refactor: trim subagent type exports

src/agents/subagent-announce-output.ts

@@ -50,7 +50,7 @@ type SubagentOutputSnapshot = {
   waitingForContinuation?: boolean;
 };
 
-export type AgentWaitResult = {
+type AgentWaitResult = {
   status?: string;
   startedAt?: number;
   endedAt?: number;

src/agents/subagent-announce-queue.ts

@@ -32,7 +32,7 @@ export type AnnounceQueueItem = {
   sourceTool?: string;
 };
 
-export type AnnounceQueueSettings = {
+type AnnounceQueueSettings = {
   mode: QueueMode;
   debounceMs?: number;
   cap?: number;

src/agents/tool-catalog.ts

@@ -17,7 +17,7 @@ type ToolProfilePolicy = {
   deny?: string[];
 };
 
-export type CoreToolSection = {
+type CoreToolSection = {
   id: string;
   label: string;
   tools: Array<{