show "Viewed Image" when the model views an image (#4475)

<img width="1022" height="339" alt="Screenshot 2025-09-29 at 4 22 00 PM"
src="https://github.com/user-attachments/assets/12da7358-19be-4010-a71b-496ede6dfbbf"
/>

codex-rs/mcp-server/src/codex_tool_runner.rs

@@ -280,6 +280,7 @@ async fn run_codex_tool_session_inner(
                     | EventMsg::ConversationPath(_)
                     | EventMsg::UserMessage(_)
                     | EventMsg::ShutdownComplete
+                    | EventMsg::ViewImageToolCall(_)
                     | EventMsg::EnteredReviewMode(_)
                     | EventMsg::ExitedReviewMode(_) => {
                         // For now, we do not do anything extra for these