feat: presence beyond the tab — PWA manifest and the Ghost Log recap

Usability wave Workstream C (#5, #7):
- manifest.webmanifest with existing 192/512/180 icons, linked in
  index.html with theme-color aligned to #07070d; no service worker.
- GET /api/seances/recent: last 12 of the seeker's own séances with
  entity, per-kind event counts (one GROUP BY) and up to 3 spirit
  echoes (one windowed query) — no per-session N+1.
- /log Ghost Log page: cards with GhostGlyph, relative in-fiction
  timestamps, counts and echo lines; LOG link in the séance topbar;
  en/es i18n parity.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend/src/i18n/coverage-check.mjs

@@ -39,6 +39,7 @@ const RULES = [
   ['codex.rarity.', RARITY],
   ['codex.sort.', ['recent', 'contacted']],
   ['codex.form.', ['wisp', 'banshee', 'fairy', 'shade']],
+  ['log.counts.', ['question', 'anomaly', 'utterance']],
   ['landing.stats.', ['entities', 'sessions', 'utterances', 'anomalies']],
   ['landing.modes.', ['radio', 'evp', 'wire', 'ouija']],
   ['shop.modules.', ['emfArray', 'geophone', 'spiritMic', 'uvIlluminator']],

frontend/src/i18n/en.json

@@ -17,7 +17,34 @@
     "devices": "devices",
     "seance": "séance",
     "enter": "enter",
-    "logout": "depart"
+    "logout": "depart",
+    "log": "log"
+  },
+  "log": {
+    "title": "GHOST LOG",
+    "subtitle": "every séance leaves a page behind",
+    "back": "return to the séance",
+    "loading": "leafing back through the log…",
+    "error": "the log will not open — the veil resists tonight",
+    "empty": "no séances yet — the log waits",
+    "noEntity": "no one answered",
+    "counts": {
+      "question_one": "{{count}} question",
+      "question_other": "{{count}} questions",
+      "anomaly_one": "{{count}} anomaly",
+      "anomaly_other": "{{count}} anomalies",
+      "utterance_one": "{{count}} utterance",
+      "utterance_other": "{{count}} utterances"
+    },
+    "time": {
+      "moments": "moments past",
+      "minutes_one": "a minute past",
+      "minutes_other": "{{count}} minutes past",
+      "hours_one": "an hour past",
+      "hours_other": "{{count}} hours past",
+      "days_one": "a day past",
+      "days_other": "{{count}} days past"
+    }
   },
   "landing": {
     "taglines": [

frontend/src/i18n/es.json

@@ -17,7 +17,34 @@
     "devices": "dispositivos",
     "seance": "sesión",
     "enter": "entrar",
-    "logout": "partir"
+    "logout": "partir",
+    "log": "registro"
+  },
+  "log": {
+    "title": "REGISTRO ESPECTRAL",
+    "subtitle": "cada sesión deja una página tras de sí",
+    "back": "volver a la sesión",
+    "loading": "hojeando el registro hacia atrás…",
+    "error": "el registro no se abre — el velo se resiste esta noche",
+    "empty": "aún no hay sesiones — el registro espera",
+    "noEntity": "nadie respondió",
+    "counts": {
+      "question_one": "{{count}} pregunta",
+      "question_other": "{{count}} preguntas",
+      "anomaly_one": "{{count}} anomalía",
+      "anomaly_other": "{{count}} anomalías",
+      "utterance_one": "{{count}} voz",
+      "utterance_other": "{{count}} voces"
+    },
+    "time": {
+      "moments": "hace instantes",
+      "minutes_one": "hace un minuto",
+      "minutes_other": "hace {{count}} minutos",
+      "hours_one": "hace una hora",
+      "hours_other": "hace {{count}} horas",
+      "days_one": "hace un día",
+      "days_other": "hace {{count}} días"
+    }
   },
   "landing": {
     "taglines": [