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/share_handlers.go

@@ -146,7 +146,7 @@ func (s *Server) renderShareGuestPage(w http.ResponseWriter, r *http.Request) {
 		"Apps":   s.guestLauncherApps(),
 	}
 	w.Header().Set("Content-Type", "text/html; charset=utf-8")
-	if err := s.tmpl.ExecuteTemplate(w, "launcher_shared", data); err != nil {
+	if err := s.executeTemplateLang(w, r, "launcher_shared", data); err != nil {
 		s.logger.Printf("[ERROR] [web] Template error (launcher_shared): %v", err)
 		http.Error(w, "Internal error", http.StatusInternalServerError)
 	}
@@ -163,7 +163,7 @@ func (s *Server) renderSharePasswordPage(w http.ResponseWriter, r *http.Request,
 		"Error":  errMsg,
 	}
 	w.Header().Set("Content-Type", "text/html; charset=utf-8")
-	if err := s.tmpl.ExecuteTemplate(w, "launcher_share_password", data); err != nil {
+	if err := s.executeTemplateLang(w, r, "launcher_share_password", data); err != nil {
 		s.logger.Printf("[ERROR] [web] Template error (launcher_share_password): %v", err)
 		http.Error(w, "Internal error", http.StatusInternalServerError)
 	}