refactor: dedupe ui provider lowercase helpers

extensions/irc/src/client.ts

@@ -1,5 +1,6 @@
 import net from "node:net";
 import tls from "node:tls";
+import { normalizeLowercaseStringOrEmpty } from "openclaw/plugin-sdk/text-runtime";
 import {
   parseIrcLine,
   parseIrcPrefix,
@@ -93,6 +94,10 @@ function buildFallbackNick(nick: string): string {
   return `${base}${suffix}`;
 }
 
+function normalizeIrcNick(value: string): string {
+  return normalizeLowercaseStringOrEmpty(value);
+}
+
 export function buildIrcNickServCommands(options?: IrcNickServOptions): string[] {
   if (!options || options.enabled === false) {
     return [];
@@ -187,7 +192,7 @@ export async function connectIrcClient(options: IrcClientOptions): Promise<IrcCl
     if (!fallbackNickAttempted) {
       fallbackNickAttempted = true;
       const fallbackNick = buildFallbackNick(desiredNick);
-      if (fallbackNick.toLowerCase() !== currentNick.toLowerCase()) {
+      if (normalizeIrcNick(fallbackNick) !== normalizeIrcNick(currentNick)) {
         try {
           sendRaw(`NICK ${fallbackNick}`);
           currentNick = fallbackNick;
@@ -288,7 +293,7 @@ export async function connectIrcClient(options: IrcClientOptions): Promise<IrcCl
 
       if (line.command === "NICK") {
         const prefix = parseIrcPrefix(line.prefix);
-        if (prefix.nick && prefix.nick.toLowerCase() === currentNick.toLowerCase()) {
+        if (prefix.nick && normalizeIrcNick(prefix.nick) === normalizeIrcNick(currentNick)) {
           const next =
             line.trailing != null
               ? line.trailing

extensions/irc/src/inbound.ts

@@ -1,4 +1,7 @@
-import { normalizeOptionalString } from "openclaw/plugin-sdk/text-runtime";
+import {
+  normalizeLowercaseStringOrEmpty,
+  normalizeOptionalString,
+} from "openclaw/plugin-sdk/text-runtime";
 import type { ResolvedIrcAccount } from "./accounts.js";
 import { normalizeIrcAllowlist, resolveIrcAllowlistMatch } from "./normalize.js";
 import {
@@ -209,7 +212,7 @@ export async function handleIrcInbound(params: {
       if (!dmAllowed) {
         if (dmPolicy === "pairing") {
           await pairing.issueChallenge({
-            senderId: senderDisplay.toLowerCase(),
+            senderId: normalizeLowercaseStringOrEmpty(senderDisplay),
             senderIdLine: `Your IRC id: ${senderDisplay}`,
             meta: { name: message.senderNick || undefined },
             sendPairingReply: async (text) => {

extensions/irc/src/monitor.ts

@@ -1,4 +1,5 @@
 import { resolveLoggerBackedRuntime } from "openclaw/plugin-sdk/extension-shared";
+import { normalizeLowercaseStringOrEmpty } from "openclaw/plugin-sdk/text-runtime";
 import { resolveIrcAccount } from "./accounts.js";
 import { connectIrcClient, type IrcClient } from "./client.js";
 import { buildIrcConnectOptions } from "./connect-options.js";
@@ -79,7 +80,10 @@ export async function monitorIrcProvider(opts: IrcMonitorOptions): Promise<{ sto
         if (!client) {
           return;
         }
-        if (event.senderNick.toLowerCase() === client.nick.toLowerCase()) {
+        if (
+          normalizeLowercaseStringOrEmpty(event.senderNick) ===
+          normalizeLowercaseStringOrEmpty(client.nick)
+        ) {
           return;
         }
 

extensions/irc/src/policy.ts

@@ -1,3 +1,4 @@
+import { normalizeLowercaseStringOrEmpty } from "openclaw/plugin-sdk/text-runtime";
 import { normalizeIrcAllowlist, resolveIrcAllowlistMatch } from "./normalize.js";
 import type { IrcAccountConfig, IrcChannelConfig } from "./types.js";
 import type { IrcInboundMessage } from "./types.js";
@@ -36,8 +37,10 @@ export function resolveIrcGroupMatch(params: {
     };
   }
 
-  const targetLower = params.target.toLowerCase();
-  const directKey = Object.keys(groups).find((key) => key.toLowerCase() === targetLower);
+  const targetLower = normalizeLowercaseStringOrEmpty(params.target);
+  const directKey = Object.keys(groups).find(
+    (key) => normalizeLowercaseStringOrEmpty(key) === targetLower,
+  );
   if (directKey) {
     const matched = groups[directKey];
     if (matched) {