. This PR adds the isOwnWallet helper, wires it into CreatorProfileHeader, and covers the behaviour with integration tests.

Changes

New

• src/utils/isOwnWallet.ts — Pure helper that case-insensitively compares a connected wallet address against a creator address; returns false when either is missing.
• src/utils/__tests__/isOwnWallet.test.ts — Unit tests for the helper (exact match, case-insensitive match, mismatch, null/undefined/empty inputs).
• src/components/common/__tests__/CreatorProfileHeader.isOwnWallet.integration.test.tsx — Integration tests verifying:
  • Edit controls are absent from the DOM for a non-owner wallet
  • Edit controls are present for the owner wallet
  • Address matching is case-insensitive
  • Controls toggle when the connected wallet changes
  • Controls are hidden when no wallet is connected

Modified

• src/components/common/CreatorProfileHeader.tsx — Added connectedWalletAddress prop. Edit buttons ("Edit Bio", "Change Avatar") render conditionally via {own && (...)} so they are absent from the DOM for non-owners.

Acceptance Criteria

• Edit controls hidden for non-owner wallet
• Edit controls visible for owner wallet
• Controls are absent from DOM (not just hidden with CSS) for non-owners

Closes #533