fix send button activeness

Signed-off-by: alperozturk96 <alper_ozturk@proton.me>

Author: alperozturk96

app/src/main/java/com/nextcloud/client/assistant/AssistantScreen.kt

@@ -330,6 +330,7 @@ private fun InputBar(
 ) {
     val scope = rememberCoroutineScope()
     val text by viewModel.inputBarText.collectAsState()
+    val chatUIState by chatViewModel.uiState.collectAsState()
 
     Surface(
         tonalElevation = 3.dp,
@@ -387,7 +388,8 @@ private fun InputBar(
                             delay(CHAT_INPUT_DELAY)
                             viewModel.updateInputBarText("")
                         }
-                    }
+                    },
+                    enabled = chatUIState.canSend()
                 ) {
                     Icon(
                         painter = painterResource(id = R.drawable.ic_send),

app/src/main/java/com/nextcloud/client/assistant/chat/ChatContent.kt

@@ -29,6 +29,7 @@ import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.CircleShape
@@ -138,7 +139,7 @@ private fun ChatMessageList(
     messages: List<ChatMessage>,
     showTypingIndicator: Boolean,
     modifier: Modifier = Modifier,
-    listState: androidx.compose.foundation.lazy.LazyListState,
+    listState: LazyListState,
     bottomSlot: (@Composable () -> Unit)? = null
 ) {
     LazyColumn(

app/src/main/java/com/nextcloud/client/assistant/chat/ChatUIState.kt

@@ -17,13 +17,15 @@ sealed class ChatUIState {
     data class Thinking(val messages: List<ChatMessage>) : ChatUIState()
     data class RetryAvailable(val messages: List<ChatMessage>) : ChatUIState()
     data class Error(val messages: List<ChatMessage>, val errorType: ChatErrorType) : ChatUIState()
-}
 
-fun ChatUIState.messages(): List<ChatMessage> = when (this) {
-    is ChatUIState.Content -> messages
-    is ChatUIState.Sending -> messages
-    is ChatUIState.Thinking -> messages
-    is ChatUIState.RetryAvailable -> messages
-    is ChatUIState.Error -> messages
-    is ChatUIState.Loading, is ChatUIState.Empty -> emptyList()
+    fun messages(): List<ChatMessage> = when (this) {
+        is Content -> messages
+        is Sending -> messages
+        is Thinking -> messages
+        is RetryAvailable -> messages
+        is Error -> messages
+        is Loading, is Empty -> emptyList()
+    }
+
+    fun canSend(): Boolean = (this == Empty || this is Content)
 }