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/style.css

@@ -2127,3 +2127,84 @@ a.stat-card:hover {
     .restore-label { min-width: auto; }
     .restore-select { max-width: 100%; }
 }
+
+/* ===================================================================
+   Storage Init Wizard & Migration UI
+   =================================================================== */
+
+.disk-progress-steps {
+    display: flex;
+    flex-direction: column;
+    gap: .5rem;
+    margin-top: 1rem;
+}
+
+.disk-step {
+    display: flex;
+    align-items: center;
+    gap: .75rem;
+    padding: .5rem .75rem;
+    border-radius: 8px;
+    color: var(--text-secondary);
+    font-size: .9rem;
+    background: var(--bg-primary);
+}
+
+.disk-step-icon {
+    font-size: 1.1rem;
+    min-width: 1.4rem;
+}
+
+.disk-step.disk-step-done {
+    color: var(--text-primary);
+}
+
+.disk-step.disk-step-active {
+    background: rgba(0, 136, 204, 0.08);
+    color: var(--accent-light);
+    border: 1px solid rgba(0, 136, 204, 0.2);
+}
+
+.disk-progress-bar-wrap {
+    display: flex;
+    align-items: center;
+    gap: 1rem;
+}
+
+.disk-progress-bar-wrap .system-bar {
+    flex: 1;
+}
+
+.deploy-storage-info {
+    background: var(--bg-primary);
+    border: 1px solid var(--border-color);
+    border-radius: var(--radius);
+    padding: 1.25rem;
+    margin-bottom: 1rem;
+}
+
+.deploy-storage-info h4 {
+    font-size: .95rem;
+    font-weight: 600;
+    color: var(--text-secondary);
+    text-transform: uppercase;
+    letter-spacing: .05em;
+    margin-bottom: .75rem;
+}
+
+.storage-app-row {
+    display: flex;
+    align-items: center;
+    gap: .75rem;
+    padding: .35rem 0;
+}
+
+.storage-app-link {
+    color: var(--accent-light);
+    text-decoration: none;
+    font-size: .9rem;
+}
+
+.storage-app-link:hover {
+    text-decoration: underline;
+}