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>

LOTUS_TODO.md

@@ -213,7 +213,7 @@ Parse the `contacts` array and `support_page` URL. Display in Settings → Help
   Cache the response in component state; no repeated fetches.  
    **Where:** `src/app/features/settings/` Help/About panel.  
    **Complexity:** Low — one fetch, display result.  
-**COMPLETED June 2026.** Fetches `/.well-known/matrix/support` via `mx.getHomeserverUrl()`. AbortController cleanup. JSON type guard. Loading state. Clickable `matrix_id` → `matrix.to` link; `email_address` → `mailto:` link (both rendered when both present). `formatRole()` handles all role strings. **Server-side:** CORS `Access-Control-Allow-Origin: *` added to LXC 139 (NPM) for `/.well-known/matrix/support`. Static JSON response configured: `@jared:matrix.lotusguild.org` (admin), support_page `https://matrix.lotusguild.org`.
+  **COMPLETED June 2026.** Fetches `/.well-known/matrix/support` via `mx.getHomeserverUrl()`. AbortController cleanup. JSON type guard. Loading state. Clickable `matrix_id` → `matrix.to` link; `email_address` → `mailto:` link (both rendered when both present). `formatRole()` handles all role strings. **Server-side:** CORS `Access-Control-Allow-Origin: *` added to LXC 139 (NPM) for `/.well-known/matrix/support`. Static JSON response configured: `@jared:matrix.lotusguild.org` (admin), support_page `https://matrix.lotusguild.org`.
 
 ---
 
@@ -228,7 +228,7 @@ Parse the `contacts` array and `support_page` URL. Display in Settings → Help
 - Composer hidden/disabled in server notice rooms (check room type in `RoomInput.tsx`)  
    **Where:** `src/app/features/room/RoomViewHeader.tsx` (badge), `src/app/features/room/RoomInput.tsx` (hide composer when `room.getType() === 'm.server_notice'`).  
    **Complexity:** Low.  
-**COMPLETED June 2026.** "Server Notice" `Chip variant="Warning"` in room header with tooltip. Read-only composer replaced by informational `Box` message. Invite, Room Settings, and Report Room menu items hidden for server-notice rooms (both header three-dot menu and sidebar context menu). Distinct `Icons.Warning` icon for server-notice rooms in `getRoomIconSrc()`. Detection via `room.getType() === 'm.server_notice'` (type-based, not name-based).
+  **COMPLETED June 2026.** "Server Notice" `Chip variant="Warning"` in room header with tooltip. Read-only composer replaced by informational `Box` message. Invite, Room Settings, and Report Room menu items hidden for server-notice rooms (both header three-dot menu and sidebar context menu). Distinct `Icons.Warning` icon for server-notice rooms in `getRoomIconSrc()`. Detection via `room.getType() === 'm.server_notice'` (type-based, not name-based).
 
 ---
 
@@ -305,7 +305,7 @@ Parse the `contacts` array and `support_page` URL. Display in Settings → Help
     If any step is broken, fix it. If all working correctly, close this task with no changes.  
     **[AUDIT REQUIRED]** — Full code audit of spoiler mark in toolbar → event content → timeline renderer.  
     **Complexity:** Low (audit) — fix complexity TBD.  
-**COMPLETED June 2026 — NO CHANGES NEEDED.** Full audit confirmed: spoiler composing (`data-md` + `data-mx-spoiler` in `markdown/inline/rules.ts:99`), MSC4193 stable property name at `types/matrix/common.ts:5`, rendering in `react-custom-html-parser.tsx:461`, image/video spoiler support in `ImageContent.tsx` and `VideoContent.tsx`. All working correctly.
+   **COMPLETED June 2026 — NO CHANGES NEEDED.** Full audit confirmed: spoiler composing (`data-md` + `data-mx-spoiler` in `markdown/inline/rules.ts:99`), MSC4193 stable property name at `types/matrix/common.ts:5`, rendering in `react-custom-html-parser.tsx:461`, image/video spoiler support in `ImageContent.tsx` and `VideoContent.tsx`. All working correctly.
 
 ---
 
@@ -317,7 +317,7 @@ Parse the `contacts` array and `support_page` URL. Display in Settings → Help
 > "URL previews in encrypted rooms are fetched by your homeserver, which sees the URL but not the message content."  
 > **Where:** `src/app/state/settings.ts` line 104 (change default), settings UI file for URL preview toggles (find via grep for `encUrlPreview`).  
 > **Complexity:** Very Low — one default value change + one sentence of UI text.  
-**COMPLETED June 2026.** `encUrlPreview` default → `true`. Encrypted URL preview setting now shows: description text explaining homeserver sees all URLs + `Chip variant="Warning" fill="Soft"` badge "Privacy risk — enabled by default". Plain `urlPreview` setting also got a description. Both labels corrected to "URL Preview" (was "Url Preview").
+> **COMPLETED June 2026.** `encUrlPreview` default → `true`. Encrypted URL preview setting now shows: description text explaining homeserver sees all URLs + `Chip variant="Warning" fill="Soft"` badge "Privacy risk — enabled by default". Plain `urlPreview` setting also got a description. Both labels corrected to "URL Preview" (was "Url Preview").
 
 ---
 

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);

src/app/features/room/RoomInput.tsx

@@ -121,6 +121,7 @@ import { useRoomCreatorsTag } from '../../hooks/useRoomCreatorsTag';
 import { usePowerLevelTags } from '../../hooks/usePowerLevelTags';
 import { useComposingCheck } from '../../hooks/useComposingCheck';
 import { VoiceMessageRecorder } from '../../components/VoiceMessageRecorder';
+import { PollCreator } from './PollCreator';
 
 const GifPicker = React.lazy(() =>
   import('../../components/GifPicker').then((m) => ({ default: m.GifPicker })),
@@ -154,6 +155,7 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
     useEffect(() => {
       setCharCount(0);
     }, [roomId]);
+    const [pollOpen, setPollOpen] = useState(false);
 
     const alive = useAlive();
     const [msgDraft, setMsgDraft] = useAtom(roomIdToMsgDraftAtomFamily(roomId));
@@ -952,6 +954,16 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
                   <Icon src={Icons.SpaceGlobe} size="100" />
                 )}
               </IconButton>
+              <IconButton
+                onClick={() => setPollOpen(true)}
+                aria-label="Create poll"
+                variant="SurfaceVariant"
+                size="300"
+                radii="300"
+                title="Create poll"
+              >
+                <Icon src={Icons.OrderList} size="100" />
+              </IconButton>
               <VoiceMessageRecorder
                 onSend={handleVoiceSend}
                 onError={(err) => {
@@ -995,6 +1007,7 @@ export const RoomInput = forwardRef<HTMLDivElement, RoomInputProps>(
             )
           }
         />
+        {pollOpen && <PollCreator room={room} roomId={roomId} onClose={() => setPollOpen(false)} />}
       </div>
     );
   },