feat: strengthen task workflow and compaction recovery

src/types.ts

@@ -3,7 +3,7 @@ export type TaskStatus = "pending" | "in-progress" | "blocked" | "done";
 export interface Task {
   id: number;
   name: string;
-  description: string;
+  description?: string;
   status: TaskStatus;
   parentId: number | null;
   childrenIds: number[];
@@ -16,7 +16,7 @@ export interface TaskSnapshot {
 
 export interface AddTaskDraft {
   name: string;
-  description: string;
+  description?: string;
   status?: TaskStatus;
   parentId?: number;
   children?: AddTaskDraft[];
@@ -40,7 +40,7 @@ export interface TaskStats {
 }
 
 export interface TaskToolDetails {
-  action: "add" | "update" | "remove" | "list" | "get";
+  action: "add" | "append" | "replace" | "update" | "remove" | "list" | "get";
   snapshot: TaskSnapshot;
   affected: Task[];
   errors?: string[];