More single-file splits from the re-index

Releases of one file whose counter announces many (910k of 3M after the
sixth reset's first minutes), by cause:
- An unquoted name with double spaces ("lara_bath  15of19 larabath_2.5.jpg",
  "Luisa:     (068 of 160)"): the subject is collapsed, the name wasn't,
  so it stayed in the remainder; it's taken out collapsed too.
- Audiobook and album tracks keyed by their own name ("RP - File 268 of
  295 - \"… Seeing A Large Cat - D11.16-22.mp3\"", "CANDYD :: \"Candy
  Dulfer - Candy Store - 11 - everytime.mp3\""): by the name without its
  numbers, as image sets.
- A size without a unit before the closing yEnc ("…mp3\" - 8123 yEnc").
- Random posters with separators ("SOFZRw1-OTEd@…", "…_OOW@…").
Both implementations; tests; fixtures identical (models: 267 -> 172).

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

lib/release/identity.ts

@@ -77,6 +77,8 @@ export function subjectRemainder(subject: string): string {
     // File sizes ("76.88 MB", "335555 Bytes", "336573 byt" cut off, "[347K]") differ per file.
     .replace(/\b\d+(?:[.,]\d+)?\s*(?:[kmgt]i?b|bytes?|byt)\b/gi, ' ')
     .replace(/\[\s*\d+(?:[.,]\d+)?\s*[kmgt]\s*\]/gi, ' ')
+    // A size without a unit right before the closing yEnc ("…mp3" - 8123 yEnc").
+    .replace(/\b\d+(\s+yEnc\s*)$/i, '$1')
     // File sizes follow "yEnc" at the end; other numbers (years, post ids) stay.
     .replace(/\byEnc\b(\s+\d+)?\s*$/i, ' ')
     .replace(/\byEnc\b/gi, ' ')
@@ -195,7 +197,8 @@ export function randomPoster(from: string): boolean {
   const close = open === -1 ? -1 : from.indexOf('>', open + 1)
   const address = close !== -1 ? from.slice(open + 1, close) : from.trim().split(' ')[0]
   const at = address.indexOf('@')
-  return looksRandom(at === -1 ? address : address.slice(0, at))
+  // Separators don't make a token less random ("SOFZRw1-OTEd", "vMgGYlZB9ZcTNk8WxYFGV_OOW").
+  return looksRandom((at === -1 ? address : address.slice(0, at)).replace(/[-_.]/g, ''))
 }
 
 export function releaseIdentity(input: ReleaseInput): ReleaseIdentity | null {
@@ -216,7 +219,13 @@ export function releaseIdentity(input: ReleaseInput): ReleaseIdentity | null {
   // Text outside the quotes that names the release, e.g. "Some.Release [01/45] - "x.rar"". A name that isn't
   // quoted (unquotedName: "DVDFab 8.2.0.5.rar (006/332)", "[keira_s04_0037_l.jpg" yEnc] (2/2)") is taken out
   // as the quotes would have been: otherwise every file of a set would name a release of its own.
-  const remainder = subjectRemainder(input.subject.includes(`"${input.name}"`) ? input.subject : input.subject.replace(input.name, ' ').replace(/"/g, ' '))
+  // The subject here has its spaces collapsed; the name may not ("lara_bath  15of19 larabath_2.5.jpg").
+  const collapsed = input.name.replace(/\s+/g, ' ').trim()
+  const remainder = subjectRemainder(
+    input.subject.includes(`"${input.name}"`)
+      ? input.subject
+      : (input.subject.includes(input.name) ? input.subject.replace(input.name, ' ') : input.subject.replace(collapsed, ' ')).replace(/"/g, ' ')
+  )
   // A document or comic is a release of its own (collections post hundreds under one subject).
   if (DOCUMENT.test(input.name)) return { key: hash('stem', poster, stem), name: stem.replace(DOCUMENT, '') || stem, fileTotal, source: 'stem' }
   const image = IMAGE.test(input.name)
@@ -252,6 +261,12 @@ export function releaseIdentity(input: ReleaseInput): ReleaseIdentity | null {
   }
   // An image without words around it: its set by its name (keyed as a stem, so "x.jpg" joins "x.part01.rar").
   if (image) return { key: hash('stem', poster, prefix || stem), name: prefix || stem, fileTotal, source: 'stem' }
+  // An audiobook's or album's tracks without a name around them: by their name without its numbers, as an
+  // image set ("… Seeing A Large Cat - D11.16-22.mp3", "Candy Dulfer - Candy Store - 11 - everytime.mp3").
+  if (AUDIO.test(input.name)) {
+    const tracks = stem.replace(/\d+\D*$/, '').replace(/\d+/g, ' ').replace(/[\s._-]+/g, ' ').trim()
+    if (tracks) return { key: hash('stem', poster, tracks), name: tracks, fileTotal, source: 'stem' }
+  }
   // The [i/M] total is informational, not part of the key: posters often
   // upload the par2 index without a counter, and it belongs to the same post.
   return { key: hash('stem', poster, stem), name: stem, fileTotal, source: 'stem' }