Add input mode for custom time minutes in quiz view

Enhance quiz view layout for game mode selection

Implement custom time limit in minutes for quiz settings

Add game mode functionality to quiz component

Refactor QuizTest to use Operation enum for subtraction logic

Remove label display from operation buttons in quiz view for cleaner UI

Merge pull request #2 from cardhouse/claude/add-subtraction-quiz-HoRbM

Refactor operations to use enum architecture and add comprehensive tests

Add subtraction quiz with extensible operation architecture

Merge pull request #1 from cardhouse/copilot/fix-double-tap-zoom-issue

Fix mobile double-tap zoom on number buttons

Initial plan

Game is made, pushing up to repo