Conform more of the codebase to strictNullChecks (#10731)

src/stores/right-panel/RightPanelStore.ts

@@ -308,7 +308,7 @@ export default class RightPanelStore extends ReadyWatchingStore {
         if (card.phase === RightPanelPhases.RoomMemberInfo && card.state) {
             // RightPanelPhases.RoomMemberInfo -> needs to be changed to RightPanelPhases.EncryptionPanel if there is a pending verification request
             const { member } = card.state;
-            const pendingRequest = pendingVerificationRequestForUser(member);
+            const pendingRequest = member ? pendingVerificationRequestForUser(member) : undefined;
             if (pendingRequest) {
                 return {
                     phase: RightPanelPhases.EncryptionPanel,

src/stores/right-panel/RightPanelStoreIPanelState.ts

@@ -71,8 +71,8 @@ interface IRightPanelForRoomStored {
     history: Array<IRightPanelCardStored>;
 }
 
-export function convertToStorePanel(cacheRoom: IRightPanelForRoom): IRightPanelForRoomStored {
-    if (!cacheRoom) return cacheRoom;
+export function convertToStorePanel(cacheRoom?: IRightPanelForRoom): IRightPanelForRoomStored | undefined {
+    if (!cacheRoom) return undefined;
     const storeHistory = [...cacheRoom.history].map((panelState) => convertCardToStore(panelState));
     return { isOpen: cacheRoom.isOpen, history: storeHistory };
 }