fix(showcase/aimock): reorder gen-ui-interrupt d6 fixture legs fleet-wide (toolName before toolCallId)

Audit follow-up to CopilotKit#5232, which fixed the gen-ui-interrupt d6 fixture
leg mis-order for langgraph-python + langgraph-typescript. aimock's
matchFixture is first-match-wins in array order and the loader dedups
on userMessage, so a toolCallId resume-leg placed BEFORE its
toolName:schedule_meeting first-leg shadows the tool-emitting leg on
turn-2 — the interrupt never fires and time-picker-card never mounts.

Fleet audit of every showcase/aimock/d6/*/gen-ui-interrupt.json found
ag2 as the only remaining mis-ordered fixture (both toolCallId
resume-legs preceded their toolName first-legs). Reorder ag2 so each
pill's toolName first-leg precedes its toolCallId resume-leg, matching
the proven-correct mastra/pydantic-ai/langgraph pattern. Reorder only;
response payloads and match keys are unchanged.

All other gen-ui-interrupt-supporting integrations (built-in-agent,
claude-sdk-*, langgraph-fastapi, langroid, ms-agent-dotnet/python,
pydantic-ai, spring-ai, strands) were already correctly ordered.

Author: jpr5

showcase/aimock/d6/ag2/gen-ui-interrupt.json

@@ -6,29 +6,7 @@
   },
   "fixtures": [
     {
-      "_comment": "gen-ui-interrupt sales-call pill — second leg: confirmation after user picks a slot and resolve fires. Keyed by toolCallId so it only matches when the prior tool result is being fed back. Placed BEFORE first-leg so toolCallId matching takes precedence over toolName matching.",
-      "match": {
-        "userMessage": "intro call with the sales team",
-        "toolCallId": "call_d5_schedule_sales_001",
-        "context": "ag2"
-      },
-      "response": {
-        "content": "Booked: Sales intro call confirmed for the slot you picked."
-      }
-    },
-    {
-      "_comment": "gen-ui-interrupt alice-1on1 pill — second leg: confirmation after user picks a slot. Placed BEFORE first-leg so toolCallId matching takes precedence.",
-      "match": {
-        "userMessage": "1:1 with Alice",
-        "toolCallId": "call_d5_schedule_alice_001",
-        "context": "ag2"
-      },
-      "response": {
-        "content": "Scheduled: 1:1 with Alice locked in for the slot you picked."
-      }
-    },
-    {
-      "_comment": "gen-ui-interrupt sales-call pill — first leg: schedule_meeting tool call triggers Python agent's interrupt(...). The toolName gate ensures this matches only when schedule_meeting is in the tool list (the agent must declare it).",
+      "_comment": "gen-ui-interrupt sales-call pill — first leg: schedule_meeting tool call triggers Python agent's interrupt(...). The toolName gate ensures this matches only when schedule_meeting is in the tool list (the agent must declare it). Placed BEFORE the toolCallId resume-leg so the duplicate-userMessage dedup does not shadow the tool-emitting leg — mirrors the passing mastra/pydantic-ai ordering.",
       "match": {
         "userMessage": "intro call with the sales team",
         "toolName": "schedule_meeting",
@@ -53,7 +31,18 @@
       }
     },
     {
-      "_comment": "gen-ui-interrupt alice-1on1 pill — first leg: schedule_meeting tool call.",
+      "_comment": "gen-ui-interrupt sales-call pill — second leg: confirmation after user picks a slot and resolve fires. Keyed by toolCallId so it only matches when the prior tool result is being fed back (last message is the tool result for this call).",
+      "match": {
+        "userMessage": "intro call with the sales team",
+        "toolCallId": "call_d5_schedule_sales_001",
+        "context": "ag2"
+      },
+      "response": {
+        "content": "Booked: Sales intro call confirmed for the slot you picked."
+      }
+    },
+    {
+      "_comment": "gen-ui-interrupt alice-1on1 pill — first leg: schedule_meeting tool call. Placed BEFORE the toolCallId resume-leg so the tool-emitting leg is not shadowed.",
       "match": {
         "userMessage": "1:1 with Alice",
         "toolName": "schedule_meeting",
@@ -76,6 +65,17 @@
           }
         ]
       }
+    },
+    {
+      "_comment": "gen-ui-interrupt alice-1on1 pill — second leg: confirmation after user picks a slot. Keyed by toolCallId so it only matches when the prior tool result is being fed back.",
+      "match": {
+        "userMessage": "1:1 with Alice",
+        "toolCallId": "call_d5_schedule_alice_001",
+        "context": "ag2"
+      },
+      "response": {
+        "content": "Scheduled: 1:1 with Alice locked in for the slot you picked."
+      }
     }
   ]
 }