ios: fix interface color without callKit (#4727)

* ios: fix interface color without callKit

* call area

* better hiding sheet when making a call without CallKit

* invert condition

apps/ios/Shared/ContentView.swift

@@ -36,7 +36,7 @@ struct ContentView: View {
     @State private var waitingForOrPassedAuth = true
     @State private var chatListActionSheet: ChatListActionSheet? = nil
 
-    private let callTopPadding: CGFloat = 50
+    private let callTopPadding: CGFloat = 40
 
     private enum ChatListActionSheet: Identifiable {
         case planAndConnectSheet(sheet: PlanAndConnectActionSheet)
@@ -151,12 +151,12 @@ struct ContentView: View {
             }
         }
         .onAppear {
-            reactOnDarkThemeChanges()
+            reactOnDarkThemeChanges(systemInDarkThemeCurrently)
         }
         .onChange(of: colorScheme) { scheme in
             // It's needed to update UI colors when iOS wants to make screenshot after going to background,
             // so when a user changes his global theme from dark to light or back, the app will adapt to it
-            reactOnDarkThemeChanges()
+            reactOnDarkThemeChanges(scheme == .dark)
         }
         .onChange(of: theme.name) { _ in
             ThemeManager.adjustWindowStyle()
@@ -207,7 +207,7 @@ struct ContentView: View {
             CallDuration(call: call)
         }
         .padding(.horizontal)
-        .frame(height: callTopPadding - 10)
+        .frame(height: callTopPadding)
         .background(Color(uiColor: UIColor(red: 47/255, green: 208/255, blue: 88/255, alpha: 1)))
         .onTapGesture {
             chatModel.activeCallViewIsCollapsed = false

apps/ios/Shared/Theme/Theme.swift

@@ -91,8 +91,8 @@ var systemInDarkThemeCurrently: Bool {
     return UITraitCollection.current.userInterfaceStyle == .dark
 }
 
-func reactOnDarkThemeChanges() {
-    if currentThemeDefault.get() == DefaultTheme.SYSTEM_THEME_NAME && CurrentColors.colors.isLight == systemInDarkThemeCurrently {
+func reactOnDarkThemeChanges(_ inDarkNow: Bool) {
+    if currentThemeDefault.get() == DefaultTheme.SYSTEM_THEME_NAME && CurrentColors.colors.isLight == inDarkNow {
         // Change active colors from light to dark and back based on system theme
         ThemeManager.applyTheme(DefaultTheme.SYSTEM_THEME_NAME)
     }

apps/ios/Shared/Views/Chat/ChatInfoView.swift

@@ -671,7 +671,14 @@ private struct CallButton: View {
 
         InfoViewButton(image: image, title: title, disabledLook: !canCall, width: width) {
             if canCall {
-                CallController.shared.startCall(contact, mediaType)
+                if CallController.useCallKit() {
+                    CallController.shared.startCall(contact, mediaType)
+                } else {
+                    // When CallKit is not used, colorscheme will be changed and it will be visible if not hiding sheets first
+                    dismissAllSheets(animated: true) {
+                        CallController.shared.startCall(contact, mediaType)
+                    }
+                }
             } else if contact.nextSendGrpInv {
                 showAlert(SomeAlert(
                     alert: mkAlert(