Add unit defeat event reactions

data/scenarios/010_white_horse_relief.json

@@ -280,6 +280,20 @@
         }
       ]
     },
+    {
+      "id": "yan_liang_vanguard_defeated",
+      "once": true,
+      "when": { "type": "unit_defeated", "unit_ids": ["yan_liang_vanguard"] },
+      "actions": [
+        {
+          "type": "dialogue",
+          "lines": [
+            { "speaker": "Guo Jia", "text": "Yan Liang's banner is down. His riders will feel that before Yuan Shao can answer." },
+            { "speaker": "Cao Cao", "text": "Press the isolated vanguard and make White Horse breathe again." }
+          ]
+        }
+      ]
+    },
     {
       "id": "xu_province_reserve",
       "once": true,

data/scenarios/011_yan_ford_pursuit.json

@@ -283,6 +283,22 @@
         }
       ]
     },
+    {
+      "id": "wen_chou_vanguard_defeated",
+      "once": true,
+      "when": { "type": "unit_defeated", "unit_ids": ["wen_chou_vanguard"] },
+      "actions": [
+        { "type": "log", "text": "Wen Chou's countercharge collapses at Yan Ford." },
+        {
+          "type": "dialogue",
+          "lines": [
+            { "speaker": "Wen Chou", "text": "Yan Liang... I rode the same road too quickly." },
+            { "speaker": "Guo Jia", "text": "The ford has taken both wings from Yuan Shao." },
+            { "speaker": "Cao Cao", "text": "Then close the crossing. Guandu is where his numbers must answer us." }
+          ]
+        }
+      ]
+    },
     {
       "id": "white_horse_fortified",
       "once": true,