fix: bind knowledge maps to explicit regions

tests/test_plaza_graph_fallback.py

@@ -5,6 +5,7 @@ from app.api.plaza import (
     _graph_map_poi_items,
     _graph_poi_detail_payload,
     _graph_zone_payload,
+    _resolve_spatial_graph_name,
 )
 
 
@@ -48,6 +49,42 @@ class PlazaGraphFallbackTests(unittest.TestCase):
         self.assertEqual(items[1]["categories"], ["公交站"])
         self.assertEqual(items[0]["zone_id"], "A01")
 
+    def test_city_place_nodes_use_place_type_as_dynamic_business_category(self) -> None:
+        items = _graph_map_poi_items(
+            [[
+                None,
+                ["Place"],
+                {
+                    "element_id": "city:mall-1",
+                    "name": "测试商场",
+                    "place_type": "mall",
+                    "longitude": 106.63,
+                    "latitude": 26.65,
+                    "adcode": "520102",
+                },
+            ]]
+        )
+
+        self.assertEqual(items[0]["category"], "商场")
+        self.assertEqual(items[0]["categories"], ["商场"])
+        self.assertEqual(items[0]["lng"], 106.63)
+        self.assertEqual(items[0]["adcode"], "520102")
+
+    def test_coordinate_helper_nodes_are_not_rendered_as_business_pois(self) -> None:
+        items = _graph_map_poi_items(
+            [[
+                "cell-1",
+                ["GeoCell"],
+                {"name": "网格", "lng": 106.63, "lat": 26.65},
+            ]]
+        )
+
+        self.assertEqual(items, [])
+
+    def test_legacy_city_project_uses_its_explicit_spatial_companion(self) -> None:
+        self.assertEqual(_resolve_spatial_graph_name("guiyang_new2"), "guiyang_spatial_v1")
+        self.assertEqual(_resolve_spatial_graph_name("city_import_v3"), "city_import_v3")
+
     def test_graph_zones_decode_serialized_geometry(self) -> None:
         payload = _graph_zone_payload(
             [[{"towncode": "522722100000", "name": "玉屏街道"}, 12, 107.8, 25.3, 107.9, 25.5]],