chore(release): prep v0.1.16 — say plainly which servers Tane talks to

The store listing claimed "No account, no server, no trackers" while the
app was dialling four relays at launch. The app side is fixed; this is
the half a reader sees.

- Store description, both locales: the false line is gone, and a new
  "Sharing needs the internet" block names relay.comunes.org (ours),
  nos.lol, relay.damus.io and relay.primal.net, says when Tane talks to
  them, what they can see (a key and an IP — no name, no account), and
  where to switch any or all of them off, or point Tane at your own.
  Deliberately plain: no protocol names, no jargon. The audience is
  gardeners; the technical detail belongs in the F-Droid thread.
- The same correction on the landing page (feature card, FAQ, status).
- 0.1.16+18, so the F-Droid recipe's versionCodes become 181/182/183.
  F-Droid reads fastlane metadata from the checkout of the newest built
  version, so the description only reaches it via a new release.

The recipe mirror's `commit:` still points at v0.1.15 — it needs a hash
that does not exist yet, and is synced here and in the fdroiddata fork
once v0.1.16 is tagged.

site/content/_index.en.md

@@ -16,7 +16,7 @@ pillars:
     body: "Add a seed or seedling with just a photo and a name — no Latin required. Note the year, how much you have, where it came from, germination tests. Search, filter, snap now and name later."
   - icon: "🔒"
     title: "Yours, and only yours"
-    body: "Works fully offline. No account, no server, no trackers. Everything is encrypted on your device. Keep an encrypted backup and a printed recovery sheet to restore your whole bank on a new device."
+    body: "Your seed book works with no internet at all, and Tane doesn't connect to anything until you join the sharing part. No account, no sign-up, no trackers. Everything is encrypted on your device. Keep an encrypted backup and a printed recovery sheet to restore your whole bank on a new device."
   - icon: "🤝"
     title: "Share, as it's always been done"
     body: "Mark what you have spare to give away, swap or sell. Someone nearby finds it and contacts you — no middleman. Print a catalog of what you share to take to a seed fair."

site/content/_index.es.md

@@ -16,7 +16,7 @@ pillars:
     body: "Añade una semilla o plantón con solo una foto y un nombre; sin latín. Anota el año, cuánta tienes, de dónde viene, pruebas de germinación. Busca, filtra, haz la foto ahora y ponle nombre después."
   - icon: "🔒"
     title: "Tuyo, y solo tuyo"
-    body: "Funciona totalmente sin conexión. Sin cuenta, sin servidor, sin rastreadores. Todo va cifrado en tu dispositivo. Guarda una copia cifrada y una hoja de recuperación impresa para restaurar todo tu banco en un dispositivo nuevo."
+    body: "Tu cuaderno de semillas funciona sin nada de internet, y Tane no se conecta a nada hasta que entras en la parte de compartir. Sin cuenta, sin registro, sin rastreadores. Todo va cifrado en tu dispositivo. Guarda una copia cifrada y una hoja de recuperación impresa para restaurar todo tu banco en un dispositivo nuevo."
   - icon: "🤝"
     title: "Compartir, como se ha hecho siempre"
     body: "Marca lo que te sobra para regalar, intercambiar o vender. Alguien cerca lo encuentra y te contacta, sin intermediarios. Imprime un catálogo de lo que compartes para llevar a una feria de semillas."