Split useFriendRequestWidget into state + actions (flat hooks layout)

Stesso pattern di doorbell / poll / furni-chooser / user-chooser:
flat split sotto src/hooks/rooms/widgets/, no co-location dentro
src/components/.

Split
- src/hooks/rooms/widgets/useFriendRequestState.ts (new):
  activeRequests state + displayedRequests derived (filter su
  dismissedRequestIds) + due bridge events (user added/removed) +
  un useEffect che riallinea activeRequests quando cambia il set
  di requests dal friends-store. Esporta anche il tipo
  ActiveFriendRequest per consumi futuri.
  Plus: ?. su roomSession e userDataManager per evitare il bug
  pattern "session è null in transition" (vedi PetTrainingPanel,
  precedentemente fixato).
- src/hooks/rooms/widgets/useFriendRequestActions.ts (new):
  hideFriendRequest. Thin adapter sul friends-store
  (setDismissedRequestIds), nessuna subscription.
- src/hooks/rooms/widgets/useFriendRequestWidget.ts: deprecated
  shim che compone i due e preserva
  { displayedRequests, hideFriendRequest } per il consumer
  FriendRequestWidgetView.

Verifica
- yarn eslint sui 4 file toccati: 1 errore pre-esistente
  (set-state-in-effect sul useEffect che ri-derive activeRequests
  da requests — già nel file originale, baseline invariata).
- yarn test: 49/49 passing.
- yarn tsc: clean.

Sequence widget split adesso a 5 (doorbell, poll, furni-chooser,
user-chooser, friend-request). Rimangono: usePetPackageWidget,
useWordQuizWidget, useChatInputWidget, useChatWidget,
useAvatarInfoWidget, useFilterWordsWidget.

src/hooks/rooms/widgets/index.ts

@@ -7,6 +7,8 @@ export * from './useDoorbellActions';
 export * from './useDoorbellState';
 export * from './useDoorbellWidget';
 export * from './useFilterWordsWidget';
+export * from './useFriendRequestActions';
+export * from './useFriendRequestState';
 export * from './useFriendRequestWidget';
 export * from './useFurniChooserActions';
 export * from './useFurniChooserState';

src/hooks/rooms/widgets/useFriendRequestActions.ts

@@ -0,0 +1,28 @@
+import { useFriends } from '../../friends';
+
+/**
+ * Imperative actions for the friend-request widget. Stateless — split
+ * from useFriendRequestState so a component that only needs to dismiss
+ * a request doesn't subscribe to the user-added/removed lifecycle.
+ *
+ * The actual dismissal flag lives in the shared friends store
+ * (via `setDismissedRequestIds`), so this hook is a thin adapter.
+ */
+export const useFriendRequestActions = () =>
+{
+    const { setDismissedRequestIds = null } = useFriends();
+
+    return {
+        hideFriendRequest: (userId: number): void =>
+        {
+            if(!setDismissedRequestIds) return;
+
+            setDismissedRequestIds(prevValue =>
+            {
+                if(prevValue.indexOf(userId) >= 0) return prevValue;
+
+                return [ ...prevValue, userId ];
+            });
+        }
+    };
+};

src/hooks/rooms/widgets/useFriendRequestState.ts

@@ -0,0 +1,85 @@
+import { RoomObjectCategory, RoomObjectUserType } from '@nitrots/nitro-renderer';
+import { useEffect, useMemo, useState } from 'react';
+import { GetRoomSession, MessengerRequest } from '../../../api';
+import { useFriends } from '../../friends';
+import { useUserAddedEvent, useUserRemovedEvent } from '../engine';
+
+export interface ActiveFriendRequest
+{
+    roomIndex: number;
+    request: MessengerRequest;
+}
+
+/**
+ * State + event subscriptions for the friend-request room widget.
+ * Pure imperative action (hideFriendRequest) lives in
+ * useFriendRequestActions.
+ */
+export const useFriendRequestState = () =>
+{
+    const [ activeRequests, setActiveRequests ] = useState<ActiveFriendRequest[]>([]);
+    const { requests = [], dismissedRequestIds = [] } = useFriends();
+
+    const displayedRequests = useMemo(
+        () => activeRequests.filter(entry => (dismissedRequestIds.indexOf(entry.request.requesterUserId) === -1)),
+        [ activeRequests, dismissedRequestIds ]
+    );
+
+    useUserAddedEvent(true, event =>
+    {
+        if(event.category !== RoomObjectCategory.UNIT) return;
+
+        const userData = GetRoomSession()?.userDataManager?.getUserDataByIndex(event.id);
+
+        if(!userData || (userData.type !== RoomObjectUserType.getTypeNumber(RoomObjectUserType.USER))) return;
+
+        const request = requests.find(r => (r.requesterUserId === userData.webID));
+
+        if(!request) return;
+
+        setActiveRequests(prev =>
+        {
+            if(prev.find(entry => (entry.request.requesterUserId === userData.webID))) return prev;
+
+            return [ ...prev, { roomIndex: userData.roomIndex, request } ];
+        });
+    });
+
+    useUserRemovedEvent(true, event =>
+    {
+        if(event.category !== RoomObjectCategory.UNIT) return;
+
+        setActiveRequests(prev =>
+        {
+            const index = prev.findIndex(entry => (entry.roomIndex === event.id));
+
+            if(index === -1) return prev;
+
+            const next = [ ...prev ];
+            next.splice(index, 1);
+            return next;
+        });
+    });
+
+    useEffect(() =>
+    {
+        const session = GetRoomSession();
+
+        if(!session) return;
+
+        const next: ActiveFriendRequest[] = [];
+
+        for(const request of requests)
+        {
+            const userData = session.userDataManager?.getUserData(request.requesterUserId);
+
+            if(!userData) continue;
+
+            next.push({ roomIndex: userData.roomIndex, request });
+        }
+
+        setActiveRequests(next);
+    }, [ requests ]);
+
+    return { displayedRequests };
+};

src/hooks/rooms/widgets/useFriendRequestWidget.ts

@@ -1,81 +1,15 @@
-import { RoomObjectCategory, RoomObjectUserType } from '@nitrots/nitro-renderer';
-import { useEffect, useMemo, useState } from 'react';
-import { GetRoomSession, MessengerRequest } from '../../../api';
-import { useFriends } from '../../friends';
-import { useUserAddedEvent, useUserRemovedEvent } from '../engine';
+import { useFriendRequestActions } from './useFriendRequestActions';
+import { useFriendRequestState } from './useFriendRequestState';
 
-const useFriendRequestWidgetState = () =>
+/**
+ * @deprecated Use `useFriendRequestState` and `useFriendRequestActions`
+ * directly. This shim preserves the
+ * `{ displayedRequests, hideFriendRequest }` shape for existing consumers.
+ */
+export const useFriendRequestWidget = () =>
 {
-    const [ activeRequests, setActiveRequests ] = useState<{ roomIndex: number, request: MessengerRequest }[]>([]);
-    const { requests = [], dismissedRequestIds = [], setDismissedRequestIds = null } = useFriends();
-
-    const displayedRequests = useMemo(() => activeRequests.filter(request => (dismissedRequestIds.indexOf(request.request.requesterUserId) === -1)), [ activeRequests, dismissedRequestIds ]);
-
-    const hideFriendRequest = (userId: number) =>
-    {
-        setDismissedRequestIds(prevValue =>
-        {
-            if(prevValue.indexOf(userId) >= 0) return prevValue;
-
-            const newValue = [ ...prevValue ];
-
-            newValue.push(userId);
-
-            return newValue;
-        });
-    };
-
-    useUserAddedEvent(true, event =>
-    {
-        if(event.category !== RoomObjectCategory.UNIT) return;
-
-        const userData = GetRoomSession().userDataManager.getUserDataByIndex(event.id);
-
-        if(!userData || (userData.type !== RoomObjectUserType.getTypeNumber(RoomObjectUserType.USER))) return;
-
-        const request = requests.find(request => (request.requesterUserId === userData.webID));
-
-        if(!request || activeRequests.find(request => (request.request.requesterUserId === userData.webID))) return;
-
-        const newValue = [ ...activeRequests ];
-
-        newValue.push({ roomIndex: userData.roomIndex, request });
-
-        setActiveRequests(newValue);
-    });
-
-    useUserRemovedEvent(true, event =>
-    {
-        if(event.category !== RoomObjectCategory.UNIT) return;
-
-        const index = activeRequests.findIndex(request => (request.roomIndex === event.id));
-
-        if(index === -1) return;
-
-        const newValue = [ ...activeRequests ];
-
-        newValue.splice(index, 1);
-
-        setActiveRequests(newValue);
-    });
-
-    useEffect(() =>
-    {
-        const newDisplayedRequests: { roomIndex: number, request: MessengerRequest }[] = [];
-
-        for(const request of requests)
-        {
-            const userData = GetRoomSession().userDataManager.getUserData(request.requesterUserId);
-
-            if(!userData) continue;
-
-            newDisplayedRequests.push({ roomIndex: userData.roomIndex, request });
-        }
-
-        setActiveRequests(newDisplayedRequests);
-    }, [ requests ]);
+    const { displayedRequests } = useFriendRequestState();
+    const { hideFriendRequest } = useFriendRequestActions();
 
     return { displayedRequests, hideFriendRequest };
 };
-
-export const useFriendRequestWidget = useFriendRequestWidgetState;