v0.319.0: the app page in panels, the login in one place, a password the box never had is said in words

- style A (operator 2026-10-16): hero, tab bar and every section are panels on --bg-1, one width, 16px apart;
  the install page's form groups use the same rule; the settings tab's 700px inner wrapper is gone
- „Belépés az alkalmazásba": name + password side by side, fetched on demand (R-254, R-709); pairing in app_login.go
- the empty-value rule: no stored value -> a sentence, never an eye; page and reveal endpoint share storedValuePresent
- „Cím és kulcsok" is rows (no Domain input, no disabled storage select, no install form); hint under the title
- tests red-proved: app_page_tuning_test.go (4); 36 app-page parity fixtures re-captured, 4 new; install fixtures unchanged

Claude-Session: https://claude.ai/code/session_012qRErfCoiTkvDK9N5XHbzb

controller/internal/i18n/locales/en.json

@@ -118,6 +118,11 @@
   "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.",
+  "app_page.login_title": "Signing in to the app",
+  "app_page.login_desc": "For the first sign-in. If you change the password in the app, the old one stays here.",
+  "app_page.login_no_password": "The box saved no password for this install. Sign in with the one you set in the app.",
+  "app_page.login_no_name": "The box saved no user name for this install. Sign in with the one you set in the app.",
+  "app_page.value_no": "No",
   "app_page.after_start_btn": "Save",
   "app_page.after_start_title": "One more step",
   "app_page.faq": "Frequently asked questions",