fix(wechat): route scheduled task cancel and spec updates through Goose MCP

Pass cancel requests to Goose like create instead of inbound title matching,
and add scheduled_task_update_spec so format or execution constraints update
taskSpec without triggering page delivery guards.

Co-authored-by: Cursor <cursoragent@cursor.com>

agent-side-effect-tools.test.mjs

@@ -0,0 +1,43 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import {
+  commitAgentSideEffectTool,
+  executeScheduledTaskUpdateSpecTool,
+} from './agent-side-effect-tools.mjs';
+
+test('executeScheduledTaskUpdateSpecTool delegates to scheduledTaskService.updateTaskSpec', async () => {
+  const calls = [];
+  const task = await executeScheduledTaskUpdateSpecTool({
+    taskId: 'task-1',
+    taskSpec: '新规范',
+    mergeTaskSpec: true,
+  }, {
+    userId: 'user-1',
+    scheduledTaskService: {
+      async updateTaskSpec(payload) {
+        calls.push(payload);
+        return { id: 'task-1', taskSpec: 'merged spec', title: '新闻' };
+      },
+    },
+  });
+  assert.equal(calls[0].taskId, 'task-1');
+  assert.equal(calls[0].mergeTaskSpec, true);
+  assert.equal(task.title, '新闻');
+});
+
+test('commitAgentSideEffectTool supports scheduled_task_update_spec', async () => {
+  const committed = await commitAgentSideEffectTool('scheduled_task_update_spec', {
+    taskId: 'task-1',
+    taskSpec: '标准格式说明',
+    mergeTaskSpec: true,
+  }, {
+    userId: 'user-1',
+    scheduledTaskService: {
+      async updateTaskSpec() {
+        return { id: 'task-1', taskSpec: '标准格式说明', status: 'active' };
+      },
+    },
+  });
+  assert.equal(committed.kind, 'scheduled_task');
+  assert.equal(committed.updated, true);
+});