feat(web): tane.comunes.org landing + localized app screenshots

- Hugo site (site/): EN/ES intro + legal (generated from docs/legal), an
  ES/EN About page from docs/{que-es-tane,what-is-tane}.md, seed-green theme,
  responsive header, store-badge placeholders, multi-stage Hugo->nginx image.
- Golden screenshot harness (test/screenshots/): en,es,fr,de,pt,ja + RTL demo,
  real fonts via DejaVu Sans + FontManifest; skip-by-default tag so CI stays
  green. collect_screenshots.sh feeds site/ and fastlane phoneScreenshots.
- Drop editorial notes from the public explainer.

site/i18n/en.toml

@@ -0,0 +1,35 @@
+[skipToContent]
+other = "Skip to content"
+
+[navAbout]
+other = "About"
+
+[navLegal]
+other = "Legal"
+
+[navHome]
+other = "Home"
+
+[screenshotsTitle]
+other = "A look inside"
+
+[getItTitle]
+other = "Get Tane"
+
+[getItComingSoon]
+other = "Publishing to app stores soon. Meanwhile, Tane is free software you can build and run today."
+
+[legalIntro]
+other = "The plain-language documents that govern Tane. Short version: your data stays on your device, Tane is only a tool, and you are responsible for the seeds you share."
+
+[footerFreeSoftware]
+other = "Free software (AGPL-3.0). No ads, no commissions, no data selling."
+
+[footerPublishedBy]
+other = "Published by"
+
+[footerContact]
+other = "Contact"
+
+[backToHome]
+other = "Back to home"

site/i18n/es.toml

@@ -0,0 +1,35 @@
+[skipToContent]
+other = "Saltar al contenido"
+
+[navAbout]
+other = "Qué es Tane"
+
+[navLegal]
+other = "Legal"
+
+[navHome]
+other = "Inicio"
+
+[screenshotsTitle]
+other = "Un vistazo por dentro"
+
+[getItTitle]
+other = "Consigue Tane"
+
+[getItComingSoon]
+other = "Pronto en las tiendas de aplicaciones. Mientras tanto, Tane es software libre que puedes compilar y usar hoy."
+
+[legalIntro]
+other = "Los documentos, en lenguaje claro, que rigen Tane. En resumen: tus datos se quedan en tu dispositivo, Tane es solo una herramienta, y tú eres responsable de las semillas que compartes."
+
+[footerFreeSoftware]
+other = "Software libre (AGPL-3.0). Sin anuncios, sin comisiones, sin venta de datos."
+
+[footerPublishedBy]
+other = "Publicado por"
+
+[footerContact]
+other = "Contacto"
+
+[backToHome]
+other = "Volver al inicio"