R-621: the hold panel points at the log the hold kept

A held app's page now says, inside the hold panel, that the app's own log from
before it was stopped was kept, with a Napló link to the logs page that serves
it (0b93e1a). Shown only for an update hold with a non-empty kept log
(Manager.HoldLogKept). New copy through the bundle (hu + en), parity case
app_info_hold_log captured when born.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/i18n/locales/en.json

@@ -157,6 +157,7 @@
   "app_info.mentesek": "Backups",
   "app_info.mire_hasznalhato": "What is it for?",
   "app_info.naplo": "Log",
+  "app_info.hold_log_kept": "The app's own log from before it was stopped was kept — it shows why the new version did not start.",
   "app_info.nincs_folyamatban_athelyezes": "No move in progress.",
   "app_info.regi_adatok_torlese": "Deleting old data",
   "app_info.telepites": "Install",

controller/internal/i18n/locales/hu.json

@@ -153,6 +153,7 @@
   "app_info.mentesek": "Mentések",
   "app_info.mire_hasznalhato": "Mire használható?",
   "app_info.naplo": "Napló",
+  "app_info.hold_log_kept": "Az alkalmazás saját naplója megmaradt a leállítás előttről — ebből látszik, miért nem indult el az új változat.",
   "app_info.nincs_folyamatban_athelyezes": "Nincs folyamatban áthelyezés.",
   "app_info.regi_adatok_torlese": "Régi adatok törlése",
   "app_info.telepites": "Telepítés",