android, desktop: open chat on first unread, "scroll" to quoted items that were not loaded (#5140)

* android, desktop: infinity scroll rework

* group corrections

* scroll to quote/unread/top/bottom

* changes

* changes

* changes

* changes

* better

* changes

* fix chat closing on desktop

* fix reading items counter, scrolling to newly appeared message, removed unneeded items loading, only partially visible items marked read

* workaround of showing buttom with arrow down on new messages receiving

* rename param

* fix tests

* comments and removed unused code

* performance optimization

* optimization for loading more items in small chat

* fix loading prev items in loop

* workaround to blinking button with counter

* terminal scroll fix

* different click events for floating buttons

* refactor

* change

* WIP

* refactor

* refactor

* renames

* refactor

* refactor

* change

* mark read problem fix

* fix tests

* fix auto scroll in some situations

* fix scroll to quote when it's near the top loaded area

* refactor

* refactor

* rename

* rename

* fix

* alert when quoted message doesn't exist

* refactor

---------

Co-authored-by: Evgeny Poberezkin <evgeny@poberezkin.com>

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/platform/UI.android.kt

@@ -15,6 +15,7 @@ import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.platform.LocalView
 import chat.simplex.common.AppScreen
 import chat.simplex.common.model.clear
+import chat.simplex.common.model.clearAndNotify
 import chat.simplex.common.views.helpers.*
 import androidx.compose.ui.platform.LocalContext as LocalContext1
 import chat.simplex.res.MR
@@ -75,7 +76,7 @@ actual class GlobalExceptionsHandler: Thread.UncaughtExceptionHandler {
     } else if (chatModel.chatId.value != null) {
       // Since no modals are open, the problem is probably in ChatView
       chatModel.chatId.value = null
-      chatModel.chatItems.clear()
+      chatModel.chatItems.clearAndNotify()
     } else {
       // ChatList, nothing to do. Maybe to show other view except ChatList
     }

apps/multiplatform/common/src/androidMain/kotlin/chat/simplex/common/views/chat/item/CIVideoView.android.kt

@@ -44,3 +44,10 @@ actual fun LocalWindowWidth(): Dp {
     (rect.width() / density).dp
   }
 }
+
+@Composable
+actual fun LocalWindowHeight(): Dp {
+  val view = LocalView.current
+  val density = LocalDensity.current
+  return with(density) { view.height.toDp() }
+}