chore(lint): biome cleanup across services — format, sort imports, drop unused
- discord-gateway: 74 lint errors -> 0 (format, import sorting, unused
imports/vars, dead breath var)
- backend: format + sort imports (11 warnings left: noExplicitAny)
- frontend: remove unused imports, drop dead breathing var, fix
useExhaustiveDependencies (scroll keyed on messages), a11y biome-ignore
for drag surface + stopPropagation container (mouse-only gestures)
- remaining warnings are false positives: index keys on static lists,
<img> in static export (next/image unsupported), noExplicitAny
tsc --noEmit clean on all 3 services; vitest green (60+36).
asepharyana
6293d588bc