Make onSendMessage parameter not nullable

libraries/textcomposer/impl/src/main/kotlin/io/element/android/libraries/textcomposer/TextComposer.kt

@@ -218,10 +218,10 @@ fun TextComposer(
                         placeholder = placeholder,
                         placeholderColor = ElementTheme.colors.textSecondary,
                         onTyping = onTyping,
+                        onSendMessage = { if (canSendTextMessage) onSendMessage() },
                         onReceiveSuggestion = onReceiveSuggestion,
                         richTextEditorStyle = style,
                         onSelectRichContent = onSelectRichContent,
-                        onSendMessage = { if (canSendTextMessage) onSendMessage() },
                     )
                 }
             }

libraries/textcomposer/impl/src/main/kotlin/io/element/android/libraries/textcomposer/components/markdown/MarkdownTextInput.kt

@@ -51,10 +51,10 @@ fun MarkdownTextInput(
     placeholder: String,
     placeholderColor: androidx.compose.ui.graphics.Color,
     onTyping: (Boolean) -> Unit,
+    onSendMessage: () -> Unit,
     onReceiveSuggestion: (Suggestion?) -> Unit,
     richTextEditorStyle: RichTextEditorStyle,
     onSelectRichContent: ((Uri) -> Unit)?,
-    onSendMessage: (() -> Unit)? = null,
 ) {
     // Copied from io.element.android.wysiwyg.internal.utils.UriContentListener
     class ReceiveUriContentListener(
@@ -217,6 +217,7 @@ internal fun MarkdownTextInputPreview() {
             placeholder = "Placeholder",
             placeholderColor = ElementTheme.colors.textSecondary,
             onTyping = {},
+            onSendMessage = {},
             onReceiveSuggestion = {},
             richTextEditorStyle = style,
             onSelectRichContent = {},