fix: 错误系统重构、消除静默吞错、update 修复、文档同步

src/core/task-parser.ts

@@ -1,4 +1,5 @@
 import type { TaskItem } from "../types.ts";
+import { CommandError } from "../cli/errors.ts";
 
 export function parseTasks(content: string): TaskItem[] {
   const tasks: TaskItem[] = [];
@@ -15,7 +16,7 @@ export function parseTasks(content: string): TaskItem[] {
   return tasks;
 }
 
-export class TaskFormatError extends Error {
+export class TaskFormatError extends CommandError {
   constructor(message: string) {
     super(message);
     this.name = this.constructor.name;