sync update from LAN repo (source dhk-1 @ 3b1ec5b4)

offline-backend-20260512/backend/packages/harness/deerflow/html_runtime/map_engine.py

@@ -0,0 +1,24 @@
+"""Selected map engine for newly generated HTML pages."""
+
+from __future__ import annotations
+
+import logging
+from typing import Literal
+
+logger = logging.getLogger(__name__)
+
+HtmlMapEngine = Literal["echarts", "leaflet"]
+
+
+def html_map_engine() -> HtmlMapEngine:
+    """Return the admin-selected HTML map engine, defaulting to ECharts."""
+    try:
+        from deerflow.config.system_settings import load_system_settings
+
+        engine = load_system_settings().html_map.engine
+    except Exception:
+        logger.debug("Failed to read the HTML map engine; using ECharts", exc_info=True)
+        return "echarts"
+    if engine == "leaflet":
+        return "leaflet"
+    return "echarts"