diff --git a/app.py b/app.py
index 2eccdab..153a541 100644
--- a/app.py
+++ b/app.py
@@ -398,18 +398,46 @@ def api_calendar_sync():
 @app.route('/api/calendar-sync-all', methods=['GET'])
 @login_required
 def api_calendar_sync_all():
-    """批量查询过去15天~未来15天的钉钉日程，按日期分组返回"""
+    """批量查询过去15天~未来15天的钉钉日程，按日期分组返回，并自动填充到对应日期的 checkin"""
     import json as _json
     from datetime import datetime, timedelta
     today = datetime.now().replace(hour=0, minute=0, second=0, microsecond=0)
     results = []
+    saved_days = 0
     for delta in range(-15, 16):
         d = today + timedelta(days=delta)
         ds = d.strftime('%Y-%m-%d')
         events = _fetch_dingtalk_events(ds)
         if events:
             results.append({'date': ds, 'events': events})
-    return jsonify({'ok': True, 'data': results})
+            # 自动去重填充到对应日期的 checkin
+            existing = get_checkin(ds)
+            data = existing['data'] if existing else {'morning': [], 'evening': [], 'study': []}
+            morning = data.get('morning', [])
+            existing_texts = set()
+            for mi in morning:
+                t = mi if isinstance(mi, str) else mi.get('text', '')
+                if t.strip():
+                    existing_texts.add(t.strip())
+            added = False
+            for evt in events:
+                summary = (evt.get('summary') or '').strip()
+                if not summary:
+                    continue
+                text = f"【{evt['time']}】{summary}" if evt.get('time') else summary
+                loc = evt.get('location', '')
+                if loc:
+                    text += f" @{loc}"
+                text = text.strip()
+                if text not in existing_texts:
+                    morning.append(text)
+                    existing_texts.add(text)
+                    added = True
+            if added:
+                data['morning'] = morning
+                save_checkin(ds, data)
+                saved_days += 1
+    return jsonify({'ok': True, 'data': results, 'saved_days': saved_days})
 
 
 # ── 启动 ──────────────────────────────────────────────
diff --git a/static/app.js b/static/app.js
index 3e39f89..a837f0e 100644
--- a/static/app.js
+++ b/static/app.js
@@ -410,7 +410,7 @@
         var totalDays = data.length;
         var totalEvents = 0;
         data.forEach(function(d){ totalEvents += d.events.length; });
-        summary.innerHTML = '同步完成！共 <b>' + totalDays + '</b> 天有日程，合计 <b>' + totalEvents + '</b> 个会议';
+        summary.innerHTML = '同步完成！共 <b>' + totalDays + '</b> 天有日程，合计 <b>' + totalEvents + '</b> 个会议' + (res.saved_days ? '，已自动填充 <b>' + res.saved_days + '</b> 天' : '');
 
         // 渲染结果列表
         var html = '';