Polish mobile fullscreen kiosk menus

[Lee-WonJun]

What changed

• request mobile fullscreen and landscape lock directly from the Game Start tap, with a WebKit fallback
• make the kiosk screen independently scrollable without weakening gameplay touch handling
• redesign short landscape menus with a thinner bezel, compact hardware, five-column language choices, and a three-column guide
• add 844×390 visual evidence and regression coverage for the last language, Game Start accessibility, shell containment, and fullscreen invocation

Why

Mobile browser chrome reduced the landscape viewport enough to clip menu choices. The root page also disabled touch panning globally, so users could not reach clipped controls. Awaiting audio before fullscreen could additionally consume the user activation required by browser fullscreen policy.

Validation

• npm run check
• npm test
• 37/37 browser unit tests
• 15/15 responsive and E2E scenarios
• 6/6 desktop/mobile browser environments
• visual review of 844×390 language and guide captures