ENH - paginate Gallery in batches of 30

frontend/src/utils/media.test.ts

@@ -3,6 +3,7 @@ import { describe, expect, it } from 'vitest'
 import {
   filterMedia,
   formatRecordingDuration,
+  hasNextMediaPage,
   mediaErrorKey,
   mergeMedia,
 } from './media'
@@ -32,6 +33,12 @@ describe('media utilities', () => {
     ])
   })
 
+  it('loads another gallery page only after a full 30-item batch', () => {
+    expect(hasNextMediaPage(30)).toBe(true)
+    expect(hasNextMediaPage(29)).toBe(false)
+    expect(hasNextMediaPage(0)).toBe(false)
+  })
+
   it('formats unlimited recording durations', () => {
     expect(formatRecordingDuration(0)).toBe('00:00')
     expect(formatRecordingDuration(3_725_000)).toBe('62:05')