fix: 农历日期计算 - 北京时间 UTC+8，2/24=初八，2/25=初九

skills/system-date/date.js

@@ -1,67 +1,65 @@
 /**
  * System Date Skill
- * 获取当前日期和时间（支持时区）
+ * 获取当前日期和时间（北京时间 UTC+8）
  */
 
 /**
- * 获取当前日期时间
- * @param {string} timezone - 时区 (默认 Asia/Shanghai)
- * @returns {Object} 日期时间信息
+ * 获取北京时间
  */
-function getCurrentDateTime(timezone = 'Asia/Shanghai') {
+function getBeijingTime() {
   const now = new Date();
+  // UTC 时间 + 8 小时 = 北京时间
+  const beijingTime = new Date(now.getTime() + (8 * 60 * 60 * 1000));
+  return beijingTime;
+}
+
+/**
+ * 计算农历日期（2026 年春节 2 月 17 日 = 正月初一）
+ */
+function getLunarDate(beijingDate) {
+  const springFestival = new Date('2026-02-17T00:00:00'); // 春节北京时间
+  const diffMs = beijingDate.getTime() - springFestival.getTime();
+  const daysSince = Math.floor(diffMs / (1000 * 60 * 60 * 24));
+  const lunarDay = daysSince + 1; // 正月初一是第 1 天
   
-  // 转换为指定时区
-  const options = {
-    timeZone: timezone,
-    year: 'numeric',
-    month: 'long',
-    day: 'numeric',
-    weekday: 'long',
-    hour: '2-digit',
-    minute: '2-digit',
-    hour12: false
-  };
-  
-  const formatter = new Intl.DateTimeFormat('zh-CN', options);
-  const parts = formatter.formatToParts(now);
-  
-  const result = {};
-  parts.forEach(part => {
-    result[part.type] = part.value;
-  });
+  if (lunarDay >= 1 && lunarDay <= 30) {
+    return `农历正月初${lunarDay}`;
+  } else {
+    return `农历${lunarDay > 30 ? '二月' : '腊月'}${Math.abs(lunarDay - 30)}`;
+  }
+}
+
+/**
+ * 获取当前日期时间（北京时间）
+ */
+function getCurrentDateTime() {
+  const beijingNow = getBeijingTime();
   
-  // 计算农历日期（基于 2026 年春节 2 月 17 日）
-  const springFestival = new Date('2026-02-17');
-  const daysSince = Math.floor((now - springFestival) / (1000 * 60 * 60 * 24)) + 1;
-  const lunarDate = daysSince > 0 && daysSince <= 30 
-    ? `农历正月初${daysSince}` 
-    : '农历日期需查询黄历';
+  const year = beijingNow.getFullYear();
+  const month = beijingNow.getMonth() + 1;
+  const day = beijingNow.getDate();
+  const weekdays = ['日', '一', '二', '三', '四', '五', '六'];
+  const weekday = `星期${weekdays[beijingNow.getDay()]}`;
   
   return {
     success: true,
-    timezone: timezone,
-    year: result.year,
-    month: result.month,
-    day: result.day,
-    weekday: result.weekday,
-    hour: result.hour,
-    minute: result.minute,
-    fullDate: `${result.year}年${parseInt(result.month)}月${parseInt(result.day)}日`,
-    lunarDate: lunarDate,
-    isoString: now.toISOString()
+    timezone: 'Asia/Shanghai',
+    year: year,
+    month: month,
+    day: day,
+    weekday: weekday,
+    fullDate: `${year}年${month}月${day}日`,
+    lunarDate: getLunarDate(beijingNow),
+    isoString: beijingNow.toISOString()
   };
 }
 
 /**
- * 获取相对日期
- * @param {string} relative - 相对日期 (today, tomorrow, yesterday)
- * @param {string} timezone - 时区
- * @returns {Object} 日期信息
+ * 获取相对日期（北京时间）
  */
-function getRelativeDate(relative = 'today', timezone = 'Asia/Shanghai') {
-  const now = new Date();
-  let targetDate = new Date(now);
+function getRelativeDate(relative = 'today') {
+  const beijingNow = getBeijingTime();
+  let targetDate = new Date(beijingNow);
   
   switch (relative.toLowerCase()) {
     case 'today':
@@ -77,39 +75,22 @@ function getRelativeDate(relative = 'today', timezone = 'Asia/Shanghai') {
       break;
   }
   
-  // 计算农历日期
-  const springFestival = new Date('2026-02-17');
-  const daysSince = Math.floor((targetDate - springFestival) / (1000 * 60 * 60 * 24)) + 1;
-  const lunarDate = daysSince > 0 && daysSince <= 30 
-    ? `农历正月初${daysSince}` 
-    : '农历日期需查询黄历';
-  
-  const options = {
-    timeZone: timezone,
-    year: 'numeric',
-    month: 'long',
-    day: 'numeric',
-    weekday: 'long'
-  };
-  
-  const formatter = new Intl.DateTimeFormat('zh-CN', options);
-  const parts = formatter.formatToParts(targetDate);
-  
-  const result = {};
-  parts.forEach(part => {
-    result[part.type] = part.value;
-  });
+  const year = targetDate.getFullYear();
+  const month = targetDate.getMonth() + 1;
+  const day = targetDate.getDate();
+  const weekdays = ['日', '一', '二', '三', '四', '五', '六'];
+  const weekday = `星期${weekdays[targetDate.getDay()]}`;
   
   return {
     success: true,
     relative: relative,
-    year: result.year,
-    month: result.month,
-    day: result.day,
-    weekday: result.weekday,
-    fullDate: `${result.year}年${parseInt(result.month)}月${parseInt(result.day)}日`,
-    lunarDate: lunarDate,
-    isoString: targetDate.toISOString()
+    year: year,
+    month: month,
+    day: day,
+    weekday: weekday,
+    fullDate: `${year}年${month}月${day}日`,
+    lunarDate: getLunarDate(targetDate),
+    timezone: 'Asia/Shanghai'
   };
 }
 
@@ -126,18 +107,20 @@ function formatDateInfo(dateInfo, includeLunar = true) {
     lines.push(`**农历:** ${dateInfo.lunarDate}`);
   }
   
-  if (dateInfo.timezone) {
-    lines.push(`**时区:** ${dateInfo.timezone}`);
-  }
+  lines.push(`**时区:** ${dateInfo.timezone || 'Asia/Shanghai'}`);
   
   return lines.join('\n');
 }
 
 // 命令行测试
 if (require.main === module) {
+  console.log('=== 北京时间测试 ===');
+  console.log('今天:', new Date(new Date().getTime() + 8*60*60*1000).toISOString());
+  console.log('');
+  
   const arg = process.argv[2] || 'today';
-  const result = getRelativeDate(arg, 'Asia/Shanghai');
+  const result = getRelativeDate(arg);
   console.log(formatDateInfo(result));
 }
 
-module.exports = { getCurrentDateTime, getRelativeDate, formatDateInfo };
+module.exports = { getCurrentDateTime, getRelativeDate, formatDateInfo, getLunarDate, getBeijingTime };