i18n slice 1 release C: storage, sharing, sign-in, guest, catch-all and debug pages in English

- 11 templates converted (storage, storage_network, storage_init, storage_attach, sharing, login,
  claim, launcher_shared, launcher_share_password, catchall, debug); every key translated.
  Six ASCII-only Hungarian JS fragments the extractor missed were found by eye and converted by hand
  (", majd a(z)", "FIGYELEM:", "jelenlegi:", "mp", "p", " db").
- login, claim, both guest share pages and the catch-all render through executeTemplateLang (the
  household language; no session CSRF, no escrow reminder). renderLogin now takes the request.
- Page titles: TitleKey for storage, network storage, the two drive wizards and sharing.
  TestHandlerTitleKeysMatchHungarianTitle pins handler literal == hu.json value for every TitleKey.
- Tests: TestDirectRenderHandlersFollowLanguage (real routes, en + hu),
  TestI18nDirectRenderPagesHaveNoAdminChrome (escrow reminder due; none on the guest page).
- Fixture correction: the release C cases had invented page titles; the cases now carry the handlers'
  real titles (and the wizard pages their real page name), and those 12 fixtures were RE-CAPTURED from
  the unconverted templates at 0555091. The diff to the old fixtures is the <title> line (and the nav
  highlight on the two wizard pages) only.
- i18n gate: HU_FORMAL_CEILING 12 -> 16 — four more „ön" forms in the converted copy, unchanged by rule (R-516).

Hungarian: byte-identical (TestI18nParity against fixtures from unconverted templates).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/web/storage_handlers.go

@@ -344,11 +344,12 @@ func (s *Server) refuseAppNamespaceTarget(w http.ResponseWriter, target string)
 // storageWizardPageHandler renders the init/attach wizard page (the disk list + actions are driven
 // client-side from GET /api/disks; the form posts to /api/storage/{init,attach}).
 func (s *Server) storageWizardPageHandler(w http.ResponseWriter, r *http.Request, tmpl string) {
-	title := "Új meghajtó inicializálása"
+	title, titleKey := "Új meghajtó inicializálása", "page.title.storage_init"
 	if tmpl == "storage_attach" {
-		title = "Meglévő meghajtó csatolása"
+		title, titleKey = "Meglévő meghajtó csatolása", "page.title.storage_attach"
 	}
 	data := s.baseData(tmpl, title)
+	data["TitleKey"] = titleKey // i18n: the Hungarian title above is what hu renders
 	// executeTemplate, NOT render(): the wizard POSTs /api/storage/* with the csrf-meta token,
 	// and render() leaves {{.CSRFToken}} empty. Latent until the claim arc — on an unclaimed
 	// (auth-off) box CsrfProtect is skipped entirely, so the wizard had never run against a