Phase 5.3 (1c99c2f5e) wrapped the WS construction in an IIFE so the
gated-mode ticket fetch could resolve asynchronously, but the effect's
top-level cleanup still referenced the IIFE-scoped `const ws`. TypeScript
catches it at build time:
src/pages/ChatPage.tsx:654:7 - error TS2304: Cannot find name 'ws'.
LSP-cache-lag drowned the diagnostic under the JSX-types-missing noise
locally, so the bug shipped uncaught. Switch to `wsRef.current?.close()`
which:
- resolves to the same WebSocket the IIFE assigned (line 562:
`wsRef.current = ws`)
- is null-safe when unmount races the ticket fetch (the IIFE early-
returns on `unmounting` so wsRef.current is never set)
The ChatSidebar.tsx + gatewayClient.ts cleanup paths were already using
this pattern correctly (`ws?.close()` / `ws` was hoisted), so this fix
is ChatPage-only.
af3d4a687f