refactor(types): drop 127 unnecessary as any casts (#210)

Removed every `as any` in src/, then restored only the ones tsc still
needs: 163 → 36. 112 were in lotus-terminal.css.ts (`'… !important' as
any` etc. — vanilla-extract's style types accept these strings as-is),
so its file-wide eslint-disable goes too. The casts were type-only, so
emitted code and generated CSS are unchanged.

eslint warnings 49 → 46; the ratchet is tightened to match.
tsc clean; 1202 unit tests pass.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA

src/app/plugins/react-custom-html-parser.tsx

@@ -658,7 +658,7 @@ export const getReactCustomHtmlParser = (
               role="button"
               tabIndex={0}
               onKeyDown={(e) => {
-                if (e.key === 'Enter' || e.key === ' ') params.handleSpoilerClick?.(e as any);
+                if (e.key === 'Enter' || e.key === ' ') params.handleSpoilerClick?.(e);
               }}
               onClick={params.handleSpoilerClick}
               className={css.Spoiler()}