Add smart ACK provider for WeChat MP replies

Replace fixed ackText with a rule-based AckProvider that picks
response templates by message type and intent (translate, summary,
rewrite, poster, ppt, mindmap, code, search, schedule). Pure sync,
zero I/O, auto-falls back to config.ackText on any error.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

schedule-intent.mjs

@@ -41,6 +41,30 @@ function parseHourMinute(text) {
   return { hour, minute };
 }
 
+function extractTodoTitle(text) {
+  const original = String(text ?? '').trim();
+  if (!original) return null;
+  const quoted = original.match(/[「『【（(“"']([^」』】）)”"']{1,80})[」』】）)”"']/);
+  if (quoted?.[1]) {
+    const title = quoted[1].trim();
+    if (title) return title;
+  }
+  const trailingCommand = original.match(
+    /^(.{1,80}?)(?:帮我)?(?:设|设置|设下|记)(?:一个|下一个)?(?:待办|代办|带办|代拜)(?:吧|一下)?$/u,
+  );
+  if (trailingCommand?.[1]) {
+    const title = trailingCommand[1].trim();
+    if (title) return title;
+  }
+  const cleaned = original
+    .replace(
+      /^.*?(?:不用提醒|先记一下|帮我记一下|帮我记|记一下|添加待办|添加任务|记个待办|记个任务|设置一个待办|设置一个代办|设置一个带办|设置一个代拜|设置下一个代拜|设下一个代拜|帮我设置一个待办|帮我设置一个代办|帮我设置一个带办|帮我设置一个代拜|待办|代办|带办|代拜|任务)(?:[:：,，、\s]+)?/u,
+      '',
+    )
+    .trim();
+  return cleaned || null;
+}
+
 export function parseScheduleIntent(text) {
   const compact = normalizeText(text);
   if (!compact) return { action: 'none' };
@@ -63,13 +87,51 @@ export function parseScheduleIntent(text) {
     };
   }
 
+  const wantsBalanceAlert = /(余额|钱包|账户).*(不足|低于|提醒|预警|通知)|余额不足|低余额|余额预警/.test(compact);
+  if (wantsBalanceAlert) {
+    const thresholdMatch = compact.match(/(?:低于|少于|不足|小于)(\d{1,6})(?:元|块|rmb|人民币|cny)?/i);
+    const thresholdYuan = thresholdMatch ? Number(thresholdMatch[1]) : null;
+    const thresholdCents = thresholdYuan == null ? null : Math.max(0, Math.round(thresholdYuan * 100));
+    return thresholdCents == null
+      ? { action: 'create_balance_alert', needsClarification: ['threshold'] }
+      : { action: 'create_balance_alert', thresholdCents };
+  }
+
   if (/看看|查看|看下|列出/.test(compact) && /(待办|日程|行程|计划|任务)/.test(compact)) {
     return { action: 'query_schedule' };
   }
 
+  const wantsTodoRecord =
+    /(不用提醒|先记一下|帮我记一下|帮我记|记一下|添加待办|添加任务|记个待办|记个任务|设置一个待办|设置一个代办|设置一个带办|设置一个代拜|设置下一个代拜|设下一个代拜|帮我设置一个待办|帮我设置一个代办|帮我设置一个带办|帮我设置一个代拜|待办|代办|带办|代拜|任务)/.test(
+      compact,
+    );
+  if (wantsTodoRecord) {
+    const explicitNoReminder = /(不用提醒|不提醒|先记一下)/.test(compact);
+    const hasScheduleTime = /(提醒|闹钟|叫我|今天|今晚|明天|后天|早上|上午|中午|下午|晚上|[0-9零一二两三四五六七八九十]{1,3}(点|:|：))/.test(
+      compact,
+    );
+    if (!explicitNoReminder && hasScheduleTime) {
+      return { action: 'schedule_agent' };
+    }
+    const title = extractTodoTitle(text);
+    if (!title) {
+      return { action: 'create_todo', needsClarification: ['todo_title'] };
+    }
+    return { action: 'create_todo', title };
+  }
+
   return { action: 'none' };
 }
 
 export function isScheduleIntent(intent) {
   return intent?.action && intent.action !== 'none';
 }
+
+export function shouldUseScheduleAssistant(text) {
+  const compact = normalizeText(text);
+  if (!compact) return false;
+  if (isScheduleIntent(parseScheduleIntent(text))) return true;
+  const scheduleKeywords = /(提醒|待办|代办|带办|代拜|日程|行程|安排|计划|闹钟)/;
+  const timeKeywords = /(今天|今晚|明天|后天|早上|上午|中午|下午|晚上|\d{1,2}[点:：])/;
+  return scheduleKeywords.test(compact) && timeKeywords.test(compact);
+}