add: ShadcnUI and fix mobile layout

frontend and DB code refactor

perf: SWR and optimization

img upload and overflow fix

mobile optimized UI

fix: actions, fonts and test attempt

test: add Playwright E2E suite, CI action, and UI performance optimization

refactor

refactor/perf: light/dark mode + add tests + optimize

chore: color contrast, math render

feat! : removed Email OTP, multiple results

fix: math render and light mode

fix: math fn render

perf: frontend optimize

initial commit