test: cover locale-stable note subtitles

src/utils/noteListHelpers.extra.test.ts

@@ -41,6 +41,7 @@ describe('noteListHelpers extra coverage', () => {
   })
 
   afterEach(() => {
+    vi.restoreAllMocks()
     vi.useRealTimers()
   })
 
@@ -76,6 +77,28 @@ describe('noteListHelpers extra coverage', () => {
     expect(formatSearchSubtitle(modifiedEntry)).toBe('1h ago · Created 2d ago · 1,200 words · 2 links')
   })
 
+  it('keeps note subtitle counts stable under non-English default number formatting', () => {
+    const originalToLocaleString = Number.prototype.toLocaleString
+    vi.spyOn(Number.prototype, 'toLocaleString').mockImplementation(function (
+      this: number,
+      locales?: Intl.LocalesArgument,
+      options?: Intl.NumberFormatOptions,
+    ) {
+      return originalToLocaleString.call(this, locales ?? 'de-DE', options)
+    })
+
+    const entry = makeEntry({
+      title: 'Project',
+      modifiedAt: Math.floor(Date.now() / 1000) - 3600,
+      createdAt: Math.floor(Date.now() / 1000) - 86400 * 2,
+      wordCount: 1200,
+      outgoingLinks: ['alpha', 'beta'],
+    })
+
+    expect(formatSubtitle(entry)).toBe('1h ago · 1,200 words · 2 links')
+    expect(formatSearchSubtitle(entry)).toBe('1h ago · Created 2d ago · 1,200 words · 2 links')
+  })
+
   it('extracts sortable properties and labels custom property sort keys', () => {
     const entries = [
       makeEntry({ properties: { Priority: 'High', Owner: 'Luca' } }),