test(topology): require database-driven visual semantics

Co-Authored-By: Claude <noreply@anthropic.com>

tests/test_guanghan_topology_demo.py

@@ -40,6 +40,36 @@ class GuanghanTopologySourceTests(unittest.TestCase):
         self.assertIn("const API_BASE = ''", self.html)
         self.assertNotIn("http://localhost:5000", self.html)
 
+    def test_page_uses_database_presentation_payload(self) -> None:
+        self.assertIn("currentData.layout.presentation", self.html)
+        self.assertIn("nodeStyles", self.html)
+        self.assertIn("edgeStyles", self.html)
+        self.assertIn("decorationStyles", self.html)
+        self.assertIn("legendItems", self.html)
+
+    def test_business_visual_semantics_are_not_css_hardcoded(self) -> None:
+        forbidden = [
+            ".connection.structural",
+            ".connection.pressurized",
+            ".connection.utility",
+            ".node-card { fill:",
+            ".core-card { fill:",
+            ".power-card { fill:",
+            ".power-node-card { fill:",
+            ".vehicle-card { fill:",
+            "function connectionClass",
+        ]
+        for token in forbidden:
+            self.assertNotIn(token, self.html)
+
+    def test_legend_is_rendered_from_presentation_payload(self) -> None:
+        self.assertIn('id="legend"', self.html)
+        self.assertNotIn("结构直连</span>", self.html)
+        self.assertNotIn("加压走道</span>", self.html)
+        self.assertNotIn("燃料 / 供电</span>", self.html)
+        self.assertNotIn("大型折叠散热面板</span>", self.html)
+        self.assertIn("renderLegend", self.html)
+
     def test_controls_use_api_navigation_and_safe_text(self) -> None:
         self.assertIn("/api/v1/bases/guanghan/missions", self.html)
         self.assertNotIn("return ['BL-01'", self.html)