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/features/lobby/SpaceItem.tsx

@@ -330,7 +330,7 @@ function AddSpaceButton({ item }: { item: HierarchyItem }) {
   };
 
   const handleCreateSpace = () => {
-    openCreateSpaceModal(item.roomId as any);
+    openCreateSpaceModal(item.roomId);
     setCords(undefined);
   };