refactor: share trimmed string entry normalization

src/shared/string-normalization.test.ts

@@ -9,6 +9,11 @@ import {
 describe("shared/string-normalization", () => {
   it("normalizes mixed allow-list entries", () => {
     expect(normalizeStringEntries([" a ", 42, "", "  ", "z"])).toEqual(["a", "42", "z"]);
+    expect(normalizeStringEntries([" ok ", null, { toString: () => " obj " }])).toEqual([
+      "ok",
+      "null",
+      "obj",
+    ]);
     expect(normalizeStringEntries(undefined)).toEqual([]);
   });
 

src/shared/string-normalization.ts

@@ -1,8 +1,8 @@
-export function normalizeStringEntries(list?: Array<string | number>) {
+export function normalizeStringEntries(list?: ReadonlyArray<unknown>) {
   return (list ?? []).map((entry) => String(entry).trim()).filter(Boolean);
 }
 
-export function normalizeStringEntriesLower(list?: Array<string | number>) {
+export function normalizeStringEntriesLower(list?: ReadonlyArray<unknown>) {
   return normalizeStringEntries(list).map((entry) => entry.toLowerCase());
 }