v0.316.2: two more leftovers on the data tab

Biztonsagi mentes was still a card — it sits directly in the tab, not inside a section, so the
.app-section scoping rule did not reach it. It is a section now.

The 2nd-copy heading still read '2. mentes beallitasa — <app>', because the locale key carries the
app name: it was a PAGE title, and a tab already says which app it is. New key
app_page.second_backup ('2. mentes' / 'Second backup'). This is the leftover the task named.

Found by looking at the rendered page, not the markup.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0117kRTSgs3rJWUFGxyoWN6Y

controller/internal/i18n/locales/en.json

@@ -114,6 +114,7 @@
   "app_import.tarolo": "Storage",
   "app_import.titkos": "Encrypted",
   "app_import.visszaallitas_inditasa": "Start restore",
+  "app_page.second_backup": "Second backup",
   "app_page.address_and_keys": "Address and keys",
   "app_page.address": "Address",
   "app_page.installed_readonly": "These were created at install time and cannot be changed.",

controller/internal/i18n/locales/hu.json

@@ -110,6 +110,7 @@
   "app_import.tarolo": "Tároló",
   "app_import.titkos": "Titkos",
   "app_import.visszaallitas_inditasa": "Visszaállítás indítása",
+  "app_page.second_backup": "2. mentés",
   "app_page.address_and_keys": "Cím és kulcsok",
   "app_page.address": "Cím",
   "app_page.installed_readonly": "Ezek telepítéskor jöttek létre, és nem módosíthatók.",