chore: modernize tooling and apply React standards
Replace ad-hoc setup with oxlint + oxfmt + knip + deslop, add curated custom lint rules and file-size/lint-changed scripts, and drop dead deps. Apply taigrr-react and web-interface standards: cn() helper, precise types over any, exported Props types, data-driven StatusView, and a11y wins (html lang, color-scheme, theme-color).
28 files changed+1551−498
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