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/templates/settings.html

@@ -117,6 +117,7 @@
                             <div class="storage-app-row">
                                 <a href="/apps/{{.Stack}}" class="storage-app-link">{{.Name}}</a>
                                 {{if .SizeHuman}}<span class="mono form-hint">{{.SizeHuman}}</span>{{end}}
+                                <a href="/stacks/{{.Stack}}/migrate" class="btn btn-xs btn-outline" title="Adatok áthelyezése másik tárolóra">📦 Mozgatás</a>
                             </div>
                             {{end}}
                         </div>
@@ -163,8 +164,12 @@
     </div>
     {{end}}
 
+    <div style="margin-top:1rem;display:flex;gap:.75rem;flex-wrap:wrap">
+        <a href="/settings/storage/init" class="btn btn-sm btn-outline">🔧 Új meghajtó inicializálása</a>
+    </div>
+
     <details class="storage-add-details">
-        <summary class="btn btn-sm btn-outline" style="margin-top:1rem;cursor:pointer">Új adattároló hozzáadása</summary>
+        <summary class="btn btn-sm btn-outline" style="margin-top:.75rem;cursor:pointer">Már csatlakoztatott tárhely hozzáadása kézzel</summary>
         <form method="POST" action="/settings/storage/add" class="storage-add-form">
             <div class="form-group">
                 <label for="storage_path">Elérési út</label>