scene: conversation: use Display instead of ToString for clippy++

src/scene/conversation.rs

@@ -1,3 +1,5 @@
+use std::fmt::Display;
+
 use async_openai::types::chat::{ChatCompletionRequestAssistantMessage, ChatCompletionRequestAssistantMessageContent, ChatCompletionRequestMessage, ChatCompletionRequestSystemMessage, ChatCompletionRequestSystemMessageContent, ChatCompletionRequestUserMessage, ChatCompletionRequestUserMessageContent};
 use ratatui::style::{self, Style};
 use serde::{Deserialize, Serialize};
@@ -50,16 +52,16 @@ impl ConversationEntry {
     }
 }
 
-impl ToString for ConversationEntry {
-    fn to_string(&self) -> String {
-        match self {
+impl Display for ConversationEntry {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str(match self {
             ConversationEntry::Spoken(Speaker::Eva, text) => text,
             ConversationEntry::Spoken(Speaker::ShipComputer, text) => text,
             ConversationEntry::StageDirection(text) => text,
             ConversationEntry::SystemMessage(text) => text,
             ConversationEntry::Spoken(Speaker::User, text) => text,
             ConversationEntry::ShipComputerCommand(text) => text
-        }.clone()
+        })
     }
 }