v0.275.0: a backup's data and its version travel together (R-696, 07 §6.6, D4 option A); R-695, R-691, R-694

The unit's data files are stamped with the versions that wrote them; the capture keeps the
definition the data belongs to; a restore never starts data under another version's
definition (unit restores refuse a mismatch; the off-site restore writes the snapshot's
definition); every tier's time is its data's; the conversion-copy release needs a dump on
the new engine. File-browser sync single-flight + no empty kept folder (R-695); the kept
view joins the folder's owning group, language switch resyncs (R-691); a restore-generated
login is not shown as the password (R-694). Red-proofs in
felhom.eu/documentation/audits/version-travel-2026-09-26/.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/web/i18n_cases_a_test.go

@@ -175,6 +175,13 @@ func i18nCasesA() []i18nCase {
 		{"deploy_deployed_stopped", "deploy", func() map[string]interface{} {
 			return i18nDeployData(true, stacks.StateStopped, 2)
 		}},
+		// v0.275.0 (R-694): a login the restore generated — no value, the "use your old password" hint.
+		{"deploy_deployed_restored_login", "deploy", func() map[string]interface{} {
+			d := i18nDeployData(true, stacks.StateRunning, 1)
+			d["DeployedFieldValues"] = map[string]string{"SUBDOMAIN": "paste"}
+			d["RestoredLogins"] = map[string]bool{"ADMIN_PASSWORD": true}
+			return d
+		}},
 		{"settings_system_full", "settings_system", func() map[string]interface{} {
 			d := i18nLayoutData("settings", "Rendszer beállítások")
 			d["CustomerID"], d["CustomerDomain"] = "test-customer", "example.hu"