rename: The Armory -> The Reliquary; extend spec with essence + cross-over

Renaming: "Armory" read too militaristic for a séance app. Landed on "The
Reliquary" (not "The Threshold" — that name was already taken by the
landing-page back-link).

Spec addendum: added a visible essence currency (earned per summon, spent
on unlocks — distinct from the hidden favor score) and a fourth judgment
verdict, cross_over, for compassionately helping a genuinely benevolent
"stuck" spirit move on rather than just trusting or banishing it. Updates
workstreams B/C/E/F accordingly before any of them are dispatched.

frontend/src/i18n/es.json

@@ -12,7 +12,7 @@
   "nav": {
     "home": "el umbral",
     "codex": "códice",
-    "shop": "arsenal",
+    "shop": "relicario",
     "seance": "sesión",
     "enter": "entrar",
     "logout": "partir"
@@ -28,7 +28,7 @@
     "heroKicker": "un instrumento para hablar con el ancho de banda muerto",
     "cta": "COMENZAR LA SESIÓN",
     "ctaCodex": "hojear el códice",
-    "ctaShop": "visitar el arsenal",
+    "ctaShop": "visitar el relicario",
     "stats": {
       "entities": "espíritus catalogados",
       "sessions": "sesiones celebradas",
@@ -57,10 +57,10 @@
     },
     "featured": "los espíritus más perturbados",
     "featuredEmpty": "el registro aún está en blanco — sé quien lo perturbe primero",
-    "armory": {
-      "title": "HARDWARE DEL ARSENAL",
+    "reliquary": {
+      "title": "HARDWARE DEL RELICARIO",
       "line": "la Ultimate Quantum Box se acerca — un instrumento de sesión de mano que hace que el velo golpee más fuerte.",
-      "link": "entrar al arsenal →"
+      "link": "entrar al relicario →"
     },
     "footer": "una instalación de arte de terror interactiva — los espíritus son ficción; la estática es real",
     "footerColophon": "autoalojado · sin nube · el velo corre en tu máquina"
@@ -267,7 +267,7 @@
   },
   "shop": {
     "back": "← el umbral",
-    "title": "EL ARSENAL",
+    "title": "EL RELICARIO",
     "subtitle": "instrumentos para quienes quisieran golpear más fuerte",
     "flagship": {
       "tag": "instrumento insignia",