fix(ui): sync_events 查询补 JOIN sync_videos 取 camera_name(修 1054 报错)；feat(缩略图): Oracle 处理成功后抽首帧存 thumbs/{id}.jpg + /api/oracle/video/{id}/thumb 带 token 接口；fam-ui 视频会话显示缩略图(oracle_url+token)；start_ui.sh 注入 .env

fam-edge/src/fam_edge/api_gateway/api_gateway.py

@@ -12,7 +12,7 @@ API-Gateway - Flask 蓝图（新架构 v2）
 """
 import os
 
-from flask import Blueprint, request, jsonify
+from flask import Blueprint, request, jsonify, send_file
 
 from ..logger import setup_logger
 from .. import state
@@ -116,6 +116,20 @@ def chat_ask():
     return jsonify({"answer": answer, "provider": provider}), 200
 
 
+@api_bp.route('/api/oracle/video/<int:video_id>/thumb', methods=['GET'])
+def video_thumb(video_id):
+    """返回视频首帧缩略图（token 校验，不公网裸奔）。
+
+    缩略图由 video_processor 处理成功后生成于 /opt/fam-edge/thumbs/{video_id}.jpg。
+    """
+    if not _check_token():
+        return jsonify({"error": "unauthorized"}), 401
+    path = f"/opt/fam-edge/thumbs/{video_id}.jpg"
+    if not os.path.isfile(path):
+        return jsonify({"error": "thumb_not_found"}), 404
+    return send_file(path, mimetype='image/jpeg')
+
+
 @api_bp.route('/health', methods=['GET'])
 def health():
     """健康检查"""