fix: address follow-up review feedback

src/settings/settings-keybinding-controls.ts

@@ -140,8 +140,8 @@ export function renderMpvKeybindingsInput(
     removeButton.type = 'button';
     removeButton.textContent = 'Remove';
     removeButton.addEventListener('click', () => {
-      rows.splice(i, 1);
-      applyMpvRows(context, field, rows);
+      const nextRows = rows.filter((_, index) => index !== i);
+      applyMpvRows(context, field, nextRows);
       requestRender();
     });
     item.append(keyButton, command, removeButton);

src/settings/settings-model.test.ts

@@ -87,6 +87,27 @@ test('filterSettingsFields normalizes punctuation in query terms', () => {
   );
 });
 
+test('filterSettingsFields preserves non-Latin query terms', () => {
+  const japaneseFields: ConfigSettingsField[] = [
+    {
+      id: 'subtitleStyle.japaneseFontFamily',
+      label: '日本語フォント',
+      description: '字幕の表示に使う書体。',
+      configPath: 'subtitleStyle.japaneseFontFamily',
+      category: 'appearance',
+      section: 'Primary Subtitle Appearance',
+      control: 'text',
+      defaultValue: '',
+      restartBehavior: 'hot-reload',
+    },
+  ];
+
+  assert.deepEqual(
+    filterSettingsFields(japaneseFields, { query: '日本語' }).map((field) => field.configPath),
+    ['subtitleStyle.japaneseFontFamily'],
+  );
+});
+
 test('settings draft tracks dirty set and emits save operations', () => {
   const draft = createSettingsDraft({
     'subtitleStyle.autoPauseVideoOnHover': true,

src/settings/settings-model.ts

@@ -17,7 +17,7 @@ export interface SettingsDraft {
 }
 
 function normalizeQuery(query: string | undefined): string {
-  return (query ?? '').trim().toLowerCase();
+  return (query ?? '').trim().toLocaleLowerCase();
 }
 
 function searchableText(parts: Array<string | undefined>): string {
@@ -25,8 +25,8 @@ function searchableText(parts: Array<string | undefined>): string {
     .filter(Boolean)
     .join(' ')
     .replace(/([a-z0-9])([A-Z])/g, '$1 $2')
-    .replace(/[^a-zA-Z0-9]+/g, ' ')
-    .toLowerCase();
+    .replace(/[^\p{L}\p{N}]+/gu, ' ')
+    .toLocaleLowerCase();
 }
 
 function valuesEqual(a: unknown, b: unknown): boolean {