refactor: consolidate duplicate utility functions (#12439)

* refactor: consolidate duplicate utility functions

- Add escapeRegExp to src/utils.ts and remove 10 local duplicates
- Rename bash-tools clampNumber to clampWithDefault (different signature)
- Centralize formatError calls to use formatErrorMessage from infra/errors.ts
- Re-export formatErrorMessage from cli/cli-utils.ts to preserve API

* refactor: consolidate remaining escapeRegExp duplicates

* refactor: consolidate sleep, stripAnsi, and clamp duplicates

src/auto-reply/reply/directives.ts

@@ -1,4 +1,5 @@
 import type { NoticeLevel, ReasoningLevel } from "../thinking.js";
+import { escapeRegExp } from "../../utils.js";
 import {
   type ElevatedLevel,
   normalizeElevatedLevel,
@@ -17,8 +18,6 @@ type ExtractedLevel<T> = {
   hasDirective: boolean;
 };
 
-const escapeRegExp = (value: string) => value.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
-
 const matchLevelDirective = (
   body: string,
   names: string[],

src/auto-reply/reply/inbound-sender-meta.ts

@@ -1,6 +1,7 @@
 import type { MsgContext } from "../templating.js";
 import { normalizeChatType } from "../../channels/chat-type.js";
 import { listSenderLabelCandidates, resolveSenderLabel } from "../../channels/sender-label.js";
+import { escapeRegExp } from "../../utils.js";
 
 export function formatInboundBodyWithSenderMeta(params: { body: string; ctx: MsgContext }): string {
   const body = params.body;
@@ -51,7 +52,3 @@ function hasSenderMetaLine(body: string, ctx: MsgContext): boolean {
     return pattern.test(body);
   });
 }
-
-function escapeRegExp(value: string): string {
-  return value.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
-}

src/auto-reply/reply/mentions.ts

@@ -3,10 +3,7 @@ import type { MsgContext } from "../templating.js";
 import { resolveAgentConfig } from "../../agents/agent-scope.js";
 import { getChannelDock } from "../../channels/dock.js";
 import { normalizeChannelId } from "../../channels/plugins/index.js";
-
-function escapeRegExp(text: string): string {
-  return text.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
-}
+import { escapeRegExp } from "../../utils.js";
 
 function deriveMentionPatterns(identity?: { name?: string; emoji?: string }) {
   const patterns: string[] = [];