Poster search per poster found (LATERAL on releases_poster_newest_idx), at most 200 posters

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/functional/poster_search.spec.ts

@@ -24,14 +24,21 @@ test.group('Poster search', (group) => {
       { 'subject': `[1/1] - "${name}" yEnc (1/1)`, 'from': from, 'date': 'Mon, 05 Oct 2026 10:00:00 +0000', 'message-id': `<ps${n}@x>`, ':bytes': '1000', 'xref': `x ${GROUP}:${n}` },
     ]
     const ix = new RangeIndexer({ group: GROUP, start: 1, end: 1000, rules: { ...DEFAULT_RULES, samplePercent: 0, droppedSignatures: [], priorities: { [GROUP]: 1 } } })
-    ix.add([post(1, 'Kitchen Cook <cook@example.com>', 'Soup.Recipes.2026.rar'), post(2, 'Kitchen Cook <cook@example.com>', 'Bread.Recipes.2026.rar'), post(3, 'Gardener <garden@example.com>', 'Roses.2026.rar')], 4)
+    ix.add([post(1, 'Kitchen Cook <cook@example.com>', 'Soup.Recipes.2026.rar'), post(2, 'Kitchen Cook <cook@example.com>', 'Bread.Recipes.2026.rar'), post(3, 'Gardener <garden@example.com>', 'Roses.2026.rar'), post(4, 'Kitchen Helper <help@example.com>', 'Cake.2026.rar')], 5)
     ix.finish()
     await BatchStore.store(Number(range.id), Number(node.id), ix.take())
 
-    assert.sameMembers((await db.from('posters').select('poster')).map((p) => p.poster), ['Kitchen Cook <cook@example.com>', 'Gardener <garden@example.com>'])
+    assert.sameMembers((await db.from('posters').select('poster')).map((p) => p.poster), ['Kitchen Cook <cook@example.com>', 'Gardener <garden@example.com>', 'Kitchen Helper <help@example.com>'])
     const found = await SearchService.search({ poster: 'kitchen' })
-    assert.equal(found.total, 2)
-    assert.isTrue(found.releases.every((r) => r.poster === 'Kitchen Cook <cook@example.com>'))
+    assert.equal(found.total, 3)
+    assert.isTrue(found.releases.every((r) => r.poster?.startsWith('Kitchen')))
+    // Pages over the posters found, merged in the order asked.
+    const second = await SearchService.search({ poster: 'kitchen', perPage: 2, page: 2 })
+    assert.equal(second.total, 3)
+    assert.equal(second.releases.length, 1)
+    const all = [...(await SearchService.search({ poster: 'kitchen', perPage: 2, page: 1 })).releases, ...second.releases].map((r) => r.id)
+    assert.sameMembers(all, found.releases.map((r) => r.id))
+    assert.equal((await SearchService.search({ poster: 'cook', q: 'Bread' })).total, 1)
     assert.equal((await SearchService.search({ poster: 'nobody' })).total, 0)
   })
 })