Claude Code Direct 回合补分段 trace

- claude_code_cli：cc Direct 回合在执行器入口、MCP loopback 就绪、sidecar 启动、sidecar 返回、解析 stream 前各写一条 agent.direct_turn.trace
- direct_runtime：direct_turn_trace 提升为 pub(crate)，让 Claude Code 执行器复用同一份分段留痕

apps/ai-game-creator-shell/src-tauri/src/agent/claude_code_cli.rs

@@ -732,7 +732,9 @@ pub(crate) async fn direct_game_creator_claude_code_chat_at(
     client_turn_id: Option<&str>,
     observer: Option<&mut (dyn FnMut(DirectCodexTurnObservation) + Send)>,
 ) -> Result<String, String> {
+    direct_turn_trace("claude-executor-enter");
     let (mcp_url, mcp_token) = start_external_mcp_loopback(root, llm.web_search_enabled).await?;
+    direct_turn_trace("claude-mcp-loopback-ready");
     let _mcp_guard = ExternalMcpStopGuard;
     let home = crate::project::resolve_local_project_path(root, ".agent/runtime/claude-code/home")?;
     std::fs::create_dir_all(&home)
@@ -742,6 +744,7 @@ pub(crate) async fn direct_game_creator_claude_code_chat_at(
         .lock()
         .ok()
         .and_then(|sessions| sessions.get(&session_key).cloned());
+    direct_turn_trace("claude-sidecar-start");
     let payload = serde_json::json!({
         "type": "turn",
         "id": client_turn_id.unwrap_or("claude-direct-turn"),
@@ -769,6 +772,7 @@ pub(crate) async fn direct_game_creator_claude_code_chat_at(
         client_turn_id,
     )
     .await?;
+    direct_turn_trace("claude-sidecar-done");
     if let Some(session_id) = sidecar
         .result
         .get("session_id")
@@ -785,6 +789,7 @@ pub(crate) async fn direct_game_creator_claude_code_chat_at(
         .filter_map(|event| serde_json::to_string(&event).ok())
         .collect::<Vec<_>>();
     stream.push(String::new());
+    direct_turn_trace("claude-parse-start");
     parse_direct_stream_result(stream.join("\n").as_bytes(), observer)
 }
 

apps/ai-game-creator-shell/src-tauri/src/agent/direct_runtime/mod.rs

@@ -4301,7 +4301,7 @@ pub(crate) fn check_direct_turn_preconditions(
 /// `agent.direct_codex.*` 都没有。窗口就夹在 `begin` 与执行器调用之间，需要知道
 /// 具体停在哪一步。测试态不写，避免污染本机 AppData。
 #[cfg(not(test))]
-fn direct_turn_trace(stage: &str) {
+pub(crate) fn direct_turn_trace(stage: &str) {
     let _ = crate::append_application_log(
         "info".to_string(),
         "direct-turn".to_string(),
@@ -4310,7 +4310,7 @@ fn direct_turn_trace(stage: &str) {
 }
 
 #[cfg(test)]
-fn direct_turn_trace(_stage: &str) {}
+pub(crate) fn direct_turn_trace(_stage: &str) {}
 
 pub(crate) async fn run_direct_game_creator_turn_at_with_creation_type_and_emitter(
     root: &Path,