fix: 应用 CardStyle marginBottom

internal/tui/model.go

@@ -260,11 +260,13 @@ func (m *model) renderTranslationCard(msg ChatMessage) string {
 			Render(outputContent)
 	}
 
-	return lipgloss.JoinVertical(
+	return CardStyle.Render(
-		lipgloss.Top,
+		lipgloss.JoinVertical(
-		metaBlock,
+			lipgloss.Top,
-		inputBlock,
+			metaBlock,
-		outputBlock,
+			inputBlock,
+			outputBlock,
+		),
 	) + "\n"
 }