test : added unit tests for MiniGame component - #2

Summary of What Has Been Done

Created components/MiniGame.test.tsx with comprehensive unit tests covering:

• Idle state rendering (SQUASH THE BUGS overlay, Initialize button)
• Game initialization on button click
• Score display at game start (0)
• Lives display (3 hearts)
• Score increment on bug click
• Game over (SYSTEM FAILURE) when all lives are lost
• Reboot button resets the game to idle state

Mocked AudioContext and webkitAudioContext using vi.stubGlobal to prevent Web Audio API errors in the test environment.

Changes Made

• New file: components/MiniGame.test.tsx

Impact it Made

Adds first unit test coverage for the MiniGame component, improving confidence in its core game loop logic and preventing regressions.

Closes #8417.

Note: please assign this PR to the tmdeveloper007 account.