refactor: dedupe locale lowercase helpers

extensions/browser/src/browser/cdp.ts

@@ -380,6 +380,7 @@ export async function snapshotDom(opts: {
   const expression = `(() => {
     const maxNodes = ${JSON.stringify(limit)};
     const maxText = ${JSON.stringify(maxTextChars)};
+    const lower = (value) => String(value || "").toLocaleLowerCase();
     const nodes = [];
     const root = document.documentElement;
     if (!root) return { nodes };
@@ -389,7 +390,7 @@ export async function snapshotDom(opts: {
       const el = cur.el;
       if (!el || el.nodeType !== 1) continue;
       const ref = "n" + String(nodes.length + 1);
-      const tag = (el.tagName || "").toLowerCase();
+      const tag = lower(el.tagName);
       const id = el.id ? String(el.id) : undefined;
       const className = el.className ? String(el.className).slice(0, 300) : undefined;
       const role = el.getAttribute && el.getAttribute("role") ? String(el.getAttribute("role")) : undefined;
@@ -510,9 +511,10 @@ export async function querySelector(opts: {
     const lim = ${JSON.stringify(limit)};
     const maxText = ${JSON.stringify(maxText)};
     const maxHtml = ${JSON.stringify(maxHtml)};
+    const lower = (value) => String(value || "").toLocaleLowerCase();
     const els = Array.from(document.querySelectorAll(sel)).slice(0, lim);
     return els.map((el, i) => {
-      const tag = (el.tagName || "").toLowerCase();
+      const tag = lower(el.tagName);
       const id = el.id ? String(el.id) : undefined;
       const className = el.className ? String(el.className).slice(0, 300) : undefined;
       let text = "";

extensions/memory-core/src/memory/qmd-manager.ts

@@ -42,7 +42,10 @@ import {
   type ResolvedQmdConfig,
   type ResolvedQmdMcporterConfig,
 } from "openclaw/plugin-sdk/memory-core-host-engine-storage";
-import { normalizeLowercaseStringOrEmpty } from "openclaw/plugin-sdk/text-runtime";
+import {
+  localeLowercasePreservingWhitespace,
+  normalizeLowercaseStringOrEmpty,
+} from "openclaw/plugin-sdk/text-runtime";
 import { asRecord } from "../dreaming-shared.js";
 import { resolveQmdCollectionPatternFlags, type QmdCollectionPatternFlag } from "./qmd-compat.js";
 
@@ -2206,17 +2209,15 @@ export class QmdMemoryManager implements MemorySearchManager {
     }
     const parsed = path.posix.parse(trimmed);
     const normalizePart = (value: string): string =>
-      value
-        .normalize("NFKD")
-        .toLocaleLowerCase()
+      localeLowercasePreservingWhitespace(value.normalize("NFKD"))
         .replace(/[^\p{Letter}\p{Number}]+/gu, "-")
         .replace(/-{2,}/g, "-")
         .replace(/^-+|-+$/g, "");
     const normalizedName = normalizePart(parsed.name);
-    const normalizedExt = parsed.ext
-      .normalize("NFKD")
-      .toLocaleLowerCase()
-      .replace(/[^\p{Letter}\p{Number}.]+/gu, "");
+    const normalizedExt = localeLowercasePreservingWhitespace(parsed.ext.normalize("NFKD")).replace(
+      /[^\p{Letter}\p{Number}.]+/gu,
+      "",
+    );
     const fallbackName = normalizeLowercaseStringOrEmpty(parsed.name.normalize("NFKD")).replace(
       /\s+/g,
       "-",

src/agents/pi-hooks/compaction-safeguard-quality.ts

@@ -1,4 +1,5 @@
 import { extractKeywords, isQueryStopWordToken } from "../../memory-host-sdk/query.js";
+import { localeLowercasePreservingWhitespace } from "../../shared/string-coerce.js";
 import type { CompactionSummarizationInstructions } from "../compaction.js";
 import { wrapUntrustedPromptDataBlock } from "../sanitize-for-prompt.js";
 
@@ -166,7 +167,7 @@ export function extractOpaqueIdentifiers(text: string): string[] {
 }
 
 function tokenizeAskOverlapText(text: string): string[] {
-  const normalized = text.toLocaleLowerCase().normalize("NFKC").trim();
+  const normalized = localeLowercasePreservingWhitespace(text.normalize("NFKC")).trim();
   if (!normalized) {
     return [];
   }

src/canvas-host/a2ui/index.html

@@ -8,7 +8,7 @@
       (() => {
         const normalizeLower = (value) => {
           const trimmed = String(value || "").trim();
-          return trimmed.toLowerCase();
+          return trimmed.toLocaleLowerCase();
         };
         try {
           const params = new URLSearchParams(window.location.search);

src/plugin-sdk/text-runtime.ts

@@ -29,6 +29,7 @@ export * from "../utils/reaction-level.js";
 export * from "../utils/with-timeout.js";
 export {
   hasNonEmptyString,
+  localeLowercasePreservingWhitespace,
   lowercasePreservingWhitespace,
   normalizeLowercaseStringOrEmpty,
   normalizeNullableString,

src/shared/string-coerce.ts

@@ -26,6 +26,10 @@ export function lowercasePreservingWhitespace(value: string): string {
   return value.toLowerCase();
 }
 
+export function localeLowercasePreservingWhitespace(value: string): string {
+  return value.toLocaleLowerCase();
+}
+
 export function resolvePrimaryStringValue(value: unknown): string | undefined {
   if (typeof value === "string") {
     return normalizeOptionalString(value);