v0.249.0: i18n slice 1 release B — backup pages in English, Hungarian byte-identical (R-556)

Seven backup pages + the restore-progress JS converted against fixtures captured unconverted
(f8ebc47); recovery renders through executeTemplateLang; English retrieval claims registered;
the Fut comparison left unconverted (R-563).

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

controller/internal/web/i18n_cases_b_test.go

@@ -123,6 +123,16 @@ func i18nCasesB() []i18nCase {
 			d["Backup"].(m)["DiscoveredDBs"] = []m{}
 			return d
 		}},
+		{"backups_apps_stale_copy", "backups_apps", func() map[string]interface{} {
+			d := i18nAppsData("ok", false, true, "dumps")
+			rows := d["AppBackupRows"].([]m)
+			for _, r := range rows {
+				if r["StackName"] == "oksucc" {
+					r["Tier2StaleCopy"] = true
+				}
+			}
+			return d
+		}},
 		{"backups_apps_empty", "backups_apps", func() map[string]interface{} { return i18nLayoutData("backups-apps", "Alkalmazás mentések") }},
 		{"backups_remote_full", "backups_remote", func() map[string]interface{} {
 			return i18nRemoteData(func(d, o m) {