v0.6.13

0.6.13 — 2026-07-26

• Log messages are English now. README, UI, docs and changelog were English while the
  service logged in German — so anyone reporting a problem had to translate their own log
  first, and the diagnostic lines added in 0.6.10–0.6.12 were unreadable for most of the
  people they were written for. All user-facing log output is now English. (Code comments
  stay German; they are for whoever edits the source, not for whoever runs it.)