improve(daily-briefing): read yesterday memory note instead of today

skills/daily-briefing/handler.ts

@@ -76,6 +76,9 @@ export async function handler(ctx: any) {
   const now = new Date();
   const dateStr = formatDate(now);
   const weekday = getWeekday(now);
+  const yesterday = new Date(now);
+  yesterday.setDate(yesterday.getDate() - 1);
+  const yesterdayStr = formatDate(yesterday);
 
   // 讀取設定
   const userMd = readWorkspaceFile(workspace, 'USER.md');
@@ -87,7 +90,7 @@ export async function handler(ctx: any) {
   // 讀取待辦與行程
   const todoContent = readWorkspaceFile(workspace, 'TODO.md');
   const scheduleContent = readWorkspaceFile(workspace, 'SCHEDULE.md');
-  const memoryContent = readWorkspaceFile(workspace, `memory/${dateStr}.md`);
+  const memoryContent = readWorkspaceFile(workspace, `memory/${yesterdayStr}.md`);
 
   const todos = parseTodos(todoContent);
   const schedule = parseTodaySchedule(scheduleContent, dateStr);