Tool Call Semantics Alignment

Nucleic-Session: B5E370C3-4764-47E1-95D3-A36B4AAB8AC6

NucleicRemote/NucleicRemote/Views/TranscriptRow.swift

@@ -15,9 +15,21 @@ struct TranscriptRow: View {
         case .thinking(let text):
             ThinkingRow(text: text)
         case .tool(let group):
-            ToolGroupRow(group: group)
+            // A lone subagent spawn reads as its own gold subagent card (type, task, status, and
-        case .orchestration(let group):
+            // its nested activity on expand); every other tool is a plain collapsible card.
-            OrchestrationCard(group: group)
+            if group.isOrchestration {
+                SubagentCard(group: group)
+            } else {
+                ToolCallCard(group: group)
+            }
+        case .toolBlock(let groups):
+            // A run made entirely of subagent spawns is a multi-agent fan-out — the gold
+            // orchestration card; any other run is one contiguous tool block.
+            if groups.allSatisfy(\.isOrchestration) {
+                OrchestrationCard(groups: groups)
+            } else {
+                ToolBlockCard(groups: groups)
+            }
         case .sessionStarted(let model, let cwd):
             InfoLine(icon: "play.circle", text: "Session started · \(modelLabel(model))", detail: cwd)
         case .usage(let usage):