Refactor: Extract RootScreen from MainActivity and fix reply message user

This commit refactors the UI composition logic by extracting it from `MainActivity` into a new, dedicated `RootScreen` composable. This improves the separation of concerns and simplifies `MainActivity`.

Additionally, a bug has been fixed where a replied-to message would incorrectly display the author of the parent message instead of its own author.

Key changes:
- Moved theme setup, permission handling, Long-Poll/Online service management, and navigation graph hosting into the new `RootScreen.kt`.
- `MainActivity` is now significantly simplified, delegating its UI composition to `RootScreen`.
- Corrected the user and group assignment for `replyMessage` in `MessagesRepositoryImpl` to ensure the correct author is displayed.
- Introduced `OnlineFriendsViewModel` to the `FriendsRoute` to separate the logic for online friends.
- Replaced `List` with a custom `ImmutableList` for `photoViewerInfo` state to improve Compose stability.

feature/friends/src/main/kotlin/dev/meloda/fast/friends/navigation/FriendsNavigation.kt

@@ -5,6 +5,7 @@ import androidx.navigation.NavGraphBuilder
 import androidx.navigation.compose.composable
 import dev.meloda.fast.friends.FriendsViewModel
 import dev.meloda.fast.friends.FriendsViewModelImpl
+import dev.meloda.fast.friends.OnlineFriendsViewModelImpl
 import dev.meloda.fast.friends.presentation.FriendsRoute
 import dev.meloda.fast.model.BaseError
 import kotlinx.serialization.Serializable
@@ -20,14 +21,14 @@ fun NavGraphBuilder.friendsScreen(
     onMessageClicked: (userId: Long) -> Unit,
     onScrolledToTop: () -> Unit
 ) {
-    val friendsViewModel: FriendsViewModel = with(activity) {
-        getViewModel<FriendsViewModelImpl>()
-    }
+    val friendsViewModel: FriendsViewModel = activity.getViewModel<FriendsViewModelImpl>()
+    val onlineFriendsViewModel =
+        activity.getViewModel<OnlineFriendsViewModelImpl>()
 
     composable<Friends> {
         FriendsRoute(
-            activity = activity,
             friendsViewModel = friendsViewModel,
+            onlineFriendsViewModel = onlineFriendsViewModel,
             onError = onError,
             onPhotoClicked = onPhotoClicked,
             onMessageClicked = onMessageClicked,

feature/friends/src/main/kotlin/dev/meloda/fast/friends/presentation/RootFriendsScreen.kt

@@ -1,6 +1,5 @@
 package dev.meloda.fast.friends.presentation
 
-import androidx.appcompat.app.AppCompatActivity
 import androidx.compose.animation.animateColorAsState
 import androidx.compose.animation.core.FastOutLinearInEasing
 import androidx.compose.animation.core.animateFloatAsState
@@ -54,17 +53,16 @@ import dev.meloda.fast.ui.theme.LocalHazeState
 import dev.meloda.fast.ui.theme.LocalThemeConfig
 import dev.meloda.fast.ui.util.ImmutableList
 import kotlinx.coroutines.launch
-import org.koin.androidx.viewmodel.ext.android.getViewModel
 
 @OptIn(ExperimentalMaterial3Api::class, ExperimentalHazeMaterialsApi::class)
 @Composable
 fun FriendsRoute(
-    activity: AppCompatActivity,
     friendsViewModel: FriendsViewModel,
+    onlineFriendsViewModel: OnlineFriendsViewModelImpl,
     onError: (BaseError) -> Unit,
     onPhotoClicked: (url: String) -> Unit,
     onMessageClicked: (userid: Long) -> Unit,
-    onScrolledToTop: () -> Unit
+    onScrolledToTop: () -> Unit,
 ) {
     val scope = rememberCoroutineScope()
     val currentTheme = LocalThemeConfig.current
@@ -232,9 +230,7 @@ fun FriendsRoute(
             modifier = Modifier.fillMaxSize(),
         ) { index ->
             FriendsScreen(
-                viewModel = if (index == 0) friendsViewModel else with(activity) {
-                    getViewModel<OnlineFriendsViewModelImpl>()
-                },
+                viewModel = if (index == 0) friendsViewModel else onlineFriendsViewModel,
                 orderType = orderType,
                 padding = padding,
                 tabIndex = index,

feature/messageshistory/src/main/kotlin/dev/meloda/fast/messageshistory/model/UiItem.kt

@@ -1,5 +1,6 @@
 package dev.meloda.fast.messageshistory.model
 
+import androidx.compose.runtime.Stable
 import androidx.compose.ui.text.AnnotatedString
 import dev.meloda.fast.common.model.UiImage
 import dev.meloda.fast.model.api.domain.VkAttachment
@@ -9,6 +10,7 @@ sealed class UiItem(
     open val cmId: Long
 ) {
 
+    @Stable
     data class Message(
         override val id: Long,
         override val cmId: Long,
@@ -35,6 +37,7 @@ sealed class UiItem(
         val replySummary: String?
     ) : UiItem(id, cmId)
 
+    @Stable
     data class ActionMessage(
         override val id: Long,
         override val cmId: Long,

feature/photoviewer/src/main/kotlin/dev/meloda/fast/photoviewer/presentation/PhotoViewScreen.kt

@@ -1,6 +1,5 @@
 package dev.meloda.fast.photoviewer.presentation
 
-import android.content.Intent
 import android.widget.Toast
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.core.Animatable
@@ -59,9 +58,9 @@ import dev.meloda.fast.photoviewer.model.PhotoViewScreenState
 import dev.meloda.fast.ui.R
 import dev.meloda.fast.ui.components.FullScreenDialog
 import dev.meloda.fast.ui.components.Loader
+import dev.meloda.fast.ui.util.ImmutableList
 import dev.meloda.fast.ui.util.getImage
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.flow.distinctUntilChanged
 import kotlinx.coroutines.launch
 import org.koin.androidx.compose.koinViewModel
 import java.net.URLEncoder
@@ -69,7 +68,7 @@ import kotlin.math.abs
 
 @Composable
 fun PhotoViewDialog(
-    photoViewerInfo: Pair<List<String>, Int?>?,
+    photoViewerInfo: Pair<ImmutableList<String>, Int?>?,
     modifier: Modifier = Modifier,
     onDismiss: () -> Unit
 ) {
@@ -85,7 +84,7 @@ fun PhotoViewDialog(
                     arguments = PhotoViewArguments(
                         imageUrls = photoViewerInfo.first.map {
                             URLEncoder.encode(it, "utf-8")
-                        },
+                        }.toList(),
                         selectedIndex = photoViewerInfo.second
                     ),
                     applicationContext = applicationContext