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/handlers.go

@@ -176,12 +176,12 @@ func (s *Server) dashboardHandler(w http.ResponseWriter, r *http.Request) {
 	sysInfo := system.GetInfo(s.primaryHDDPath(), s.cpuCollector)
 
 	data := s.baseData("dashboard", "Vezérlőpult")
-	data["TitleKey"] = "page.title.dashboard" // i18n: the Hungarian title above is what hu renders
+	data["TitleKey"] = "page.title.dashboard"        // i18n: the Hungarian title above is what hu renders
 	s.addRecoveryBanner(data, r)                     // R-241: the reminder bar, per visit
 	data["SettingsWarning"] = s.settings.LoadWarning // non-empty if settings.json was recovered from corruption
 	data["Stacks"] = deployedStacks
 	data["MissingStorage"] = s.missingStorageMap(deployedStacks)
-	data["OOMKilled"] = s.stackMgr.OOMKilledStacks() // R-514
+	data["OOMKilled"] = s.stackMgr.OOMKilledStacks()   // R-514
 	nw, ns := s.networkStorageWarnings(deployedStacks) // NAS unreachable (recoverable) / guest-side stub (defect)
 	data["NetworkWarnings"] = nw
 	data["NetworkStubs"] = ns
@@ -316,7 +316,7 @@ func (s *Server) launcherApps() []LauncherApp {
 func (s *Server) launcherHandler(w http.ResponseWriter, r *http.Request) {
 	data := s.baseData("launcher", "Indítópult")
 	data["TitleKey"] = "page.title.launcher" // i18n: the Hungarian title above is what hu renders
-	s.addRecoveryBanner(data, r) // R-241: the reminder bar, per visit
+	s.addRecoveryBanner(data, r)             // R-241: the reminder bar, per visit
 	data["Apps"] = s.launcherApps()
 
 	// Share modal state. The share URL is built from the request Host at render time (the canonical
@@ -1042,7 +1042,7 @@ func (s *Server) backupsRemoteHandler(w http.ResponseWriter, r *http.Request) {
 func (s *Server) backupsAppsHandler(w http.ResponseWriter, r *http.Request) {
 	data := s.backupsCommonData("backups-apps", "Biztonsági mentés — Alkalmazások", r)
 	data["TitleKey"] = "page.title.backups_apps" // i18n: the Hungarian title above is what hu renders
-	s.backupsOffboxData(data) // the tier-3 rows render $.Offbox status
+	s.backupsOffboxData(data)                    // the tier-3 rows render $.Offbox status
 
 	if fullStatus, ok := data["Backup"].(*backup.FullBackupStatus); ok && fullStatus != nil {
 		// Enrich AppDataInfo with storage labels
@@ -2102,6 +2102,7 @@ func (s *Server) systemPageData() map[string]interface{} {
 // data the unified agent-enriched drive view needs.
 func (s *Server) storagePageData() map[string]interface{} {
 	data := s.settingsBaseData("storage", "Tárhely")
+	data["TitleKey"] = "page.title.storage" // i18n: the Hungarian title above is what hu renders
 
 	// Storage paths with display data
 	storagePaths := s.settings.GetStoragePaths()
@@ -2154,6 +2155,7 @@ func (s *Server) storagePageData() map[string]interface{} {
 // drive page — the two storage classes were confusingly interleaved on one page.
 func (s *Server) networkStoragePageData() map[string]interface{} {
 	data := s.settingsBaseData("storage-network", "Hálózati tárhely")
+	data["TitleKey"] = "page.title.storage_network" // i18n: the Hungarian title above is what hu renders
 	data["NetworkStoragePaths"] = s.networkStorageItems(context.Background())
 	// Capability banner: "no" swaps the add form for the agent-outdated notice (yes/unknown render
 	// the form — flaky states belong to the add-time gate). Short-budget probe, cache-backed.