test(wallet): cover keyboard navigation

[khaylebfortune]

closes #1019

Summary

Adds comprehensive keyboard navigation tests for wallet components, covering tab order, arrow keys, Enter, and Escape behavior.

Changes

Bug Fix

• WalletItemList.tsx — Added missing useCallback import (production defect causing ReferenceError at runtime).

New Test Files (61 tests, 0 failures)

• EditableWalletRowKeyboard.test.tsx (23) — Tab order in edit mode, Escape to cancel, Enter key behavior, auto-focus, validation error focus, focus ring styles, view mode keyboard access
• WalletBulkToolbarKeyboard.test.tsx (21) — Arrow key navigation (Right/Down/Left/Up wrapping), Home/End, Escape to clear, auto-focus, tab order, Enter/Space activation
• WalletPageKeyboardNavigation.test.tsx (17) — Full page tab order, toolbar keyboard flow, dialog keyboard, shortcuts, copy-address button keyboard activation

Edge Cases Covered

• Tab order: Full Tab/Shift+Tab through edit mode inputs, toolbar buttons, page-level rows
• Arrow keys: ArrowRight/Down/Left/Up with wrapping, Home/End for first/last focusable
• Enter: Button activation (Save/Cancel/Delete/Export), suppression on text inputs
• Escape: Cancel editing, clear selection, close delete dialog
• Disabled elements: Checkbox skipped during edit mode
• Auto-focus: Name input on edit entry, toolbar on selection transition

Test Output

PASS EditableWalletRowKeyboard.test.tsx
PASS WalletBulkToolbarKeyboard.test.tsx
PASS WalletPageKeyboardNavigation.test.tsx

Test Suites: 3 passed, 3 total
Tests:       61 passed, 61 total

Lint

0 errors, 0 warnings on all changed files

Notes

• Deterministic; no real timers (auto-focus via waitFor polling).
• No behavior changes except useCallback import fix.
• Pre-existing failures in page.test.tsx (edit-item-btn missing in inline rows) are unrelated.