fix: 改进人数解析逻辑，从多种格式提取人数

web/app.py

@@ -199,13 +199,14 @@ async def rename_person(person_id: str, name: str):
 async def get_daily_stats(date: str = None):
     """获取每日统计数据"""
     from datetime import datetime, timedelta
+    import re
     
     # 默认昨天的数据
     if date is None:
         yesterday = datetime.now() - timedelta(days=1)
         date = yesterday.strftime('%Y-%m-%d')
     
-    conn = db._get_conn()
+    conn = sqlite3.connect(db.db_path)
     conn.row_factory = sqlite3.Row
     
     # 获取当天所有图片
@@ -219,22 +220,65 @@ async def get_daily_stats(date: str = None):
     timeline = []
     for img in images:
         # 获取该图片的事件
-        events = db.get_events_by_image(img['id'])
+        cursor = conn.execute(
+            "SELECT event_type, description FROM events WHERE image_id = ?",
+            (img['id'],)
+        )
+        events = cursor.fetchall()
         
-        # 计算人数
+        # 计算人数 - 从事件描述中提取
         person_count = 0
+        
+        # 方法1: 从"共 X 人"格式提取
         for event in events:
-            if '人物活动' in event['event_type'] or '人员进出' in event['event_type']:
-                # 从描述中提取人数
+            desc = event['description']
+            if '共 ' in desc and ' 人' in desc:
+                try:
+                    count_str = desc.split('共 ')[1].split(' 人')[0]
+                    person_count = int(count_str)
+                    break
+                except:
+                    pass
+        
+        # 方法2: 从"当前 X 人"格式提取
+        if person_count == 0:
+            for event in events:
                 desc = event['description']
-                if '共 ' in desc and ' 人' in desc:
+                if '当前 ' in desc and ' 人' in desc:
                     try:
-                        count_str = desc.split('共 ')[1].split(' 人')[0]
+                        count_str = desc.split('当前 ')[1].split(' 人')[0]
                         person_count = int(count_str)
+                        break
                     except:
-                        person_count = 1
-                elif '#1' in desc or '#2' in desc or '#3' in desc:
-                    person_count = max(person_count, 1)
+                        pass
+        
+        # 方法3: 从"当前剩 X 人"格式提取
+        if person_count == 0:
+            for event in events:
+                desc = event['description']
+                if '当前剩 ' in desc and ' 人' in desc:
+                    try:
+                        count_str = desc.split('当前剩 ')[1].split(' 人')[0]
+                        person_count = int(count_str)
+                        break
+                    except:
+                        pass
+        
+        # 方法4: 从人物活动事件推断
+        if person_count == 0:
+            person_events = [e for e in events if '人物活动' in e['event_type'] or '人员进出' in e['event_type']]
+            if person_events:
+                # 统计 #1, #2, #3 等序号
+                max_index = 0
+                for e in person_events:
+                    desc = e['description']
+                    # 提取所有 #数字 格式
+                    import re
+                    matches = re.findall(r'#(\d+)', desc)
+                    if matches:
+                        max_index = max(max_index, max([int(m) for m in matches]))
+                if max_index > 0:
+                    person_count = max_index
         
         timeline.append({
             'time': img['timestamp'],
@@ -245,10 +289,12 @@ async def get_daily_stats(date: str = None):
     
     # 统计汇总
     total_images = len(images)
-    total_events = conn.execute(
+    
+    cursor = conn.execute(
         "SELECT COUNT(*) FROM events WHERE image_id IN (SELECT id FROM images WHERE date_folder = ?)",
         (date,)
-    ).fetchone()[0]
+    )
+    total_events = cursor.fetchone()[0]
     
     # 事件类型统计
     cursor = conn.execute(