重构物流客服模块并完善会话接待工作台

- 拆分应用工厂、业务服务与路由，保留原有 HTTP/SSE 和存储入口
- 分离页面资源，重排客服工作台并完善响应式导航、草稿和附件交互
- 整理维护脚本、请求示例和贡献指南，移除启动脚本中的密钥配置
- 上传文件改为仅本地保留，补充隔离的后端与前端回归验证

验证：46 项 Python 测试通过，含 14 个已有子测试；12 个 Node 前端场景通过。

scripts/close_active_sessions.py

@@ -0,0 +1,34 @@
+"""Close all active human sessions; waiting sessions and messages are preserved."""
+
+import argparse
+import sqlite3
+from contextlib import closing
+from pathlib import Path
+
+
+DEFAULT_DB = Path(__file__).resolve().parents[1] / "history.db"
+
+
+def close_active_sessions(db_path=None):
+    database = Path(db_path if db_path is not None else DEFAULT_DB).expanduser().resolve()
+    with closing(sqlite3.connect(database.as_uri() + "?mode=rw", uri=True)) as connection:
+        with connection:
+            count = connection.execute(
+                "UPDATE human_sessions SET status='closed' WHERE status='active'"
+            ).rowcount
+    return count
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--db", type=Path, default=DEFAULT_DB, help="Existing SQLite database")
+    args = parser.parse_args()
+    try:
+        count = close_active_sessions(args.db)
+    except sqlite3.Error as error:
+        parser.exit(1, f"Database error: {error}\n")
+    print(f"Closed {count} active session(s).")
+
+
+if __name__ == "__main__":
+    main()

scripts/inspect_human_sessions.py

@@ -0,0 +1,38 @@
+"""Inspect recent human messages and open sessions without changing the database."""
+
+import argparse
+import sqlite3
+from contextlib import closing
+from pathlib import Path
+
+
+DEFAULT_DB = Path(__file__).resolve().parents[1] / "history.db"
+
+
+def inspect_sessions(db_path=None):
+    database = Path(db_path if db_path is not None else DEFAULT_DB).expanduser().resolve()
+    with closing(sqlite3.connect(database.as_uri() + "?mode=ro", uri=True)) as connection:
+        messages = connection.execute(
+            "SELECT * FROM human_messages ORDER BY id DESC LIMIT 5"
+        ).fetchall()
+        sessions = connection.execute(
+            "SELECT id, status FROM human_sessions WHERE status!='closed' ORDER BY id"
+        ).fetchall()
+    return messages, sessions
+
+
+def main():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument("--db", type=Path, default=DEFAULT_DB, help="Existing SQLite database")
+    args = parser.parse_args()
+    try:
+        messages, sessions = inspect_sessions(args.db)
+    except sqlite3.Error as error:
+        parser.exit(1, f"Database error: {error}\n")
+    print(messages)
+    print("---")
+    print(sessions)
+
+
+if __name__ == "__main__":
+    main()