feat(人物管理/红框标记): 关键帧人脸标记 + 人物命名重命名回溯 + 人物管理页改版

1. fam-edge 新增 frame_marker.py: Edge 端人脸检测画红框+统计人脸数（NAS ARM 太弱只存图零计算），orchestrator 分析后回传前标记，新增 /api/edge/mark_frames 批量补标端点
2. fam-core 新增 tools/backfill_mark_frames.py: 存量关键帧批量补红框（幂等+备份 frames_orig）
3. db_layer.name_member 增强: 支持自动注册新标签/重命名回溯（旧真名一并替换）/多人组合字符串 REPLACE
4. fam-ui 成员命名页改为人物管理页: 所有人物照片墙+命名重命名+统计去重
5. event_receiver/member_manager 配套适配

fam-core/src/fam_core/db_layer.py

@@ -424,19 +424,31 @@ def get_all_members(include_named=True, include_unnamed=True) -> List[Dict]:
 
 
 def name_member(abstract_label: str, real_name: str, named_by: str) -> Dict:
-    """命名成员 + 批量回溯更新历史记录"""
+    """命名/重命名成员 + 批量回溯更新历史记录
+
+    - 标签未入库（如 AI 新输出的 人物1）自动注册
+    - 已命名成员可重命名（旧真名一并回溯替换）
+    - person 为多人组合字符串（'张三, 汤圆'），用 REPLACE 替换其中目标
+    """
     conn = get_conn()
     try:
         cursor = conn.cursor()
 
-        # 1. 校验存在且未命名
+        # 1. 查现有记录，拿到旧真名
         cursor.execute(
-            "SELECT member_id FROM family_members WHERE abstract_label = %s AND real_name IS NULL",
+            "SELECT member_id, real_name FROM family_members WHERE abstract_label = %s",
             (abstract_label,)
         )
         row = cursor.fetchone()
-        if not row:
-            return {"error": f"成员 {abstract_label} 不存在或已命名"}
+        old_name = None
+        if row:
+            old_name = row[1]
+        else:
+            cursor.execute(
+                """INSERT INTO family_members (abstract_label, feature_description, first_seen_at)
+                   VALUES (%s, %s, NOW())""",
+                (abstract_label, f'由命名操作自动注册: {real_name}')
+            )
 
         # 2. 更新 family_members
         cursor.execute(
@@ -447,45 +459,62 @@ def name_member(abstract_label: str, real_name: str, named_by: str) -> Dict:
         )
 
         # 3. 批量回溯更新 event_details
-        cursor.execute(
-            "UPDATE event_details SET person = %s WHERE person = %s",
-            (real_name, abstract_label)
-        )
-        updated_details_count = cursor.rowcount
+        #    目标出现的三种形态: 独占整字段 / 多人组合内 / AI 直呼旧真名
+        updated_details_count = 0
+        for old in {abstract_label, old_name} - {None}:
+            if old == real_name:
+                continue
+            cursor.execute(
+                "UPDATE event_details SET person = %s WHERE person = %s",
+                (real_name, old)
+            )
+            updated_details_count += cursor.rowcount
+            cursor.execute(
+                """UPDATE event_details
+                   SET person = REPLACE(person, %s, %s)
+                   WHERE person LIKE %s AND person <> %s""",
+                (old, real_name, f'%{old}%', real_name)
+            )
+            updated_details_count += cursor.rowcount
 
         # 4. 批量回溯更新 monitor_events.entities_json
         #    MariaDB 10.11 不支持 MySQL 的 $[*] 通配符 JSON 路径，
         #    改用 Python 层解析 + 逐行更新
-        cursor.execute(
-            "SELECT event_id, entities_json FROM monitor_events WHERE entities_json LIKE %s",
-            (f'%{abstract_label}%',)
-        )
         import json as _json
         updated_events_count = 0
-        for eid, entities_raw in cursor.fetchall():
-            if not entities_raw:
-                continue
-            try:
-                entities = _json.loads(entities_raw) if isinstance(entities_raw, str) else entities_raw
-            except (ValueError, TypeError):
-                continue
-            changed = False
-            if isinstance(entities, list):
-                for ent in entities:
-                    if isinstance(ent, dict) and ent.get('person') == abstract_label:
-                        ent['person'] = real_name
-                        changed = True
-            if changed:
-                cursor.execute(
-                    "UPDATE monitor_events SET entities_json = %s WHERE event_id = %s",
-                    (_json.dumps(entities, ensure_ascii=False), eid)
-                )
-                updated_events_count += 1
+        targets = {abstract_label, old_name} - {None}
+        if targets and targets != {real_name}:
+            like_conds = ' OR '.join(['entities_json LIKE %s'] * len(targets))
+            like_args = [f'%{t}%' for t in targets]
+            cursor.execute(
+                f"SELECT event_id, entities_json FROM monitor_events WHERE {like_conds}",
+                tuple(like_args)
+            )
+            for eid, entities_raw in cursor.fetchall():
+                if not entities_raw:
+                    continue
+                try:
+                    entities = _json.loads(entities_raw) if isinstance(entities_raw, str) else entities_raw
+                except (ValueError, TypeError):
+                    continue
+                changed = False
+                if isinstance(entities, list):
+                    for ent in entities:
+                        if isinstance(ent, dict) and ent.get('person') in targets:
+                            ent['person'] = real_name
+                            changed = True
+                if changed:
+                    cursor.execute(
+                        "UPDATE monitor_events SET entities_json = %s WHERE event_id = %s",
+                        (_json.dumps(entities, ensure_ascii=False), eid)
+                    )
+                    updated_events_count += 1
 
         conn.commit()
         return {
             "abstract_label": abstract_label,
             "real_name": real_name,
+            "renamed_from": old_name,
             "updated_event_details_count": updated_details_count,
             "updated_monitor_events_count": updated_events_count
         }
@@ -496,6 +525,109 @@ def name_member(abstract_label: str, real_name: str, named_by: str) -> Dict:
         conn.close()
 
 
+def merge_member(source_key: str, target_key: str, named_by: str = '管理员') -> Dict:
+    """合并人物: source 并入 target（用户判断两帧是同一人时）
+
+    source_key/target_key 可为 abstract_label 或 real_name。
+    - event_details.person: 独占/组合字符串内的 source 一律替换为 target 显示名
+    - monitor_events.entities_json: person 字段替换
+    - family_members: source 行置 is_active=0（保留历史），target 未入库则注册
+    """
+    if source_key == target_key:
+        return {"error": "source 与 target 不能相同"}
+
+    conn = get_conn()
+    try:
+        cursor = conn.cursor(pymysql.cursors.DictCursor)
+
+        def resolve(key):
+            cursor.execute(
+                """SELECT member_id, abstract_label, real_name FROM family_members
+                   WHERE is_active = TRUE AND (abstract_label = %s OR real_name = %s)
+                   ORDER BY real_name IS NULL LIMIT 1""",
+                (key, key))
+            return cursor.fetchone()
+
+        src = resolve(source_key)
+        tgt = resolve(target_key)
+        if not src:
+            return {"error": f"人物 {source_key} 不存在"}
+        if not tgt:
+            # target 是未入库的裸标签（如 人物1），注册后作为目标
+            cursor.execute(
+                """INSERT INTO family_members (abstract_label, feature_description, first_seen_at)
+                   VALUES (%s, %s, NOW())""",
+                (target_key, f'合并操作自动注册: {source_key} 并入'))
+            tgt = {'abstract_label': target_key, 'real_name': None}
+
+        target_display = tgt['real_name'] or tgt['abstract_label']
+        # source 的所有称呼: 抽象标签 + 旧真名（多人组合里两种都可能出现）
+        source_names = {src['abstract_label']}
+        if src['real_name']:
+            source_names.add(src['real_name'])
+
+        updated_details = 0
+        for name in source_names:
+            if name == target_display:
+                continue
+            cursor.execute(
+                "UPDATE event_details SET person = %s WHERE person = %s",
+                (target_display, name))
+            updated_details += cursor.rowcount
+            cursor.execute(
+                """UPDATE event_details
+                   SET person = REPLACE(person, %s, %s)
+                   WHERE person LIKE %s AND person <> %s""",
+                (name, target_display, f'%{name}%', target_display))
+            updated_details += cursor.rowcount
+
+        # entities_json 逐行替换
+        import json as _json
+        updated_events = 0
+        like_conds = ' OR '.join(['entities_json LIKE %s'] * len(source_names))
+        cursor.execute(
+            f"SELECT event_id, entities_json FROM monitor_events WHERE {like_conds}",
+            tuple(f'%{n}%' for n in source_names))
+        for row in cursor.fetchall():
+            raw = row['entities_json']
+            if not raw:
+                continue
+            try:
+                entities = _json.loads(raw) if isinstance(raw, str) else raw
+            except (ValueError, TypeError):
+                continue
+            changed = False
+            if isinstance(entities, list):
+                for ent in entities:
+                    if isinstance(ent, dict) and ent.get('person') in source_names:
+                        ent['person'] = target_display
+                        changed = True
+            if changed:
+                cursor.execute(
+                    "UPDATE monitor_events SET entities_json = %s WHERE event_id = %s",
+                    (_json.dumps(entities, ensure_ascii=False), row['event_id']))
+                updated_events += 1
+
+        # source 行停用
+        cursor.execute(
+            "UPDATE family_members SET is_active = 0, updated_at = NOW() WHERE member_id = %s",
+            (src['member_id'],))
+
+        conn.commit()
+        return {
+            "source": source_key,
+            "target": target_display,
+            "merged_names": sorted(source_names),
+            "updated_event_details_count": updated_details,
+            "updated_monitor_events_count": updated_events
+        }
+    except Exception as e:
+        conn.rollback()
+        raise e
+    finally:
+        conn.close()
+
+
 def get_known_members_context() -> str:
     """获取已命名+未命名成员清单，用于注入 VLM Prompt"""
     conn = get_conn()

fam-core/src/fam_core/event_receiver/event_receiver.py

@@ -38,10 +38,15 @@ def _is_abstract_label(person: str) -> bool:
 
 
 def _save_frame_images(event_id: int, frame_details: list) -> int:
-    """把 frame_details 中的 base64 关键帧落盘，返回成功张数"""
+    """把 frame_details 中的 base64 关键帧落盘，返回成功张数
+
+    同时写 meta.json（frame_index -> face_count），UI 据此挑选有人像的帧做头像。
+    """
     saved = 0
+    face_counts = {}
     for frame in frame_details:
         img_b64 = frame.pop('frame_image', None)
+        faces = frame.pop('face_count', None)
         if not img_b64:
             continue
         idx = frame.get('frame_index', 0)
@@ -51,9 +56,18 @@ def _save_frame_images(event_id: int, frame_details: list) -> int:
             out_path = os.path.join(out_dir, f'frame_{idx}.jpg')
             with open(out_path, 'wb') as f:
                 f.write(base64.b64decode(img_b64))
+            if faces is not None:
+                face_counts[str(idx)] = int(faces)
             saved += 1
         except Exception as e:
             logger.warning(f"[event_id={event_id}] 关键帧落盘失败 frame_{idx}: {e}")
+    if face_counts:
+        try:
+            import json as _json
+            with open(os.path.join(out_dir, 'meta.json'), 'w') as f:
+                _json.dump(face_counts, f)
+        except Exception as e:
+            logger.warning(f"[event_id={event_id}] meta.json 写入失败: {e}")
     if saved:
         logger.info(f"[event_id={event_id}] 关键帧落盘 {saved} 张 -> {FRAME_IMAGE_DIR}")
     return saved

fam-core/src/fam_core/member_manager/member_manager.py

@@ -57,6 +57,29 @@ def name_member():
         return jsonify({"error": str(e)}), 500
 
 
+@member_bp.route('/api/member/merge', methods=['POST'])
+def merge_member():
+    """合并人物（用户判断两个标签是同一人时，source 并入 target）"""
+    data = request.get_json(silent=True)
+    if not data:
+        return jsonify({"error": "Invalid JSON"}), 400
+
+    source_key = data.get('source')
+    target_key = data.get('target')
+    if not source_key or not target_key:
+        return jsonify({"error": "缺少必填字段: source, target"}), 400
+
+    logger.info(f"合并人物: {source_key} -> {target_key}")
+    try:
+        result = db_layer.merge_member(source_key, target_key)
+        if 'error' in result:
+            return jsonify(result), 404
+        return jsonify(result), 200
+    except Exception as e:
+        logger.error(f"合并失败: {e}", exc_info=True)
+        return jsonify({"error": str(e)}), 500
+
+
 @member_bp.route('/api/member/list', methods=['GET'])
 def list_members():
     """列出所有成员"""