fix(ui): make the article title selectable

The title Text sat outside any SelectionContainer, so the headword
could not be copied.

app/src/main/java/com/example/research/ui/article/ArticleScreen.kt

@@ -248,6 +248,7 @@ fun ArticleTitleBar(
                 }
             }
 
+            SelectionContainer {
                 Text(
                     text = title,
                     style = MaterialTheme.typography.dictionaryTitleLarge,
@@ -262,6 +263,7 @@ fun ArticleTitleBar(
             }
         }
     }
+}
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable