Some random tweaks made on a train 🚆 (#4636)

* Fix the search text field's tint colour.

* Don't allow optional content IDs in the placeholder avatar.

* Use SwiftUI to resolve the hex values in the Inspector app.

This fixes incorrect values being shown in dark/high-contrast modes.

* Fix a layout bug with the colour swatch in the Inspector app on iPhone.

* Switch to the chats tab when selecting a room with the global search screen.

* Run the latest SwiftFormat.

ElementX/Sources/FlowCoordinators/ChatsFlowCoordinator.swift

@@ -11,6 +11,7 @@ import MatrixRustSDK
 import SwiftUI
 
 enum ChatsFlowCoordinatorAction {
+    case switchToChatsTab
     case showSettings
     case showChatBackupSettings
     case sessionVerification(SessionVerificationScreenFlow)
@@ -661,6 +662,7 @@ class ChatsFlowCoordinator: FlowCoordinatorProtocol {
                 case .select(let roomID):
                     dismissGlobalSearch()
                     handleAppRoute(.room(roomID: roomID, via: []), animated: true)
+                    actionsSubject.send(.switchToChatsTab)
                 }
             }
             .store(in: &cancellables)

ElementX/Sources/FlowCoordinators/UserSessionFlowCoordinator.swift

@@ -193,6 +193,8 @@ class UserSessionFlowCoordinator: FlowCoordinatorProtocol {
             .sink { [weak self] action in
                 guard let self else { return }
                 switch action {
+                case .switchToChatsTab:
+                    navigationTabCoordinator.selectedTab = .chats
                 case .showSettings:
                     handleAppRoute(.settings, animated: true)
                 case .showChatBackupSettings: