fix(agent): inject Shanghai time into each reply message

103 goosed harness_remember returns remembered:false, so session memory
never carried the time anchor. Prepend buildCurrentTimeAgentPrefix on every
H5 /reply and WeChat agent prompt so the model sees Asia/Shanghai clock.

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

wechat-mp.mjs

@@ -6,8 +6,8 @@ import { developerToolsFromPolicy } from './capabilities.mjs';
 import { mergeMessageContent } from './message-stream.mjs';
 import { reconcileAgentSession } from './session-reconcile.mjs';
 import { isScheduleIntent, parseScheduleIntent, shouldUseScheduleAssistant } from './schedule-intent.mjs';
-import { renderCurrentTimeAnchor } from './user-memory-profile.mjs';
 import { materializeMissingPublicHtmlWrites } from './mindspace-public-finish-sync.mjs';
+import { buildCurrentTimeAgentPrefix } from './user-memory-profile.mjs';
 import { PUBLISH_ROOT_DIR } from './user-publish.mjs';
 import { downloadTemporaryMedia, persistWechatImage } from './wechat-media.mjs';
 import { buildAckText } from './wechat/ack/ack-provider.mjs';
@@ -1098,12 +1098,12 @@ export function buildWechatAgentPrompt(intent) {
       ].join('\n')
     : '';
   const scheduleTimezone = process.env.H5_DEFAULT_TIMEZONE || 'Asia/Shanghai';
+  const currentTimeHint = buildCurrentTimeAgentPrefix({ timezone: scheduleTimezone });
   const scheduleAssistantHint = shouldUseScheduleAssistant(intent?.agentText ?? intent?.content)
     ? [
         '【日程技能要求】这条消息涉及待办、提醒或日程。',
         '开始前先加载 `schedule-assistant` skill，并严格按 skill 里的边界执行。',
         '写入工具时优先使用 startLocal / endLocal / remindLocal（YYYY-MM-DD HH:mm），不要自行估算 Unix 毫秒。',
-        renderCurrentTimeAnchor({ timezone: scheduleTimezone }),
         '只有在 `schedule_create_item` / `schedule_create_reminder` 等工具成功返回后，才能告诉用户“已经设置好了”。',
         intent?.msgId ? `调用 schedule_create_item 时必须传入 sourceMessageId: ${intent.msgId}` : '',
         '',
@@ -1112,6 +1112,7 @@ export function buildWechatAgentPrompt(intent) {
   if (msgType === 'voice') {
     return [
       docxDownloadHint,
+      currentTimeHint,
       scheduleAssistantHint,
       '【微信服务号语音消息】用户通过语音输入，以下是微信识别结果。',
       '',
@@ -1123,6 +1124,7 @@ export function buildWechatAgentPrompt(intent) {
   if (msgType === 'image') {
     return [
       docxDownloadHint,
+      currentTimeHint,
       scheduleAssistantHint,
       '【微信服务号图片消息】用户发送了图片。',
       '如用户没有明确要求，请先根据图片内容给出简短理解，并询问下一步。',
@@ -1135,6 +1137,7 @@ export function buildWechatAgentPrompt(intent) {
   if (msgType === 'location') {
     const location = intent?.location ?? {};
     return [
+      currentTimeHint,
       scheduleAssistantHint,
       '【微信服务号位置消息】用户发送了当前位置。',
       location.label ? `地址：${location.label}` : '',
@@ -1152,6 +1155,7 @@ export function buildWechatAgentPrompt(intent) {
   if (msgType === 'link') {
     const link = intent?.link ?? {};
     return [
+      currentTimeHint,
       scheduleAssistantHint,
       '【微信服务号链接消息】用户分享了链接。',
       link.title ? `标题：${link.title}` : '',
@@ -1162,7 +1166,7 @@ export function buildWechatAgentPrompt(intent) {
       .join('\n');
   }
   const content = String(intent?.agentText ?? intent?.content ?? '').trim();
-  const lines = [];
+  const lines = [currentTimeHint];
   if (docxDownloadHint) lines.push(docxDownloadHint);
   if (pagePublishHint) lines.push(pagePublishHint);
   if (scheduleAssistantHint) lines.push(scheduleAssistantHint);