fix(block2): clearer market states — 'can't reach servers' (retry) vs 'set your area'

Feedback: the market sometimes looked 'disabled'. Now the offline/empty states
are distinct and honest:
- No working relay (defaults exist, so it's a reachability issue) → 'Can't reach
  the community servers right now' + a Retry.
- Online but no area set → 'Set your area' prompt (you'd otherwise see a bare
  'nothing nearby').
- Area set + nothing found → the existing empty state.

i18n en/es/pt; offline tests updated; analyzer clean.

apps/app_seeds/lib/i18n/es.i18n.json

@@ -339,6 +339,11 @@
     "notSetUp": "Aún no has configurado el compartir",
     "notSetUpBody": "Activa el compartir para ver y dar semillas a gente cercana. Se mantiene aproximado — tu zona, nunca tu dirección exacta.",
     "setUp": "Configurar el compartir",
+    "cantReach": "No se puede conectar con los servidores ahora mismo",
+    "cantReachBody": "Inténtalo de nuevo, o revisa los servidores en la configuración avanzada.",
+    "retry": "Reintentar",
+    "setArea": "Indica tu zona",
+    "setAreaBody": "Dile al mercado tu zona aproximada para ver semillas cerca.",
     "searching": "Buscando por tu zona…",
     "empty": "Aún no hay semillas compartidas cerca de ti",
     "near": "Cerca de ti",