test: add unit tests for keyboard shortcut hook confirming it does not fire when focus is in a form element (#626)

[abimbolaalabi]

Overview

This PR adds unit tests for the \T\ keyboard shortcut hook in \LandingPage, confirming the handler correctly fires when focus is on the document body and is suppressed when focus is on form elements (\input, \ extarea, \select).

Related Issue

Closes #626

Changes

Keyboard Shortcut Tests

• [ADD] \src/pages/tests/LandingPage.tradeShortcut.test.tsx\
  • Simulates \T\ keydown with focus on \document.body\ and asserts the handler fires (dialog opens)
  • Simulates \T\ keydown with focus on <input>\ and asserts the handler does not fire
  • Simulates \T\ keydown with focus on <textarea>\ and asserts the handler does not fire
  • Simulates \T\ keydown with focus on <select>\ and asserts the handler does not fire

Verification Results

\
pnpm vitest run src/pages/tests/LandingPage.tradeShortcut.test.tsx
✅ 4/4 passed
\\

Acceptance Criteria	Status
Handler fires when focus is on the document body	✅ Passed
Handler suppressed when focus is on an input	✅ Passed
Handler suppressed when focus is on a textarea	✅ Passed
Handler suppressed when focus is on a select	✅ Passed

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