feat(city): add player marketplace, mission journal, character customization and presence

- Player-to-player marketplace with listings, buying and selling
- Mission system with progress tracking and money rewards
- Character appearance customization (skin, hair, face, beard, accessory)
- Multiplayer presence feed showing nearby citizens in near-real-time
- Admin world dashboard with live platform metrics
- Bus and train transportation with temporary ride state
- Mobile joystick controls and minimap HUD
- Education bonus applied to work salary

lang/es.json

@@ -217,5 +217,32 @@
     "city.exercise_max_health": "¡La salud ya está en el máximo!",
     "city.exerciseStart": "Empezando a ejercitarse…",
     "city.exerciseStop": "Ejercicio terminado.",
-    "city.ped_red": "Semáforo de peatón en rojo — espere la señal verde."
+    "city.ped_red": "Semáforo de peatón en rojo — espere la señal verde.",
+    "nav.world": "Mundo",
+    "admin.world.title": "Panel del mundo",
+    "admin.world.hint": "Métricas en vivo de la plataforma persistente.",
+    "admin.world.users": "Usuarios",
+    "admin.world.characters": "Personajes",
+    "admin.world.economy": "Economía",
+    "admin.world.trade_volume": "Volumen de trueques",
+    "admin.world.world": "Casas terminadas",
+    "admin.world.market": "Mercado",
+    "admin.world.missions": "Misiones",
+    "admin.world.health": "Salud media",
+    "admin.world.education": "Educación media",
+    "city.customize_saved": "Apariencia actualizada.",
+    "city.market_listed": "Anuncio publicado en el mercado.",
+    "city.market_bought": "¡Compra realizada!",
+    "city.market_unavailable": "Anuncio no disponible.",
+    "city.ride_need_stop": "Acérquese a una vía (autobús) o a los raíles (tren).",
+    "city.ride_bus_ok": "¡Has subido al autobús!",
+    "city.ride_train_ok": "¡Has subido al tren!",
+    "city.missions_done": "Misión completada",
+    "city.act_market": "Mercado",
+    "city.act_customize": "Apariencia",
+    "city.act_ride_bus": "Autobús",
+    "city.act_ride_train": "Tren",
+    "city.hud_minimap": "Mapa",
+    "city.online_now": "en línea",
+    "city.marketBuy": "Comprar"
 }