补齐DirectProject历史完成项锚点

Thread Manager订阅在内存锚点为空时读取持久化最后item ID\n保持重启恢复与历史懒加载锚点一致

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

@@ -530,6 +530,18 @@ pub(crate) fn read_direct_project_history_items_slice_at(
     Ok((items[start..end].to_vec(), start > 0))
 }
 
+pub(crate) fn read_direct_project_last_item_id_at(root: &Path) -> Result<Option<String>, String> {
+    Ok(read_direct_project_history_items_at(root)?
+        .into_iter()
+        .rev()
+        .find_map(|item| {
+            item.get("id")
+                .and_then(Value::as_str)
+                .filter(|id| !id.is_empty())
+                .map(str::to_string)
+        }))
+}
+
 pub(crate) fn read_direct_project_chat_history_at(
     root: &Path,
 ) -> Result<LocalConversationResult, String> {

apps/ai-game-creator-shell/src-tauri/src/commands.rs

@@ -1,5 +1,5 @@
 use super::*;
-use crate::agent::read_direct_project_chat_history_at;
+use crate::agent::{read_direct_project_chat_history_at, read_direct_project_last_item_id_at};
 use crate::ui_editor::resource::font::FontAsset;
 use sha2::{Digest, Sha256};
 use std::collections::{BTreeMap, HashSet};
@@ -5282,7 +5282,11 @@ pub(crate) fn subscribe_direct_project_thread(
     let root = Path::new(project_path.trim());
     enforce_project_permission_policy(root, "conversation.read")?;
     let thread_id = root.to_string_lossy().into_owned();
-    Ok(subscribe_direct_thread(&thread_id))
+    let mut bootstrap = subscribe_direct_thread(&thread_id);
+    if bootstrap.last_completed_item_id.is_none() {
+        bootstrap.last_completed_item_id = read_direct_project_last_item_id_at(root)?;
+    }
+    Ok(bootstrap)
 }
 
 #[tauri::command]