User verification state indicators (#3793)

* Introduce a `UserIdentityProxy` and have it combine upstream methods into an easy to digest  `UserIdentityVerificationState`. Use it in a dedicated `VerificationBadge` UI component

* Show a DMs counterpart verification state in the room header

* Show a warning on the room details `People` entry when there are identity verification state violations on any of the members.

* Show verification badges in the room member list

* Show a withdraw verification section on the room member details for users that have pinning violations.

* Remove the verification section from the profile screen as there's no reliable way to keep it up to date
- the underlying Rust SDK Olm Machine can be rebuilt without notice which would break any existing user identity change streams.

* Update preview test snapshots

ElementX/Sources/Screens/RoomScreen/RoomScreenModels.swift

@@ -31,6 +31,7 @@ enum RoomScreenViewAction {
 struct RoomScreenViewState: BindableState {
     var roomTitle = ""
     var roomAvatar: RoomAvatar
+    var dmRecipientVerificationState: UserIdentityVerificationState?
     
     var lastScrollDirection: ScrollDirection?
     // This is used to control the banner

ElementX/Sources/Screens/RoomScreen/RoomScreenViewModel.swift

@@ -77,6 +77,8 @@ class RoomScreenViewModel: RoomScreenViewModelType, RoomScreenViewModelProtocol
         
         Task {
             await handleRoomInfoUpdate(roomProxy.infoPublisher.value)
+            
+            await updateVerificationBadge()
         }
         
         setupSubscriptions(ongoingCallRoomIDPublisher: ongoingCallRoomIDPublisher)
@@ -182,6 +184,7 @@ class RoomScreenViewModel: RoomScreenViewModelType, RoomScreenViewModelProtocol
                 }
                 
                 await self?.processIdentityStatusChanges(changes)
+                await self?.updateVerificationBadge()
             }
         }
         .store(in: &cancellables)
@@ -262,6 +265,23 @@ class RoomScreenViewModel: RoomScreenViewModelType, RoomScreenViewModelProtocol
         }
     }
     
+    private func updateVerificationBadge() async {
+        guard roomProxy.isDirectOneToOneRoom,
+              let dmRecipient = roomProxy.membersPublisher.value.first(where: { $0.userID != roomProxy.ownUserID }),
+              case let .success(userIdentity) = await clientProxy.userIdentity(for: dmRecipient.userID) else {
+            state.dmRecipientVerificationState = .notVerified
+            return
+        }
+        
+        guard let userIdentity else {
+            MXLog.failure("User identity should be known at this point")
+            state.dmRecipientVerificationState = .notVerified
+            return
+        }
+        
+        state.dmRecipientVerificationState = userIdentity.verificationState
+    }
+    
     private func resolveIdentityPinningViolation(_ userID: String) async {
         defer {
             hideLoadingIndicator()

ElementX/Sources/Screens/RoomScreen/View/RoomScreen.swift

@@ -204,6 +204,7 @@ struct RoomScreen: View {
         ToolbarItem(placement: .principal) {
             RoomHeaderView(roomName: roomContext.viewState.roomTitle,
                            roomAvatar: roomContext.viewState.roomAvatar,
+                           dmRecipientVerificationState: roomContext.viewState.dmRecipientVerificationState,
                            mediaProvider: roomContext.mediaProvider)
                 // Using a button stops it from getting truncated in the navigation bar
                 .contentShape(.rect)