B2b: decommission orchestration + missing-storage indicator + re-enroll fix (v0.65.0)

agentapi.Decommission + handleStorageDecommission (migrate-all-or-none, Change 2):
migrate-then-decommission via the migration done-hook, or decommission-anyway (stop
apps, keep HDD_PATH). 'Hiányzó tárhely' badge on dashboard/stacks/app card when an
app's drive is decommissioned/disconnected/absent. Change 4: registerStoragePath
clears the decommissioned marker on re-enroll (ClearDecommissioned had no callers).
Non-hollow tests incl. mutation-proven Change-4 companion.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

controller/cmd/controller/main.go

@@ -231,7 +231,8 @@ func main() {
 	if backupMgr != nil {
 		backupMgr.SetMigrationRunningCheck(stackMgr.IsMigrating)
 	}
-	stackMgr.RecoverMigration(ctx)
+	// RecoverMigration is started AFTER the web server's done-hook is wired (below), so a resumed
+	// decommission-migration still finalizes the source decommission on completion.
 
 	// --- Initialize alert manager ---
 	alertMgr := web.NewAlertManager(logger)
@@ -637,6 +638,10 @@ func main() {
 
 	// --- Initialize web server ---
 	webServer := web.NewServer(cfg, stackMgr, cpuCollector, backupMgr, sched, sett, alertMgr, notifier, updater, logger, Version)
+	// Migration done-hook: a decommission-initiated migration finalizes the source decommission on
+	// success (soft-mark + agent). Wire it before RecoverMigration so a resumed one still finalizes.
+	stackMgr.SetMigrationDoneHook(webServer.OnMigrationDone)
+	stackMgr.RecoverMigration(ctx)
 	webServer.SetEncryptionKey(encKey)
 	webServer.SetAppExporter(appExporter)
 	webServer.SetIntegrationManager(integrationMgr)