Robot School

Build a mobile portrait web app called “Robot School”.

Opening: no cover screen — the app opens straight into the live interactive scene (a chalkboard classroom for robots; a 1.5-second teaser of a finished infiltration grade melts into the empty lesson); the title lives inside the scene and any hint dissolves on the first touch.
Core action (draw, choose and time your hesitation): You are the robot infiltrating a human exam: draw a deliberately wobbly line, get one easy question wrong on purpose, hesitate just long enough before confirming — act too perfect and the suspicion meter blows your cover.
Result: an Infiltration Grade card issued by Robot School. Put a real Share button on the result screen (it must post to the Eazo community) and keep Replay next to it.
Visual bar: chalk dust follows every stroke, a suspicion meter twitches when you act too machine, classmates' LED eyes glance over.

Global requirements: mobile-first portrait, touch only, 100dvh with safe areas, no hover dependence. Built-in i18n with exactly two locales (English default, Chinese only after the user taps the EN/中文 toggle placed clear of the status bar), never mix languages on one screen, share output always English. Absolutely no external APIs, no login, no background music. Every control must actually work — no placeholders.