fix: clarify freecad auto routing report

src/Mod/FreeCADExchange/AutoRouting.py

@@ -1155,6 +1155,9 @@ def format_route_all_report(report):
             prepared_layout.get("surface_carriers", 0),
             prepared_layout.get("terminal_access_carriers", 0),
         )
+    errors = report.get("errors", []) or []
+    if errors:
+        message += "\n首个错误：{0}".format(str(errors[0]))
     auto_bound = report.get("auto_bound_terminals", 0)
     auto_created = report.get("auto_created_terminals", 0)
     if auto_bound or auto_created:

tests/python/freecad_exchange_auto_routing_test.py

@@ -989,6 +989,35 @@ class AutoRoutingTest(unittest.TestCase):
         self.assertIn("端子匹配失败", message)
         self.assertIn("local:", message)
 
+    def test_route_all_report_includes_network_and_first_error(self):
+        _install_fake_freecad()
+        _terminal_objects, _wiring_objects, _routing_network, auto_routing = _reload_modules()
+        report = {
+            "total_wires": 2,
+            "routed": 1,
+            "collision_warnings": 1,
+            "skipped_missing_terminal": 1,
+            "prepared_layout": {
+                "wire_duct_carriers": 2,
+                "surface_carriers": 4,
+                "terminal_access_carriers": 6,
+            },
+            "missing_endpoint_samples": [
+                {
+                    "start_terminal_uuid": "terminal-a",
+                    "end_terminal_uuid": "terminal-b",
+                }
+            ],
+            "errors": ["没有可用的线槽/路由路径网络"],
+        }
+
+        message = auto_routing.format_route_all_report(report)
+
+        self.assertIn("routed=1", message)
+        self.assertIn("线槽路径 2 条", message)
+        self.assertIn("首个错误：没有可用的线槽/路由路径网络", message)
+        self.assertIn("缺失示例：terminal-a -> terminal-b", message)
+
     def test_bind_wire_task_terminals_from_payload_does_not_create_wires(self):
         _install_fake_freecad()
         terminal_objects, wiring_objects, _routing_network, auto_routing = _reload_modules()