feat(settings): add accent-insensitive search filter with tests

components/settings/index/searchFilter.test.ts

@@ -0,0 +1,22 @@
+import { expect, test } from "bun:test";
+import { matchesQuery, normalize } from "./searchFilter";
+
+test("normalize strips accents and lowercases", () => {
+  expect(normalize("Légèreté")).toBe("legerete");
+  expect(normalize("  AUDIO ")).toBe("audio");
+});
+
+test("matchesQuery matches title case/accent-insensitively", () => {
+  expect(matchesQuery({ title: "Apparence", keywords: [] }, "appar")).toBe(
+    true,
+  );
+  expect(
+    matchesQuery({ title: "Audio", keywords: ["sous-titres"] }, "SOUS"),
+  ).toBe(true);
+  expect(matchesQuery({ title: "Music", keywords: [] }, "xyz")).toBe(false);
+});
+
+test("matchesQuery returns true for empty query", () => {
+  expect(matchesQuery({ title: "Anything" }, "")).toBe(true);
+  expect(matchesQuery({ title: "Anything" }, "   ")).toBe(true);
+});

components/settings/index/searchFilter.ts

@@ -0,0 +1,14 @@
+export const normalize = (s: string): string =>
+  s.normalize("NFD").replace(/[̀-ͯ]/g, "").toLowerCase().trim();
+
+export interface Searchable {
+  title: string;
+  keywords?: string[];
+}
+
+export const matchesQuery = (item: Searchable, query: string): boolean => {
+  const q = normalize(query);
+  if (!q) return true;
+  const hay = normalize([item.title, ...(item.keywords ?? [])].join(" "));
+  return hay.includes(q);
+};