fix: CI Prettier, P1-6 poll button, P1-11 stale knock state

- LOTUS_TODO.md: Prettier formatting (CI gate fix)
- P1-6: Wire PollCreator into RoomInput — poll button (Icons.OrderList)
  opens modal, renders PollCreator when pollOpen is true
- P1-11: Reset knocked + knockError on room.roomId change via useEffect;
  add missing useEffect import to RoomIntro.tsx

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/components/room-intro/RoomIntro.tsx

@@ -1,4 +1,4 @@
-import React, { useCallback, useState } from 'react';
+import React, { useCallback, useEffect, useState } from 'react';
 import FocusTrap from 'focus-trap-react';
 import {
   Avatar,
@@ -46,6 +46,11 @@ export const RoomIntro = as<'div', RoomIntroProps>(({ room, ...props }, ref) =>
   const [knocked, setKnocked] = useState(false);
   const [knockError, setKnockError] = useState<string | undefined>();
 
+  useEffect(() => {
+    setKnocked(false);
+    setKnockError(undefined);
+  }, [room.roomId]);
+
   const createEvent = getStateEvent(room, StateEvent.RoomCreate);
   const avatarMxc = useRoomAvatar(room, mDirects.has(room.roomId));
   const name = useLocalRoomName(room);