refactor(auto-reply): hide delivery helper types

src/auto-reply/reply/block-reply-coalescer.ts

@@ -5,7 +5,7 @@ import type { ReplyPayload } from "../types.js";
 import type { BlockStreamingCoalescing } from "./block-streaming.js";
 
 /** Coalesces many streaming reply fragments into fewer outbound payloads. */
-export type BlockReplyCoalescer = {
+type BlockReplyCoalescer = {
   enqueue: (payload: ReplyPayload) => void;
   flush: (options?: { force?: boolean }) => Promise<void>;
   hasBuffered: () => boolean;

src/auto-reply/reply/block-reply-pipeline.ts

@@ -23,7 +23,7 @@ export type BlockReplyPipeline = {
 };
 
 /** Optional buffering strategy used before payloads enter block delivery. */
-export type BlockReplyBuffer = {
+type BlockReplyBuffer = {
   shouldBuffer: (payload: ReplyPayload) => boolean;
   onEnqueue?: (payload: ReplyPayload) => void;
   finalize?: (payload: ReplyPayload) => ReplyPayload;

src/auto-reply/reply/block-streaming.ts

@@ -82,7 +82,7 @@ export type BlockStreamingCoalescing = {
   flushOnEnqueue?: boolean;
 };
 
-export type BlockStreamingChunking = {
+type BlockStreamingChunking = {
   minChars: number;
   maxChars: number;
   breakPreference: "paragraph" | "newline" | "sentence";

src/auto-reply/reply/completion-delivery-policy.ts

@@ -5,9 +5,9 @@ import { deriveSessionChatTypeFromKey } from "../../sessions/session-chat-type-s
 import type { DeliveryContext } from "../../utils/delivery-context.types.js";
 import { resolveSourceReplyDeliveryMode } from "./source-reply-delivery-mode.js";
 
-export type CompletionChatType = ChatType | "unknown";
+type CompletionChatType = ChatType | "unknown";
 
-export type CompletionDeliverySessionEntry = {
+type CompletionDeliverySessionEntry = {
   chatType?: string | null;
   origin?: { chatType?: string | null } | null;
 };