🤖 codex: fix block reply ordering (#503)

What: serialize block reply sends, make typing non-blocking, add timeout fallback + abort-aware routing, and add regression tests.
Why: prevent out-of-order streamed blocks while keeping final fallback on timeouts.
Tests: ./node_modules/.bin/vitest run src/auto-reply/reply.block-streaming.test.ts src/auto-reply/reply/route-reply.test.ts
Tests: corepack pnpm lint && corepack pnpm build (pass). corepack pnpm test (ran locally; failure observed during run).

Co-authored-by: Josh Palmer <joshp123@users.noreply.github.com>

src/auto-reply/types.ts

@@ -1,14 +1,24 @@
 import type { TypingController } from "./reply/typing.js";
 
+export type BlockReplyContext = {
+  abortSignal?: AbortSignal;
+  timeoutMs?: number;
+};
+
 export type GetReplyOptions = {
   onReplyStart?: () => Promise<void> | void;
   onTypingController?: (typing: TypingController) => void;
   isHeartbeat?: boolean;
   onPartialReply?: (payload: ReplyPayload) => Promise<void> | void;
   onReasoningStream?: (payload: ReplyPayload) => Promise<void> | void;
-  onBlockReply?: (payload: ReplyPayload) => Promise<void> | void;
+  onBlockReply?: (
+    payload: ReplyPayload,
+    context?: BlockReplyContext,
+  ) => Promise<void> | void;
   onToolResult?: (payload: ReplyPayload) => Promise<void> | void;
   disableBlockStreaming?: boolean;
+  /** Timeout for block reply delivery (ms). */
+  blockReplyTimeoutMs?: number;
   /** If provided, only load these skills for this session (empty = no skills). */
   skillFilter?: string[];
 };