feat: add parentAgentId to client types and session store

Add parentAgentId field to:
- Agent interface in session-store.ts
- AgentDirectoryEntry in agent-directory.ts
- getAgentDirectory() includes parentAgentId
- normalizeAgentSnapshot() maps from server payload

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

packages/app/src/contexts/session-context.tsx

@@ -139,6 +139,7 @@ function normalizeAgentSnapshot(snapshot: AgentSnapshotPayload, serverId: string
     requiresAttention: snapshot.requiresAttention ?? false,
     attentionReason: snapshot.attentionReason ?? null,
     attentionTimestamp,
+    parentAgentId: snapshot.parentAgentId,
   };
 }
 

packages/app/src/stores/session-store.ts

@@ -106,6 +106,7 @@ export interface Agent {
   requiresAttention?: boolean;
   attentionReason?: "finished" | "error" | "permission" | null;
   attentionTimestamp?: Date | null;
+  parentAgentId?: string;
 }
 
 export interface Command {
@@ -831,6 +832,7 @@ export const useSessionStore = create<SessionStore>()(
           requiresAttention: agent.requiresAttention ?? false,
           attentionReason: agent.attentionReason ?? null,
           attentionTimestamp: agent.attentionTimestamp ?? null,
+          parentAgentId: agent.parentAgentId,
         });
       }
       return entries;

packages/app/src/types/agent-directory.ts

@@ -12,4 +12,5 @@ export interface AgentDirectoryEntry {
   requiresAttention?: boolean;
   attentionReason?: "finished" | "error" | "permission" | null;
   attentionTimestamp?: Date | null;
+  parentAgentId?: string;
 }