The "Reach + Pro" release. Addresses issue #15 (the warlordattack feedback set
covering UX at 1000+ ZIM scale) and issue #16 (Wikipedia maxi auto-updating to
mini), and delivers the Reach track: P2P distribution + accessibility.

Highlights

• Your downloads now share the load. Every Zimi that can torrent
  automatically helps distribute ZIMs instead of leaning on the Kiwix
  mirrors. On by default, seeding capped at a polite 2x, controlled by
  real switches in Server Settings.
• Share your library with nearby machines, no internet needed. Flip
  on Nearby and Zimi instances find each other on your network. When a
  nearby machine already has a ZIM you're browsing, a green pill lights
  up on the catalog card.
• Corruption-proof installs. Every downloaded file, whether torrent,
  HTTP, or LAN peer, must pass structural validation before it touches
  your library. A broken transfer can never replace a good ZIM.
• Accessible. If you browse by keyboard, listen by screen reader, or
  need high contrast, accessibility is built-in. 100/100 Lighthouse
  score across the app.
• The catalog and downloads got a real overhaul. Batch-select many
  ZIMs and grab them at once, watch real per-file progress with pause
  and resume, see what you're seeding back, and let the catalog hide
  things you already have.
• Smarter, safer updates. A full "maxi" Wikipedia will never
  silently downgrade to "mini" again (#16), auto-update follows Kiwix's
  new mirror URLs (#20), and the updates panel shows exactly what's
  waiting.
• Built for big libraries. A live activity bar shows background
  work, hot-cache pins your most-used ZIMs for instant search, and
  startup is dramatically lighter (#15).

Full details (engineering notes, fixes, QA history): CHANGELOG.md · v1.6.5...v1.7.0