Refactor command selection handling.

- Removed `CommandSelectionRouting.kt` and its associated tests, moving command availability logic into the `MessageComposerViewModel`.
- Added `snackbarHostState` to `MessageComposerParams` and `MessageComposer` to support displaying validation errors and transient notifications like unavailable commands.
- Updated `MessageComposer` to collect events from `MessageComposerViewModel` and show relevant snackbar messages.
- Updated `AttachmentPickerMenu` and `ChatComponentFactory` to align with the new command selection and snackbar logic.
- Exposed `events` flow in `MessageComposerViewModel` and updated public API signatures.

Author: andremion

stream-chat-android-compose/api/stream-chat-android-compose.api

@@ -1938,7 +1938,7 @@ public final class io/getstream/chat/android/compose/ui/messages/composer/Compos
 
 public final class io/getstream/chat/android/compose/ui/messages/composer/MessageComposerKt {
 	public static final fun MessageComposer (Lio/getstream/chat/android/compose/viewmodel/messages/MessageComposerViewModel;Landroidx/compose/ui/Modifier;ZLkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lio/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions;Lkotlin/jvm/functions/Function4;Landroidx/compose/runtime/Composer;III)V
-	public static final fun MessageComposer (Lio/getstream/chat/android/ui/common/state/messages/composer/MessageComposerState;Lkotlin/jvm/functions/Function2;Landroidx/compose/ui/Modifier;ZLkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lio/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions;Lkotlin/jvm/functions/Function4;Landroidx/compose/runtime/Composer;III)V
+	public static final fun MessageComposer (Lio/getstream/chat/android/ui/common/state/messages/composer/MessageComposerState;Lkotlin/jvm/functions/Function2;Landroidx/compose/ui/Modifier;ZLkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Landroidx/compose/material3/SnackbarHostState;Lio/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions;Lkotlin/jvm/functions/Function4;Landroidx/compose/runtime/Composer;III)V
 }
 
 public final class io/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions {
@@ -4708,8 +4708,8 @@ public final class io/getstream/chat/android/compose/ui/theme/MessageComposerLin
 
 public final class io/getstream/chat/android/compose/ui/theme/MessageComposerParams {
 	public static final field $stable I
-	public fun <init> (Lio/getstream/chat/android/ui/common/state/messages/composer/MessageComposerState;Lkotlin/jvm/functions/Function4;Landroidx/compose/ui/Modifier;ZLkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lio/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;)V
-	public synthetic fun <init> (Lio/getstream/chat/android/ui/common/state/messages/composer/MessageComposerState;Lkotlin/jvm/functions/Function4;Landroidx/compose/ui/Modifier;ZLkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lio/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public fun <init> (Lio/getstream/chat/android/ui/common/state/messages/composer/MessageComposerState;Lkotlin/jvm/functions/Function4;Landroidx/compose/ui/Modifier;ZLkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lio/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Landroidx/compose/material3/SnackbarHostState;)V
+	public synthetic fun <init> (Lio/getstream/chat/android/ui/common/state/messages/composer/MessageComposerState;Lkotlin/jvm/functions/Function4;Landroidx/compose/ui/Modifier;ZLkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lio/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Landroidx/compose/material3/SnackbarHostState;ILkotlin/jvm/internal/DefaultConstructorMarker;)V
 	public final fun component1 ()Lio/getstream/chat/android/ui/common/state/messages/composer/MessageComposerState;
 	public final fun component10 ()Lkotlin/jvm/functions/Function1;
 	public final fun component11 ()Lkotlin/jvm/functions/Function1;
@@ -4718,6 +4718,7 @@ public final class io/getstream/chat/android/compose/ui/theme/MessageComposerPar
 	public final fun component14 ()Lio/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions;
 	public final fun component15 ()Lkotlin/jvm/functions/Function1;
 	public final fun component16 ()Lkotlin/jvm/functions/Function0;
+	public final fun component17 ()Landroidx/compose/material3/SnackbarHostState;
 	public final fun component2 ()Lkotlin/jvm/functions/Function4;
 	public final fun component3 ()Landroidx/compose/ui/Modifier;
 	public final fun component4 ()Z
@@ -4726,8 +4727,8 @@ public final class io/getstream/chat/android/compose/ui/theme/MessageComposerPar
 	public final fun component7 ()Lkotlin/jvm/functions/Function1;
 	public final fun component8 ()Lkotlin/jvm/functions/Function1;
 	public final fun component9 ()Lkotlin/jvm/functions/Function0;
-	public final fun copy (Lio/getstream/chat/android/ui/common/state/messages/composer/MessageComposerState;Lkotlin/jvm/functions/Function4;Landroidx/compose/ui/Modifier;ZLkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lio/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;)Lio/getstream/chat/android/compose/ui/theme/MessageComposerParams;
-	public static synthetic fun copy$default (Lio/getstream/chat/android/compose/ui/theme/MessageComposerParams;Lio/getstream/chat/android/ui/common/state/messages/composer/MessageComposerState;Lkotlin/jvm/functions/Function4;Landroidx/compose/ui/Modifier;ZLkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lio/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;ILjava/lang/Object;)Lio/getstream/chat/android/compose/ui/theme/MessageComposerParams;
+	public final fun copy (Lio/getstream/chat/android/ui/common/state/messages/composer/MessageComposerState;Lkotlin/jvm/functions/Function4;Landroidx/compose/ui/Modifier;ZLkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lio/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Landroidx/compose/material3/SnackbarHostState;)Lio/getstream/chat/android/compose/ui/theme/MessageComposerParams;
+	public static synthetic fun copy$default (Lio/getstream/chat/android/compose/ui/theme/MessageComposerParams;Lio/getstream/chat/android/ui/common/state/messages/composer/MessageComposerState;Lkotlin/jvm/functions/Function4;Landroidx/compose/ui/Modifier;ZLkotlin/jvm/functions/Function2;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Lio/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions;Lkotlin/jvm/functions/Function1;Lkotlin/jvm/functions/Function0;Landroidx/compose/material3/SnackbarHostState;ILjava/lang/Object;)Lio/getstream/chat/android/compose/ui/theme/MessageComposerParams;
 	public fun equals (Ljava/lang/Object;)Z
 	public final fun getInput ()Lkotlin/jvm/functions/Function4;
 	public final fun getMessageComposerState ()Lio/getstream/chat/android/ui/common/state/messages/composer/MessageComposerState;
@@ -4744,6 +4745,7 @@ public final class io/getstream/chat/android/compose/ui/theme/MessageComposerPar
 	public final fun getOnUserSelected ()Lkotlin/jvm/functions/Function1;
 	public final fun getOnValueChange ()Lkotlin/jvm/functions/Function1;
 	public final fun getRecordingActions ()Lio/getstream/chat/android/compose/ui/messages/composer/actions/AudioRecordingActions;
+	public final fun getSnackbarHostState ()Landroidx/compose/material3/SnackbarHostState;
 	public fun hashCode ()I
 	public final fun isAttachmentPickerVisible ()Z
 	public fun toString ()Ljava/lang/String;
@@ -6701,6 +6703,7 @@ public final class io/getstream/chat/android/compose/viewmodel/messages/MessageC
 	public static synthetic fun completeRecording$default (Lio/getstream/chat/android/compose/viewmodel/messages/MessageComposerViewModel;Lkotlin/jvm/functions/Function1;ILjava/lang/Object;)V
 	public final fun createPoll (Lio/getstream/chat/android/models/CreatePollParams;)V
 	public final fun dismissMessageActions ()V
+	public final fun getEvents ()Lkotlinx/coroutines/flow/SharedFlow;
 	public final fun getInputFocusEvents ()Lkotlinx/coroutines/flow/SharedFlow;
 	public final fun getMessageComposerState ()Lkotlinx/coroutines/flow/StateFlow;
 	public final fun getMessageInput ()Lkotlinx/coroutines/flow/StateFlow;

stream-chat-android-compose/src/main/java/io/getstream/chat/android/compose/ui/messages/attachments/AttachmentPickerMenu.kt

@@ -29,12 +29,10 @@ import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalFocusManager
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import io.getstream.chat.android.compose.ui.messages.ChannelScreen
-import io.getstream.chat.android.compose.ui.messages.composer.internal.routeCommandSelection
 import io.getstream.chat.android.compose.ui.theme.AttachmentPickerParams
 import io.getstream.chat.android.compose.ui.theme.ChatTheme
 import io.getstream.chat.android.compose.util.isKeyboardVisibleAsState
@@ -98,8 +96,7 @@ public fun AttachmentPickerMenu(
         else -> 350.dp
     }
 
-    val context = LocalContext.current
-    val actions = remember(attachmentsPickerViewModel, composerViewModel, composerState.action) {
+    val actions = remember(attachmentsPickerViewModel, composerViewModel) {
         val baseActions = AttachmentPickerActions.defaultActions(attachmentsPickerViewModel, composerViewModel)
         baseActions.copy(
             onCreatePollClick = {
@@ -116,7 +113,7 @@ public fun AttachmentPickerMenu(
             },
             onCommandSelected = { command ->
                 isShowingDialog = false
-                routeCommandSelection(command, composerState.action, context, baseActions.onCommandSelected)
+                baseActions.onCommandSelected(command)
             },
             onDismiss = {
                 isShowingDialog = false