Add RTL tests for the useWallet hook covering Freighter connect, disconnect, and error paths

[1nonlypiece]

📌 Description

src/hooks/useWallet.ts manages Freighter connection state (connect,
disconnect, auto-detect on mount, error handling) but has no test coverage.
This hook gates all wallet-dependent flows, so its connect/disconnect/error
transitions must be verified.

This issue adds tests for useWallet, mocking @stellar/freighter-api.

Goal: prove useWallet correctly reflects connected/disconnected/error
state across mount, connect, disconnect, and Freighter failures.

🎯 Requirements and Context

• Mock getAddress from @stellar/freighter-api.
• Cover: auto-detect on mount when already connected; connect populating
  address/connected; result.error path setting error and clearing
  connection; thrown-exception path; disconnect resetting all state.
• Use @testing-library/react renderHook.

🛠️ Suggested Execution

1. Create a branch

git checkout -b feature/use-wallet-tests

2. Implement changes

• Add src/hooks/__tests__/useWallet.test.ts.
• Mock the Freighter API per scenario.

3. Test and commit

• Run npm test.
• Edge cases: getAddress returns { error }, returns no address, throws,
  resolves with an address, repeated connect calls.

Example commit message

test: cover useWallet connect/disconnect/error paths

✅ Guidelines

• Minimum 95% test coverage on the hook.
• Clear, descriptive test names.
• Timeframe: 96 hours.

🏷️ Labels

type-testing · area-frontend · MAYBE REWARDED · GRANTFOX OSS · OFFICIAL CAMPAIGN

💬 Community & Support

• Join the CommitLabs contributor Discord: https://discord.gg/WV7tdYkJk
• Introduce yourself before starting to avoid duplicate work.
• Maintainers triage actively and review fast.

[jakerated-r]

Opened PR #604 for this: https://github.com/Commitlabs-Org/Commitlabs-Frontend/pull/604\n\nValidation:\n- npm test -- --run src/hooks/__tests__/useWallet.test.ts -> 6 passed\n- git diff --check -> passed\n\nFull npm test -- --run is currently red on existing unrelated repository issues; details are in the PR body.