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>

CHANGELOG.md

@@ -1,5 +1,17 @@
 ## Changelog
 
+### What was just completed (2026-02-17 session 28)
+- **v0.11.0 — Phase C: Storage Init, Data Migration & Startup Fixes:**
+  - **Step 0: Startup ping + hub report** — Controller now fires heartbeat ping, system_health ping, and hub report immediately on startup (5s delay) instead of waiting for first scheduler tick (5-15 min). `hubPusher` instance created once and reused for both startup and periodic reports. Prevents Healthchecks showing stale "Last Ping: X ago" after restarts.
+  - **Step 1-3: Storage initialization wizard** — New `internal/storage/` package (`scan.go`, `format.go`, `safety.go`, `format_linux.go`, `safety_linux.go`, `scan_linux.go` + non-linux stubs). `ScanDisks()` via `lsblk -J`. `FormatAndMount()` with progress channel (partition via sfdisk → mkfs.ext4 → blkid UUID → fstab backup + UUID-based entry → mount → chown + subdirs). Safety guards: system disk detection via major device numbers, mount path conflict, confirmation "FORMÁZÁS" required. New wizard page at `/settings/storage/init`. JSON API endpoints at `/api/storage/scan`, `/api/storage/init`, `/api/storage/init/status`. Auto-registers storage path in settings.json after success.
+  - **Step 4-5: Data migration** — New `MigrateAppData()` in `internal/storage/migrate.go`. Per-app "Mozgatás" button on deploy page (for deployed apps with HDD data) and settings page storage app list. Migration flow: stop app → rsync with `--info=progress2` progress parsing → update `app.yaml` HDD_PATH → start app. Rollback on failure (revert config + restart with original path). Old data preserved. New migration page at `/stacks/{name}/migrate`. JSON API at `/api/storage/migrate`, `/api/storage/migrate/status`.
+  - **Step 6: Per-app storage display** — Deploy page (read-only mode) now shows "Adattárolás" section for deployed apps: current path + label, data size, free space. "Mozgatás" link shown when other storage paths exist.
+  - **Step 7: Container setup** — Added `privileged: true` to `docker-compose.yml`. New volume mounts: `/dev:/dev`, `/etc/fstab:/host-fstab`, `/run/udev:/run/udev:ro`. Docker socket changed from `:ro` to writable. `Dockerfile` adds: `util-linux`, `e2fsprogs`, `rsync`, `parted`.
+  - **Storage API routing** — New `/api/storage/` prefix registered in `main.go` before `/api/` catch-all (longer prefix takes priority in Go ServeMux). `ServeStorageAPI` method on web.Server handles all storage JSON endpoints.
+  - **CSS additions** — `.disk-step`, `.disk-step-active`, `.disk-step-done`, `.disk-progress-steps`, `.disk-progress-bar-wrap`, `.deploy-storage-info` styles.
+  - **Files created (13):** `storage/scan.go`, `storage/scan_linux.go`, `storage/scan_other.go`, `storage/safety.go`, `storage/safety_linux.go`, `storage/safety_other.go`, `storage/format.go`, `storage/format_linux.go`, `storage/format_other.go`, `storage/migrate.go`, `web/storage_handlers.go`, `templates/storage_init.html`, `templates/migrate.html`
+  - **Files modified (8):** `main.go`, `web/server.go`, `web/handlers.go`, `templates/settings.html`, `templates/deploy.html`, `templates/style.css`, `docker-compose.yml`, `Dockerfile`
+
 ### What was just completed (2026-02-17 session 27)
 - **v0.10.0 — Phase B: Storage Management UI Polish & Health Severity Fix:**
   - **Step 0: Health severity fix** — `checkStoragePaths()` mount-point check reclassified from **issue** (FAIL) to **warning** (WARN). All storage health messages translated to Hungarian. Added `.monitoring-banner-warn` CSS class for yellow warning banners. Prevents false FAIL status on demo/test environments where storage is intentionally on SSD.