v0.11.0 — Phase C: Storage Init Wizard, Data Migration & Startup Fix

- Startup ping: fire heartbeat + health + hub report immediately on boot
  (5s delay after scheduler start, instead of waiting 5-15 min for first tick)

- Storage init wizard: new internal/storage/ package with disk scanning
  (lsblk -J), format+mount pipeline (sfdisk → mkfs.ext4 → blkid → fstab →
  mount → chown), safety guards (system disk detection, confirmation "FORMÁZÁS"),
  progress channel, auto-register in settings.json

- Data migration: MigrateAppData() with rsync --info=progress2 progress parsing,
  stop/rsync/update-config/start flow, rollback on failure, old data preserved

- New pages: /settings/storage/init (wizard), /stacks/{name}/migrate (migration)
- New API routes: /api/storage/{scan,init,init/status,migrate,migrate/status}
- Deploy page: storage info section for deployed apps (path, size, free, migrate link)
- Settings page: "Mozgatás" button per app in storage path details
- Container: privileged: true, /dev:/dev, /etc/fstab:/host-fstab, /run/udev:/run/udev:ro
- Dockerfile: add util-linux, e2fsprogs, rsync, parted for disk ops

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

controller/internal/web/server.go

@@ -35,6 +35,10 @@ type Server struct {
 	sessions   map[string]*session
 	sessionsMu sync.RWMutex
 	done       chan struct{}
+
+	// Disk operation state (format/migrate jobs)
+	diskJobMu sync.Mutex
+	diskJob   *activeDiskJob
 }
 
 func NewServer(cfg *config.Config, stackMgr *stacks.Manager, cpuCollector *system.CPUCollector, backupMgr *backup.Manager, sched *scheduler.Scheduler, sett *settings.Settings, alertMgr *AlertManager, notif *notify.Notifier, logger *log.Logger, version string) *Server {
@@ -108,6 +112,12 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		s.settingsAppBackupHandler(w, r)
 	case path == "/backup/restore" && r.Method == http.MethodPost:
 		s.backupRestoreHandler(w, r)
+	case path == "/settings/storage/init":
+		s.storageInitHandler(w, r)
+	case strings.HasPrefix(path, "/stacks/") && strings.HasSuffix(path, "/migrate"):
+		name := strings.TrimPrefix(path, "/stacks/")
+		name = strings.TrimSuffix(name, "/migrate")
+		s.migratePageHandler(w, r, name)
 	case strings.HasPrefix(path, "/stacks/") && strings.HasSuffix(path, "/logs"):
 		name := strings.TrimPrefix(path, "/stacks/")
 		name = strings.TrimSuffix(name, "/logs")
@@ -132,6 +142,11 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+// ServeStorageAPI handles /api/storage/* routes (JSON API for disk operations).
+func (s *Server) ServeStorageAPI(w http.ResponseWriter, r *http.Request) {
+	s.storageAPIHandler(w, r)
+}
+
 // primaryHDDPath returns the first registered storage path, or the legacy config value.
 func (s *Server) primaryHDDPath() string {
 	if paths := s.settings.GetStoragePaths(); len(paths) > 0 {