## Changelog

### What was just completed (2026-02-19 session 58)
- **v0.16.0 — Controller Self-Update:**

  Watchtower-style self-update mechanism. New package `internal/selfupdate/` with 3 files: `version.go` (semver parsing/comparison), `state.go` (audit log state file I/O), `updater.go` (registry check via Gitea V2 API, update trigger, startup verification).

  **Flow:** Gitea registry tag list → `docker pull` → atomic compose file rewrite → `docker compose up -d` → process replaced. State file (`update-state.json`) persists across restart as audit log; verified on next startup to detect success/failure.

  **Config:** `SelfUpdateConfig` extended with `AutoUpdateTime` field + defaults for `Image` and `AutoUpdateTime`. Scheduler jobs: periodic check every `check_interval` (default 6h); optional daily auto-update at `auto_update_time` (default 04:30).

  **API:** 3 new endpoints under `/api/selfupdate/` (`status`, `check`, `update`). Auth via session cookie OR `Authorization: Bearer <hub_api_key>` header (for external triggering from build scripts).

  **UI:** Settings page "Verzió és frissítés" card shows current/latest version, check time, auto-update status, last update result. "Frissítés keresése" button queries registry; "Frissítés telepítése" button appears when update is available. `pollUntilBack()` JS polls `/api/health` after triggering update and reloads when container is back up.

  **Notifications:** `NotifyUpdateSuccess()` and `NotifyUpdateFailed()` added to notifier for post-update startup verification results.

  **Alert:** Dashboard shows "Új controller verzió elérhető" info alert when update is available.

  **docker-compose.yml:** Added `/opt/docker/felhom-controller:/opt/docker/felhom-controller` directory bind mount (required for compose file access during self-update); named volume and read-only config override on top.

  **Files modified/created (12):** `internal/selfupdate/version.go` (NEW), `internal/selfupdate/state.go` (NEW), `internal/selfupdate/updater.go` (NEW), `internal/config/config.go`, `internal/notify/notifier.go`, `internal/api/router.go`, `internal/web/server.go`, `internal/web/handlers.go`, `internal/web/alerts.go`, `internal/web/templates/settings.html`, `cmd/controller/main.go`, `docker-compose.yml`

### What was just completed (2026-02-19 session 57)
- **v0.15.7 — Fix backup page storage display & rename system drive label:**

  Backup page ("Biztonsági mentés") now shows all registered storage paths instead of only a single "Külső HDD". Added `data["StorageBars"] = s.buildStorageBars()` to `backupsHandler` (was missing unlike dashboard/monitoring handlers). Updated `backups.html` storage bars section to use `StorageBars` loop (same pattern as monitoring page), replacing the old `{{if .HDDConfigured}}` single-HDD block.

  Renamed system root partition label from "SSD (/)" to "Rendszer (/)" on all three pages (backup, monitoring, dashboard), as the root filesystem is not necessarily on an SSD.

  **Files modified (4):** `internal/web/handlers.go`, `internal/web/templates/backups.html`, `internal/web/templates/monitoring.html`, `internal/web/templates/dashboard.html`

### What was just completed (2026-02-19 session 56)
- **v0.15.6 (controller) + hub v0.1.7 — Bug hunt fixes (BUGHUNT.md):**

  **Controller — Restore race conditions (P0-P1):** All 4 restore handlers (`restorePageHandler`, `apiRestoreStatus`, `apiRestoreAll`, `apiRestoreSkip`) now hold `restoreMu.RLock()` across nil-check and field reads. `apiRestoreAll` uses new `TryStartRestore()` method for atomic check-and-set (eliminates double-restore race). `executeAllRestores()` snapshots plan under lock, uses `SetStatus("done")` instead of direct write. Removed dead no-op goroutine.

  **Controller — restore_scan.go:** `dirIsEmpty()` now returns `false` on read errors (was silently treating unreadable dirs as empty, losing backup data). `Snapshot()` deep-copies Apps and Drives slices. Added `TryStartRestore()`, `SetStatus()`, `GetStatus()` helper methods.

  **Controller — infra_backup.go (P0):** `controller.yaml` read failure now returns a real error (was silently creating empty backup). `settings.json` and restic password read failures now logged. Added `logger *log.Logger` parameter to `BuildInfraBackup`.

  **Controller — main.go DR wiring:** Fixed ordering — `restoreSettingsFromHub` + settings reload now happens before `restorePasswordsFromHub` (prevents cross-drive password loss). Nil check after `ScanDrivesForBackups`. `os.MkdirAll` error now logged. `os.MkdirAll` added to `restoreSettingsFromHub` before write.

  **Hub — store.go (P2):** 5 `json.Unmarshal` calls now log `[WARN]` on failure. `GetInfraBackupMeta` logs unmarshal error instead of silently returning wrong counts.

  **docker-setup.sh (P0-P2):** DRY_RUN check moved to top of `run_config_wizard()` with dummy values (was prompting interactively even in dry-run). CF tunnel token quoted in docker-compose env. `htpasswd` uses `cut -d: -f2` + bcrypt format validation. `grep -qF` for literal path matching. Volume paths quoted in YAML output. Post-wizard validation rejects default `demo-felhom`/`homeserver.local` values.

  **restore.html (P2-P3):** Error text uses `textContent` instead of `innerHTML`. Poll errors counted; after 10 failures shows "Kapcsolat megszakadt" message instead of polling silently forever.

  **Files modified (controller, 6):** `internal/backup/restore_scan.go`, `internal/web/handler_restore.go`, `internal/report/infra_backup.go`, `cmd/controller/main.go`, `internal/web/templates/restore.html`, `scripts/docker-setup.sh`
  **Files modified (hub, 1):** `hub/internal/store/store.go`

### What was just completed (2026-02-19 session 55)
- **v0.15.5 — Fix startup hub report silently failing:**

  `Push()` now returns actual errors instead of always `nil`. Previously, push failures were logged internally but the caller could never detect them, leading to a misleading `[INFO] Startup hub report sent` log even when the push actually failed (e.g., hub returning HTTP 503 during simultaneous deployment). Removed the "Never returns error to caller" behavior: marshal error returns a wrapped error, and after 3 failed retries the error is returned to the caller (the internal `[WARN]` log before `return nil` is gone).

  Startup hub push now retries 3 times with 15-second delays between outer attempts, giving the hub time to come up when both are deployed together. Each outer attempt uses `Push()`'s own internal 3-retry logic (5s backoff), so the hub gets up to ~40s total to become ready. If all 3 outer attempts fail, logs a clear warning with the next scheduled push interval.

  **Files modified (2):** `internal/report/pusher.go`, `cmd/controller/main.go`

### What was just completed (2026-02-19 session 54)
- **v0.15.4 (controller) + hub v0.1.6 — Hub reporting improvements:**

  **Controller:** When `hub.enabled: false` but URL+API key are configured, the controller now creates the `Pusher` and sends a one-time "disabled" notification on startup (`health.status = "disabled"`, `reporting_disabled: true`). This replaces the old behavior where a disabled controller was indistinguishable from a crashed node. Added `PushOnce()` method to `Pusher` (bypasses the `enabled` flag). Added `ReportingDisabled` field to the `Report` struct.

  **Hub:** Added "disabled" status handling — when the latest report has `health_status = "disabled"`, the overall status is "disabled" (checked BEFORE the stale-time logic, so it stays "PAUSED" even after 30min+). Dashboard shows gray "PAUSED" badge. Customer detail shows "Reporting has been disabled on this node" with a hint to re-enable. Storage labels now shown (`label` field with fallback to `mount`). Report history timestamps now show date + time ("Feb 19 09:46" instead of "09:46:54"). New `.status-badge-disabled` CSS (neutral gray `#475569`).

  **Files modified (controller):** `internal/report/types.go`, `internal/report/pusher.go`, `cmd/controller/main.go`
  **Files modified (hub):** `hub/internal/web/server.go`, `hub/internal/web/templates/dashboard.html`, `hub/internal/web/templates/customer.html`, `hub/internal/web/templates/style.css`

### What was just completed (2026-02-19 session 53)
- **v0.15.3 — Show all storage paths on dashboard + fix hub report:**

  Dashboard ("Vezérlőpult") and monitoring ("Rendszermonitor") pages now show usage bars for ALL registered storage paths instead of just one hardcoded "Külső HDD" bar. New `StorageBarInfo` type and `buildStorageBars()` helper build bars from `settings.GetStoragePaths()`. Each bar shows the storage label and live disk usage.

  Hub storage report now correctly includes all registered storage paths with proper mount paths and labels. Previously it sent only root `/` plus one HDD entry using the deprecated (empty) `cfg.Paths.HDDPath`. Now uses `system.GetDiskUsage()` per storage path, same as the dashboard bars. Added `Label` field to `StorageReport` in `types.go`.

  **Files modified (5):** `internal/web/handlers.go`, `internal/web/templates/dashboard.html`, `internal/web/templates/monitoring.html`, `internal/report/builder.go`, `internal/report/types.go`

### What was just completed (2026-02-19 session 52)
- **v0.15.2 — Fix data loss on container restart (2 bugs):**

  **Bug 1:** Snapshot history delta stats (HOZZÁADOTT, ÚJ FÁJL, VÁLTOZOTT) showed 0 after container restart because restic doesn't store these stats — they were only in memory. Fixed by persisting the snapshot history ring buffer to `data/snapshot-history.json`. On startup, persisted stats are merged with restic repo snapshots. Added `saveSnapshotHistory()` (atomic write via tmp+rename), `loadSnapshotHistoryFromFile()`, updated `appendSnapshotRecord()` to save after each backup, and updated `LoadSnapshotHistory()` to merge persisted + restic data.

  **Bug 2:** DB validation (ÉRVÉNYESÍTÉS column) showed "–" after restart because the synthesized `LastDBDump.Results` didn't copy `Validation` from `DumpFileInfo`. One-line fix: added `Validation: f.Validation` to the synthesized `DumpResult` in `GetFullStatus()`.

  **Files modified:** `internal/backup/backup.go`

### What was just completed (2026-02-19 session 51)
- **v0.15.1 — Backup Page "Részletek" Overhaul:**

  Replaced the "Tároló" section on the backup page with a new "Részletek" section containing 3 collapsible tier sections with per-drive breakdowns.

  **Tier 1 (Helyi mentés):** Shows per-drive restic repo stats (size, snapshot count) with storage labels. Includes aggregated totals when multiple drives exist, plus DB dump summary, integrity check, and encryption key (all carried over).

  **Tier 2 (Másodlagos másolat):** Groups cross-drive backup items by destination drive, separated into restic and rsync method sections with per-app sizes.

  **Tier 3 (Távoli mentés):** Placeholder for future B2/S3/SFTP remote backup.

  **Restore UI improvements:** Snapshot dropdown now groups by tier (optgroup), shows tier label + drive name per snapshot (e.g., "1. szint, hdd_1"), and marks Tier 1 as recommended. Also lists Tier 2 (secondary restic) snapshots for visibility.

  **Backend:** New `DriveRepoInfo` struct, `perDriveRepoStats()` method, `ListAllSnapshots()` that includes secondary restic repos, and `Tier2DriveGroup` handler struct. `SnapshotInfo` now carries `Tier` and `DriveLabel` fields.

  **Files modified (5):** `internal/backup/backup.go`, `internal/backup/restic.go`, `internal/web/handlers.go`, `internal/api/router.go`, `internal/web/templates/backups.html`, `internal/web/templates/style.css`

### What was just completed (2026-02-18 session 50)
- **v0.15.0 — Attach Existing Drive (bind mount wizard):**

  New feature: Settings → "Meglévő meghajtó csatolása" wizard. Allows attaching a drive that already has a filesystem (ext4, etc.) without formatting. Solves the real-world scenario where a customer's drive contains existing data that must be preserved.

  **How it works:** The partition is mounted read-only at a hidden staging path (`/mnt/.felhom-raw/<label>`). A directory browser lets the user navigate the drive's contents and create a new folder. The selected folder is bind-mounted at `/mnt/<hdd-name>`, keeping the controller's data isolated from existing files. Two fstab entries (raw + bind, both with `nofail`) ensure the mount survives reboots.

  **Wizard flow:** Scan → Select partition (only shows partitions with existing FS) → Mount raw + Browse directories → Create folder if needed → Configure mount name + label → Finalize (bind mount + fstab + permissions + register). Cancel cleans up the temp mount.

  **New files (4):** `internal/storage/attach.go`, `internal/storage/attach_linux.go`, `internal/storage/attach_other.go`, `internal/web/templates/storage_attach.html`
  **Modified files (3):** `internal/web/storage_handlers.go` (6 new API handlers), `internal/web/server.go` (route + activeRawMount field), `internal/web/templates/settings.html` (button)

### What was just completed (2026-02-18 session 49)
- **v0.14.2 — Backup Bug Fixes (4 fixes from code review):**

  **Bug 1 (HIGH):** rsync `--delete` was destroying `_db/` and `_config/` directories on every single-mount run. Fixed by adding `--exclude _*` to the rsync command in `runRsyncBackup()`. Controller-managed directories (underscore prefix) are now excluded from `--delete` cleanup. (`crossdrive.go`)

  **Bug 2 (MEDIUM):** Scheduled backups (`RunBackup`, `RunDBDumps`) did not set `m.running`, so UI showed "not running" during nightly jobs and restore could overlap. Fixed by extracting `acquireRunning()` / `releaseRunning()` helpers and `runDBDumpsInternal()` / `runBackupInternal()` internal methods. All three public entry points now guard with the running flag; `RunFullBackup()` calls the internal methods directly to avoid deadlock. (`backup.go`)

  **Bug 3 (MEDIUM):** `ValidateDestination` silently succeeded when `GetDiskUsage` returned nil (exotic filesystems, FUSE, NFS). Fixed by logging `[WARN]` and returning nil (backward-compatible). (`crossdrive.go`)

  **Bug 4 (MEDIUM):** Empty `systemDataPath` produced relative dump paths. Fixed with: startup `[WARN]` in `NewManager()`, `[ERROR]` log in `GetAppDrivePath()`, and explicit guard in `DumpStackDB()` that returns an error when path is empty or non-absolute. (`backup.go`)

  **Files modified (2):** `internal/backup/backup.go`, `internal/backup/crossdrive.go`

### What was just completed (2026-02-18 session 48)
- **v0.13.1 — UI Polish Fixes Round 2 (4 fixes):**

  **Fix 1:** Deploy page "Biztonsági mentés" section now has proper card border. Root cause: `.deploy-cross-drive` used undefined CSS variables `--card-bg` and `--border` (only `--bg-secondary` and `--border-color` exist). Fixed by using correct vars (`style.css`).

  **Fix 2:** Auto-generated env values section cleaned up (`deploy.html`, `style.css`). Badge moved inline with label. "Másolás" buttons removed (native select+copy sufficient). Secret fields keep show/hide toggle. Non-secret fields now plain readonly input without button wrapper. Removed `copyAutoField()` JS. CSS updated: `.form-group-auto` now block layout (was flex row), label uses `display: flex; gap: .5rem`, badge downsized to `0.75rem / normal weight`, readonly inputs get muted background.

  **Fix 3:** Snapshot table n/a → 0 (`backups.html`). Replaced `<span class="col-na" title="...">n/a</span>` with plain `0` in all three stats columns. Removed `.col-na` CSS class (no longer used).

  **Fix 4:** Disk warnings moved from top banner to inline under storage bars (`alerts.go`, `layout.html`, `handlers.go`, `dashboard.html`, `monitoring.html`, `style.css`). Added `Inline bool` field to `Alert` struct. Disk-related warnings set `Inline: true`. Layout banner skips inline alerts. New `GetInlineAlerts(page)` method on `AlertManager`. Dashboard and monitoring handlers pass `DiskWarnings`. Inline warning block rendered below storage bars. New `.inline-warning*` CSS classes (compact, subtle, colored).

  **Files modified (8):** `alerts.go`, `handlers.go`, `templates/style.css`, `templates/dashboard.html`, `templates/backups.html`, `templates/deploy.html`, `templates/monitoring.html`, `templates/layout.html`

### What was just completed (2026-02-18 session 47)
- **v0.13.0 — UI Polish Fixes (8 independent fixes):**

  **Fix 1:** backup-status-card border already correct (verified same styling as system-info-card).

  **Fix 2:** Deploy page auto-generated fields now show actual values for deployed apps (`deploy.html`, `handlers.go`). Secrets show as password fields with show/hide toggle; domain/plain values show as readonly text with copy button. JS helpers `toggleAutoField()` / `copyAutoField()` added.

  **Fix 3:** Temperature display made more prominent (`dashboard.html`, `style.css`). Dot enlarged to 11px; value wrapped in colored pill badge (`.temp-value-pill` / `.temp-pill-{green|yellow|red}`).

  **Fix 4:** Dashboard backup card reworked (`dashboard.html`, `handlers.go`). Removed "Mentés most" button and `triggerBackup()` JS. Removed "Tároló méret" line. Added Tier 2 status line (configured/total apps) + warning row for failed cross-drive backups. Handler now computes `CrossDriveTotal`, `CrossDriveConfigured`, `CrossDriveFailed`.

  **Fix 5:** HDD warning banner scoped to dashboard + monitoring pages only (`alerts.go`, `layout.html`, `funcmap.go`). Added `PageOnly []string` field to `Alert` struct. Disk-related warnings (keywords "meghajtón", "adattároló") get stable ID `"disk-not-separate"` + `PageOnly: ["dashboard", "monitoring"]`. `pageMatch()` template function added. Layout renders alerts conditionally.

  **Fix 6:** Tárhely section moved up in Rendszermonitor — now appears right after "Rendszer áttekintés", before "Távoli monitoring" (`monitoring.html`).

  **Fix 7:** Snapshot table improvements (`backups.html`, `style.css`). "MÉRET" renamed to "HOZZÁADOTT (új adat)". `–` for unavailable data replaced with `n/a` (with tooltip explaining restic limitations). New `.col-subtitle` and `.col-na` CSS classes.

  **Fix 8:** Tároló section restructured into tiers (`backups.html`, `handlers.go`, `style.css`). Tier 1 (restic local), Tier 2 (cross-drive, only shown if configured), DB dump directory + total size. Removed "Távoli másolat: Nincs beállítva" placeholder. Handler passes `DBDumpDir`, `DBDumpTotalBytes`, `Tier2Dests` (deduplicated). New `.repo-tier` / `.repo-tier-title` CSS.

  **Files modified (9):** `alerts.go`, `funcmap.go`, `handlers.go`, `templates/style.css`, `templates/dashboard.html`, `templates/backups.html`, `templates/deploy.html`, `templates/monitoring.html`, `templates/layout.html`

### What was just completed (2026-02-18 session 46)
- **v0.12.9 — Tier 2 for All Apps + Status Dot Update:**

  **Fix 1: Tier 2 now configurable for ALL apps — not just HDD apps (`crossdrive.go`)**
  - Removed `len(mounts) == 0` error gate from `RunAppBackup()` — empty mounts = config-only backup
  - rsync: DB dump copy (`_db/`) + config rsync (`_config/`) still runs even with zero HDD mounts
  - restic: config dir + DB dump dir still appended even without mount paths
  - Non-HDD apps (Mealie, Gokapi, etc.) can now be protected against drive failure via Tier 2

  **Fix 2: Status dot logic updated, HasHDDData gate removed (`handlers.go`)**
  - `buildAppBackupRows()`: "auto" (gray) status removed — all apps start yellow ("Csak helyi mentés")
  - Green requires Tier 2 configured + last status "ok" (not just "configured but never run")
  - Tier2 section is now unconditional — no `if app.HasHDDData` gate
  - Cross-drive summary loop: removed `if !app.HasHDDData { continue }` — all apps in summary

  **Fix 3: Backup page template updates (`backups.html`)**
  - Tier 2 row shown for all apps (removed `{{if .HasHDDData}}` gate)
  - Meta badge: non-HDD apps show "Konfig" or "Konfig + DB" instead of "Auto"
  - Tier 3 placeholder row added (grayed out "Hamarosan / távoli offsite")
  - Button text: "Összes HDD mentés" → "Összes 2. mentés futtatása most"

  **Fix 4: Deploy page cross-drive section visible for all deployed apps (`deploy.html`)**
  - Removed `{{if .StorageInfo}}` double-gate — section now shows for all deployed apps
  - Updated heading: "Másolat másik meghajtóra (felhasználói adatok)" → "2. mentés — másolat másik meghajtóra"
  - Updated hint: "mint az alkalmazás adattárolója" → "a meghibásodás elleni védelem érdekében"

  **Files modified (4):** `internal/backup/crossdrive.go`, `internal/web/handlers.go`, `internal/web/templates/backups.html`, `internal/web/templates/deploy.html`

### What was just completed (2026-02-18 session 45)
- **v0.12.8 — Complete Cross-Drive Backup + Per-Tier UI:**

  **Fix 1: Cross-drive backup now includes DB dumps + app config (`crossdrive.go`, `main.go`)**
  - `CrossDriveRunner` gets `dbDumpDir` field + `SetDBDumpDir(dir string)` setter
  - `copyStackDBDumps()` helper copies `<stackName>_*.sql` files to `_db/` subfolder in rsync dest
  - `runRsyncBackup()`: after HDD mount rsync loop, copies DB dumps to `_db/` and rsyncs config dir to `_config/` — both non-fatal on error
  - `runResticBackup()`: appends config dir and full DB dump dir to restic paths (restic deduplicates)
  - rsync destination layout: `backups/rsync/<app>/_db/` (dumps) + `_config/` (compose+yaml) + user data
  - `main.go`: `crossDriveRunner.SetDBDumpDir(cfg.Paths.DBDumpDir)` wired after runner init

  **Fix 2: UI restructured from per-layer to per-tier (`handlers.go`, `backups.html`, `style.css`)**
  - `AppBackupRow` struct rebuilt: dropped old `DBLastRun/Status`, `VolumeLastRun/Status`, `HasUserData`, `UserDataConfigured/Method/Dest/Schedule/LastRun/LastStatus/LastError/StatusBadge` fields
  - New fields: `BackupContents` (e.g., "DB + Konfig + Adatok"), `Tier1LastRun/LastStatus/DBStatus`, `Tier2Configured/Method/MethodLabel/Dest/Schedule/LastRun/LastStatus/LastError/StatusBadge/SizeHuman/Browsable`
  - `buildAppBackupRows()` rewritten: destination health now via `s.crossDriveRunner.ValidateDestination()` instead of `system.CheckBackupDestination()`
  - `backups.html`: two tier rows (1. mentés / 2. mentés) replace the old three layer rows (DB / Konfig / Userdata)
  - `style.css`: added `.tier-label`, `.tier-location`, `.tier-contents`, `.tier-size`, `.tier-browsable` classes

  **Fix 3: Cleanup (`router.go`)**
  - `filterSnapshotsByPaths()` and `pathCovers()` deleted (were unused since v0.12.7a)

  **Files modified (6):** `internal/backup/crossdrive.go`, `cmd/controller/main.go`, `internal/web/handlers.go`, `internal/web/templates/backups.html`, `internal/web/templates/style.css`, `internal/api/router.go`

### What was just completed (2026-02-18 session 44)
- **v0.12.7a — Post-deploy fixes:**

  **Fix A: Restore now shows snapshots for all apps (`internal/api/router.go`)**
  - Root cause: `filterSnapshotsByPaths` filtered older snapshots (pre-v0.12.7) by HDD paths. Older snapshots don't contain HDD paths (backup wasn't mandatory yet), so Immich got zero snapshots.
  - Fix: removed HDD path filtering entirely from `backupSnapshots`. All snapshots contain config + DB dumps and are useful for any app. `RestoreApp` extracts whatever paths are available from the chosen snapshot.
  - `filterSnapshotsByPaths` and `pathCovers` functions kept (unused, no compile error).

  **Fix B: Clarified "no cross-drive" warning (`internal/web/handlers.go`, `backups.html`, `style.css`)**
  - Root cause: "Nincs beállítva" / red dot implied no backup at all — misleading since nightly restic now always covers HDD data.
  - `handlers.go`: status `"red"` → `"yellow"`, StatusText → `"Nincs második másolat (csak helyi mentés)"`
  - `backups.html`: added `✓ Helyi mentés auto` badge before the `⚠ Nincs 2. másolat` warning
  - `style.css`: `.layer-auto-ok` class added (green text for the auto badge)

  **Files modified (3):** `internal/api/router.go`, `internal/web/handlers.go`, `internal/web/templates/backups.html`, `internal/web/templates/style.css`

### What was just completed (2026-02-18 session 43)
- **v0.12.7 — Backup Architecture Overhaul (mandatory HDD backup, pre-dump, restore for all apps):**

  **Fix 1: HDD data backup now mandatory (`backup.go`, `appdata.go`, `settings.go`)**
  - `resolveAppBackupPaths()` rewrote to iterate ALL deployed stacks via `ListDeployedStacks()` — no longer reads `GetAppBackupMap()` or checks `Enabled` flag
  - `DiscoverAppData()` signature simplified: dropped `backupPrefs map[string]bool` parameter; `BackupEnabled` is now derived from `HasHDDData` (if app has HDD data, it's always backed up)
  - `RefreshCache()` updated to call new `DiscoverAppData(m.stackProvider, status.DiscoveredDBs)` signature
  - 5 dead settings methods deleted: `IsAppBackupEnabled`, `SetAppBackup`, `GetAppBackupMap`, `SetAppBackupBulk`, `GetAppBackupPrefs` — `AppBackupPrefs.Enabled` field kept in struct for backward-compat JSON loading

  **Fix 2: Cross-drive backup triggers fresh DB dump first (`crossdrive.go`, `backup.go`, `main.go`)**
  - New `DBDumper` interface with `DumpStackDB(ctx, stackName)` in `crossdrive.go`
  - `CrossDriveRunner` gets `dbDumper` field + `SetDBDumper(d DBDumper)` setter
  - `Manager.DumpStackDB()` discovers containers for that stack via `DiscoverDatabases()`, runs `DumpAll()`, persists validation cache — same logic as nightly dump but scoped to one stack
  - `RunAppBackup()` calls `DumpStackDB()` before `ValidateDestination()` — non-fatal on failure (logs warn, proceeds with user data)
  - `main.go` wires `crossDriveRunner.SetDBDumper(backupMgr)` after both are initialized

  **Fix 3: Restore dropdown shows ALL deployed apps (`backups.html`, `restore.go`, `router.go`)**
  - `restore.go` rewritten: no `IsAppBackupEnabled()` check; resolves `GetStackComposePath` + `DBDumpDir` + HDD mounts; always restores config+DB, adds user data if `hasHDD`; logs restore type (`config+DB` vs `full (config+DB+userdata)`)
  - Restore dropdown template: removed `{{if and .HasHDDData .BackupEnabled}}` filter; every app gets an `<option>` with `data-has-hdd` and `data-has-db` attributes
  - New `#restore-type-info` div added between snapshot selector and warnings
  - `onRestoreAppChange()` JS updated: reads `data-has-hdd`/`data-has-db` from selected option, shows Hungarian restore type banner (full / config+DB / config only) with color-coded styling
  - `router.go` `backupSnapshots`: added clarifying comment for non-HDD apps (no filter = all snapshots returned)

  **Fix 4: Honest UI label (`backups.html`)**
  - "Docker kötetek" renamed to "Konfiguráció" — Docker named volumes at `/var/lib/docker/volumes/` are NOT in the restic backup paths; what's actually backed up is compose files + app.yaml + .felhom.yml

  **CSS: `.restore-info` and `.restore-info-partial` classes added to `style.css`**

  **Files modified (9):** `internal/backup/backup.go`, `internal/backup/appdata.go`, `internal/settings/settings.go`, `internal/backup/crossdrive.go`, `internal/backup/restore.go`, `cmd/controller/main.go`, `internal/web/templates/backups.html`, `internal/web/templates/style.css`, `internal/api/router.go`

### What was just completed (2026-02-18 session 42)
- **v0.12.6 — Cross-Drive Backup Rsync Fixes:**

  **Context:** After fixing mount-point validation and system-drive thresholds (v0.12.5), testing revealed two more rsync issues for Immich.

  **Fix 3: Simplified rsync destination path structure (`internal/backup/crossdrive.go` `runRsyncBackup`)**
  - Old logic stripped only the first 2 path segments and kept the rest as a subpath, producing redundant nesting: `backups/rsync/immich/storage/immich/<data>` instead of `backups/rsync/immich/<data>`
  - New logic: if app has a single mount, rsync directly into the stack folder (`backups/rsync/immich/`); if multiple mounts, use each mount's leaf directory name as subfolder
  - Duplicate leaf names disambiguated by appending `_N` index suffix
  - Loop variable changed from `_, srcMount` to `i, srcMount` to support the index-based disambiguation
  - Old nested `storage/immich/` folder will remain orphaned after first run (no data loss; `--delete` only affects the target subtree)

  **Fix 4: Exclude app-internal DB dump files from rsync (`internal/backup/crossdrive.go` `runRsyncBackup`)**
  - Apps like Immich store their own periodic DB dumps in `<data>/backups/*.sql.gz` (~16 MB/day)
  - The controller already handles DB backups via `pg_dump` separately — copying these again via rsync is redundant and wastes space
  - Added `--exclude backups/*.sql.gz`, `--exclude backups/*.sql`, `--exclude backups/*.dump` to rsync command
  - The `backups/` directory itself and non-dump files within it are preserved

  **Files modified (1):** `internal/backup/crossdrive.go`

### What was just completed (2026-02-18 session 41)
- **v0.12.5 — Cross-Drive Backup Validation Fix:**

  **Root cause:** Immich cross-drive backup failed with `destination /mnt/hdd_placeholder is not a mount point` because `ValidateDestination()` hard-blocked non-mount-point destinations. The `/mnt/hdd_placeholder` folder is on the internal SSD (not a separate mount), so the device-ID check returned false.

  **Fix 1: Drive-type-aware space checks in `ValidateDestination` (`internal/backup/crossdrive.go`)**
  - `onSystemDrive` flag replaces the previous boolean-only mount-point check
  - System-drive destinations: require **≥10 GB free** and **<90% usage** to protect OS stability
  - External-drive destinations: require **≥100 MB free** (original threshold)
  - Updated function comment to reflect the new tiered logic

  **Fix 2: Aligned `CheckBackupDestination` UI thresholds for system drives (`internal/system/mounts_linux.go`)**
  - Tier 4 disk checks now branch on `h.SystemDrive` flag (set in Tier 3)
  - System drive: block at <10 GB free OR ≥90% used (matches runner enforcement); Hungarian warning messages
  - External drive: warn at ≥90% used, block at ≥95% used (unchanged)
  - Removed the `&& h.Severity == "ok"` guard that prevented system-drive warnings from being overridden properly

  **Files modified (2):** `internal/backup/crossdrive.go`, `internal/system/mounts_linux.go`

### What was just completed (2026-02-18 session 40)
- **v0.12.4 — Correctness & Robustness Bug Fixes (TASK.md — 15 bugs fixed):**

  **CRITICAL fixes (data loss, panics):**
  - **C1: `SetAppBackupBulk` data loss + nil map panic** — Fixed: now updates map IN PLACE instead of replacing it, so stacks absent from the input are preserved. Added nil guard for `s.AppBackup`. (`internal/settings/settings.go`)
  - **C2: `UpdateStackConfig` nil Env map panic** — Added nil check `if appCfg.Env == nil { appCfg.Env = make(...) }` before the field assignment loop. (`internal/stacks/deploy.go`)
  - **C3: `ValidateDump` missing scanner.Err() check** — Added `if err := scanner.Err()` check after the scan loop so I/O errors don't silently mark a partial dump as valid. (`internal/backup/dbdump.go`)

  **HIGH fixes (logic errors, resource leaks):**
  - **H1: `nextDailyRun` DST bug** — Replaced `next.Add(24 * time.Hour)` with `time.Date(day+1, ...)` for correct scheduling across Europe/Budapest DST transitions. (`internal/scheduler/scheduler.go`)
  - **H2: `nextDailyRun` repeated `LoadLocation`** — Cached timezone in package-level `sync.Once` variable; `getBudapestLocation()` now loaded only once. (`internal/scheduler/scheduler.go`)
  - **H3: `settings.save()` .tmp file leak** — Added `os.Remove(tmpPath)` cleanup on `WriteFile` failure path. (`internal/settings/settings.go`)
  - **H4: `SetNotificationPrefs` nil pointer panic** — Added nil guard at start of function, returns error instead of panicking. (`internal/settings/settings.go`)
  - **H5: `appDirSize` ignores `Sscanf` return value** — Now checks `n != 1` and returns `(0, "?")` on parse failure. Same fix applied to `getDirSizeBytes` in `stacks/delete.go`. (`internal/backup/appdata.go`, `internal/stacks/delete.go`)
  - **H6: `getDirSizeBytes` no timeout** — Added `exec.CommandContext` with 30s timeout. Added `"context"` import. (`internal/stacks/delete.go`)
  - **H7: `dbdump.go` tmpFile not using `defer Close`** — Replaced explicit `tmpFile.Close()` call with `defer tmpFile.Close()` so the file handle is released even on panic. (`internal/backup/dbdump.go`)
  - **H8: `UpdateCrossDriveStatus` misleading comment** — Updated comment to accurately describe the "does nothing if nil" behavior instead of claiming it "creates one if nil". (`internal/settings/settings.go`)

  **MEDIUM fixes (code quality, edge cases):**
  - **M1: Custom `contains`/`containsBytes` replaced** — Removed bespoke `containsBytes` and simplified `contains` to delegate to `strings.Contains`. Added `"strings"` import. (`internal/notify/notifier.go`)
  - **M2: `scheduler.Every()` doesn't validate interval** — Added early return with error log if `interval <= 0` to prevent panic in `time.NewTicker`. (`internal/scheduler/scheduler.go`)
  - **M3: `executeJob` panic recovery missing `LastRun`** — Panic recovery defer now also sets `job.LastRun = time.Now()` so the job status shows a timestamp after a panic. (`internal/scheduler/scheduler.go`)
  - **M4: `logPostStartStatus` goroutine captures env by reference** — Copies the env slice before launching the goroutine (`envCopy`). (`internal/stacks/manager.go`)
  - **M5: Multiple `time.LoadLocation` calls in web package** — Added package-level `getTimezone()` with `sync.Once` in `funcmap.go`. Replaced all `time.LoadLocation("Europe/Budapest")` calls in the web package with `getTimezone()`. (`internal/web/funcmap.go`, `internal/web/handlers.go`)

  **Files modified (8):** `internal/settings/settings.go`, `internal/stacks/deploy.go`, `internal/backup/dbdump.go`, `internal/scheduler/scheduler.go`, `internal/backup/appdata.go`, `internal/stacks/delete.go`, `internal/stacks/manager.go`, `internal/notify/notifier.go`, `internal/web/funcmap.go`, `internal/web/handlers.go`

### What was just completed (2026-02-17 session 39)
- **v0.12.3 — Security & Correctness Bug Fixes (TASK.md — 33 bugs fixed):**

  **CRITICAL fixes (data races, security vulnerabilities):**
  - **C1: Data race in RefreshCache** — Moved `m.lastDBDump.Results` mutation inside `m.mu.Lock()`. Was previously mutating shared state without the lock, causing potential torn writes visible to `GetFullStatus()` goroutines. (`internal/backup/backup.go`)
  - **C2: SnapshotHistory reversed after unlock** — Moved snapshot reversal loop before `m.cachedStatus = status` (inside the lock). Previously reversed after `Unlock()`, so `m.cachedStatus.SnapshotHistory` was reversed without protection. (`internal/backup/backup.go`)
  - **C3: SetStackProvider write without lock** — `m.stackProvider = provider` now wrapped in `m.mu.Lock()`. Read by `resolveAppBackupPaths()` concurrently. (`internal/backup/backup.go`)
  - **C4: GetFullStatus shallow-copies mutable pointers** — `LastDBDump` and `LastBackup` are now deep-copied (struct + Results slice) so callers cannot mutate shared manager state. (`internal/backup/backup.go`)
  - **C5: IsSystemDisk 8-bit major mask** — Replaced `>> 8 & 0xff` with `unix.Major()`/`unix.Minor()` (12-bit extraction). Also compares disk-portion of minor (groups of 16) to correctly distinguish physical disks of the same type. Adds `golang.org/x/sys/unix` import. (`internal/storage/safety_linux.go`)
  - **C6: No /dev/ prefix validation on DevicePath** — `FormatAndMount` now validates `DevicePath` starts with `/dev/` and does not contain `..` before any disk operations. (`internal/storage/format_linux.go`)
  - **C7: Path traversal in extractName** — `extractName()` now rejects empty string, `.`, `..`, and names containing `/` or `\`. (`internal/api/router.go`)
  - **C8: Path traversal in TargetPath** — Migration API validates `TargetPath` against registered storage paths from settings before starting migration job. (`internal/web/storage_handlers.go`)
  - **C9: Path traversal in DestinationPath** — Cross-drive backup config API validates `DestinationPath` against registered storage paths when `enabled=true`. (`internal/api/router.go`)
  - **C10: Path traversal in ParseComposeHDDMounts** — `filepath.Clean()` applied before prefix check; uses separator-aware check `cleanHDD + string(filepath.Separator)` to prevent `${HDD_PATH}/../../etc/passwd` escaping. (`internal/stacks/delete.go`)

  **HIGH fixes (logic errors, resource leaks):**
  - **H1: ValidateDump reads entire file into memory** — Replaced `os.ReadFile` with `bufio.Scanner` reading line-by-line. 256KB per-line buffer prevents OOM on large (500MB+) SQL dumps during 5-min cache refresh. (`internal/backup/dbdump.go`)
  - **H2/H3: Double du invocation per mount + no timeout** — Replaced `appDirSizeHuman()`+`appDirSizeBytes()` with single `appDirSize()` function using `exec.CommandContext` with 30s timeout. Halves subprocess calls per mount point. (`internal/backup/appdata.go`)
  - **H4: Snapshot validation only checks first 100** — Replaced `ListSnapshots(100)` existence check with regex validation (`^[0-9a-f]{8,64}$`). Allows restoring any snapshot; `restic restore` returns a clear error for non-existent IDs. (`internal/backup/restore.go`)
  - **H5: No pruning for cross-drive restic repos** — Added `pruneResticRepo()` called after each successful cross-drive restic backup (`forget --keep-daily 7 --keep-weekly 4 --prune`). Non-fatal — logs warning on failure. (`internal/backup/crossdrive.go`)
  - **H6: Temp password file management** — Reorganized temp file lifecycle: close before deferred remove, remove-on-write-error cleanup. (`internal/backup/crossdrive.go`)
  - **H7: dirSizeBytes swallows walk errors** — `filepath.Walk` callback now returns errors instead of `nil`, propagating permission/IO issues. (`internal/backup/crossdrive.go`)
  - **H8: Non-atomic fstab write** — `AppendFstabEntry` now reads existing fstab, writes to `.tmp`, then atomically renames. Crash-safe. (`internal/storage/safety_linux.go`)
  - **H9: IsDeviceMounted naive prefix matching** — After prefix check, next character must be digit (`0-9`) or `p` (partition marker). Prevents `/dev/sdb` matching `/dev/sdba`. (`internal/storage/safety_linux.go`)
  - **H10: eMMC device mapping bug** — `partitionToParentDisk` now handles `mmcblk0p1 → mmcblk0` and `nvme0n1p1 → nvme0n1` patterns. Uses `LastIndex("p")` with digit-suffix check before falling back to `TrimRight("0-9")`. (`internal/storage/scan_linux.go`)
  - **H11: Data race on bytesCopied in rsync error path** — Error return path in `runRsync` now reads `bytesCopied` under mutex lock. (`internal/storage/migrate.go`)
  - **H13: Path prefix match without separator** — Migration source path check now uses `srcPath == req.CurrentHDDPath || strings.HasPrefix(srcPath, req.CurrentHDDPath+"/")`. Prevents `/mnt/hdd` matching `/mnt/hdd_backup/data`. (`internal/storage/migrate.go`)
  - **H14: DeleteStack continues after failed compose down** — `docker compose down` failure now returns an error immediately, preventing deletion of files while containers are still running. (`internal/stacks/delete.go`)
  - **H16: exec.Command("docker") without timeout** — `syncFileBrowserMounts()` now uses `exec.CommandContext` with 60s timeout. (`internal/web/handlers.go`)
  - **H17: SetNotificationPrefs stores caller's pointer** — Deep-copies `NotificationPrefs` struct and `EnabledEvents` slice before storing. (`internal/settings/settings.go`)
  - **H18: wipefs error silently discarded** — wipefs failure logged as warning via progress channel; continues (wipefs may not be installed). (`internal/storage/format_linux.go`)
  - **H19: Orphaned fstab entry on mount failure** — New `RemoveFstabEntry()` function atomically removes UUID entry. Called as rollback on `mount` failure and `findmnt` verify failure. (`internal/storage/safety_linux.go`, `format_linux.go`)

  **MEDIUM fixes (edge cases, code quality):**
  - **M1: formatBytes duplicate in dbdump.go** — Removed `formatBytes()` from `dbdump.go`; all callers (backup.go, restic.go, dbdump.go) now use `humanizeBytes()` from appdata.go. (`internal/backup/dbdump.go`, `backup.go`, `restic.go`)
  - **M2: Dead code .tmp suffix check** — Reordered filter in `ListDumpFiles`: `.tmp` check now comes before `.sql` check to correctly skip `.sql.tmp` temp files (was unreachable before). (`internal/backup/dbdump.go`)
  - **M3: sizeBytes() returns 0 for string types** — Added `case string:` to `sizeBytes()` using `strconv.ParseUint`. (`internal/storage/scan_linux.go`)
  - **M6: Dead elapsed variable** — Removed `_ = elapsed`; elapsed time now shown inline in the "done" progress message. (`internal/storage/migrate.go`)
  - **M7: time.LoadLocation error silently discarded** — Two locations in handlers.go now handle `LoadLocation` error, falling back to `time.UTC`. (`internal/web/handlers.go`)
  - **M10: filterSnapshotsByPaths imprecise prefix** — Added `pathCovers()` helper using separator-aware prefix check. Prevents `/mnt/hdd_1` matching `/mnt/hdd_10/data`. (`internal/api/router.go`)
  - **M11: XSS in editStorageLabel innerHTML** — `cancelEditLabel()` in settings.html now uses DOM manipulation (`document.createElement`, `.textContent`) instead of `innerHTML` for the label text. (`internal/web/templates/settings.html`)

  **Files modified (15):** `internal/backup/backup.go`, `internal/backup/appdata.go`, `internal/backup/dbdump.go`, `internal/backup/restore.go`, `internal/backup/crossdrive.go`, `internal/backup/restic.go`, `internal/storage/safety_linux.go`, `internal/storage/format_linux.go`, `internal/storage/scan_linux.go`, `internal/storage/migrate.go`, `internal/stacks/delete.go`, `internal/api/router.go`, `internal/web/handlers.go`, `internal/web/storage_handlers.go`, `internal/settings/settings.go`, `internal/web/templates/settings.html`

### What was just completed (2026-02-17 session 38)
- **v0.12.2 — Restore Section Simplification (Bug 4 from v0.12.1 TASK.md):**
  - **Feature: Snapshot filtering by app** — `GET /api/backup/snapshots?stack={name}` now filters snapshots to those whose `Paths` overlap with the app's HDD mount paths. Uses prefix matching (snapshot path is prefix of required, or vice versa). New `filterSnapshotsByPaths()` helper in `internal/api/router.go`. Manager gains `GetStackHDDMounts()` method to expose stackProvider's mount resolution.
  - **Feature: Auto-stop/restart on restore** — `RestoreApp()` now stops the app's containers before running `restic restore` and restarts them after (even on failure). Avoids data corruption from live writes during restore. Eliminates the "Javasoljuk az alkalmazás leállítását" advisory from the UI.
  - **Interface extension: StackDataProvider** — Added `StopStack(name string) error` and `StartStack(name string) error` to the `backup.StackDataProvider` interface in `internal/backup/appdata.go`. `stackAdapter` in `cmd/controller/main.go` wires these through to `stacks.Manager`.
  - **UI simplification: Restore section** — Removed confusing "Visszaállítandó útvonalak" path list (technical detail not needed by customer). Snapshot dropdown now populated per-app (filtered) with human-friendly format: `2026-02-17 hétfő 03:00 (a3f2b1)`. Single calm warning replacing the triple-exclamation block. Empty filtered result shows inline message instead of empty dropdown. `data-paths` attribute removed from app dropdown options.
  - **Files modified (6):** `internal/backup/appdata.go`, `internal/backup/backup.go`, `internal/backup/restore.go`, `internal/api/router.go`, `internal/web/templates/backups.html`, `cmd/controller/main.go`

### What was just completed (2026-02-17 session 37)
- **v0.12.0 — Backup Page Overhaul — Unified App Backup Status & Bug Fixes:**
  - **Bug Fix 1: Duplicate unconfigured apps** — `GetFullStatus()` now returns a deep copy of the cached status. `CrossDriveSummary`, `UnconfiguredApps`, and `CrossDriveWarnings` slices are always nil in the returned copy so the handler builds them fresh on every page load. Previously the handler appended to the cached slices, causing 3× duplication on 3 page loads.
  - **Bug Fix 2: Misleading "drive disconnected" error** — Replaced the binary `IsMountPoint || !IsWritable` check with tiered `CheckBackupDestination()` validation (new in `internal/system/mounts_linux.go` and stub in `mounts_other.go`). Tiers: path doesn't exist (critical/blocked), not writable (critical/blocked), same block device as `/` (warning/allowed with note about system drive), disk >95% full (critical/blocked), disk >90% (warning/allowed). `isSameBlockDevice()` replaces `IsMountPoint()` for source/dest same-device detection. Used in both `deployHandler()` and `backupsHandler()` for display, and in `crossdrive.go` logic via `CheckBackupDestination()`.
  - **Bug Fix 3: Dead BackupEnabled toggle** — Removed `settingsAppBackupHandler()` from handlers.go and its `POST /settings/app-backup` route from server.go. The toggle wrote to settings.json but nothing read it to skip apps. UI nightly backup section in deploy.html now shows an informational note instead of the toggle.
  - **Architecture: Unified per-app backup rows** — New `AppBackupRow` struct and `buildAppBackupRows()` in handlers.go. Replaces old "Alkalmazás adatok" + "Másolatok másik meghajtóra" sections with a single expandable row per app showing all 3 backup layers (DB, Docker volumes, user data). Status dot: green=fully covered, yellow=warning (failed run, system drive, disk full), red=HDD data without cross-drive configured, auto=no user data. Expandable JS toggle with ▶/▼ icon.
  - **Architecture: Sequential backup chaining** — Removed independent `cross-drive-daily` (03:30) and `cross-drive-weekly` (04:30) scheduler jobs. Cross-drive backups now run immediately after the restic backup completes (daily jobs every night; weekly jobs on Sunday). This ensures DB dump → restic → cross-drive happen in the same window for file/DB consistency on restore.
  - **Architecture: Deploy page schedule dropdown** — Removed "Csak kézi indítás" option (schedule="manual"). Two options remain: "Naponta (az éjszakai mentés után)" and "Hetente, vasárnap (az éjszakai mentés után)". Weekly option shows informational note about DB consistency implications. Existing "manual" configs treated as "weekly" in the dropdown.
  - **CSS added:** `.app-backup-row`, `.app-backup-row-header`, `.app-backup-row-name`, `.app-backup-row-meta`, `.app-backup-row-detail`, `.status-dot` (green/yellow/red/auto), `.backup-layers`, `.backup-layer-row`, `.layer-label`, `.layer-badge`, `.layer-na`, `.layer-method`, `.layer-dest`, `.layer-schedule`, `.layer-last`, `.layer-unconfigured`, `.layer-actions`, `.layer-warnings`, `.backup-layer-warning`, `.btn-xs`, `.text-ok`, `.text-error`.
  - **Files modified (9):** `internal/backup/backup.go`, `internal/system/mounts_linux.go`, `internal/system/mounts_other.go`, `internal/web/handlers.go`, `internal/web/server.go`, `internal/web/templates/backups.html`, `internal/web/templates/deploy.html`, `internal/web/templates/style.css`, `cmd/controller/main.go`

### What was just completed (2026-02-17 session 36)
- **v0.11.9 — UI Polish Fixes for deploy/settings backup section:**
  - **Fix 1: Spacing** — `.deploy-cross-drive` `margin-bottom` increased from `1rem` to `1.5rem` for consistent spacing before deploy form.
  - **Fix 2: Tooltip on "Módszer"** — Renamed "Verziózott mentés (restic)" to "Titkosított mentés (restic)". Added info `(i)` tooltip explaining rsync vs restic tradeoffs.
  - **Fix 3: Nightly backup indicator** — Replaced disabled checkbox (with confusing pointer cursor) with a non-interactive green/gray dot indicator.
  - **Fix 4: Progressive disclosure** — Dest/method/schedule selects are disabled until "Engedélyezve" is checked. JS `toggleCrossDriveFields()` enables/disables them. Backend handler updated to preserve existing config when disabling (disabled fields not submitted).
  - **Fix 5: Emoji cleanup** — Removed all emoji from `deploy.html` backup section (h4, warning, status, hint, stale data) and `backups.html` cross-drive summary (status badges, schedule badge, unconfigured warning). JS callbacks also cleaned up.
  - **CSS added:** `.info-tooltip`, `.info-icon`, `.info-tooltip-text`, `.cross-drive-nightly-status`, `.nightly-status-indicator`, `.nightly-enabled`, `.nightly-disabled`, `.meta-badge-fail`.
  - **Files modified (4):** `web/templates/deploy.html`, `web/templates/backups.html`, `web/templates/style.css`, `web/handlers.go`

### What was just completed (2026-02-17 session 35)
- **v0.11.8 — Per-App Cross-Drive Backup (3-2-1 rule, second copy on different media):**
  - **Feature: CrossDriveBackup data model** — `AppBackupPrefs` extended with `CrossDrive *CrossDriveBackup` field in `settings.go`. New methods: `GetCrossDriveConfig`, `SetCrossDriveConfig`, `UpdateCrossDriveStatus`, `GetAllCrossDriveConfigs`, `GetOrCreateCrossDrivePassword`. Existing `SetAppBackup`/`SetAppBackupBulk` now preserve cross-drive config. Auto-generated restic password stored in `settings.json`.
  - **Feature: CrossDriveRunner** — New `internal/backup/crossdrive.go`. Supports rsync (simple mirror with `--delete`) and restic (versioned, deduplicated, shared repo). Safety guards: destination ≠ source, mount point check, writable check, per-app concurrency lock. `RunAllScheduled(ctx, schedule)` iterates all apps matching the given schedule. Status (last_run, last_status, last_error, last_duration, last_size_human) persisted to settings.json after each run.
  - **Feature: Scheduler jobs** — Two new daily jobs: `cross-drive-daily` at 03:30 (for apps with `schedule: daily`), `cross-drive-weekly` at 04:30 Sundays only (for `schedule: weekly`).
  - **Feature: API endpoints** — 4 new routes: `POST /api/stacks/{name}/cross-backup`, `POST /api/stacks/{name}/cross-backup/run`, `GET /api/stacks/{name}/cross-backup/status`, `POST /api/backup/cross-drive/run-all`.
  - **Feature: Deploy/Settings page UI** — New "Biztonsági mentés" card on the deploy page for apps with HDD data. Shows nightly backup toggle (read-only link), cross-drive dropdowns (destination, method, schedule), last run status, manual trigger button. States: no other storage (info message), configured, destination unreachable (warning). Flash messages on save redirect.
  - **Feature: Backup page summary** — New "Másolatok másik meghajtóra" section showing all configured apps with method, destination, last status, size. Warns about unconfigured apps with HDD data. Destination health warnings. "Összes futtatása most" button.
  - **CSS:** `margin-bottom: 1.5rem` added to `.deploy-stale-data`. New styles: `.deploy-cross-drive`, `.cross-drive-list`, `.cross-drive-item`, `.cross-drive-header`, `.cross-drive-meta`, `.cross-drive-actions`.
  - **Files modified (10):** `settings/settings.go`, `backup/crossdrive.go` (new), `backup/backup.go`, `api/router.go`, `web/handlers.go`, `web/server.go`, `web/templates/deploy.html`, `web/templates/backups.html`, `web/templates/style.css`, `cmd/controller/main.go`

### What was just completed (2026-02-17 session 34)
- **v0.11.7 — Stale Data Cleanup + FileBrowser Sync + UI Title Fix:**
  - **Feature: Stale data cleanup** — After app data migration, the deploy/settings page now shows leftover data on previous storage paths with size info and a delete button. Two-step confirmation required before deletion. Protected paths (storage root, media, Dokumentumok, appdata) cannot be deleted. Also available immediately after migration on the migration-done page.
  - **Fix: FileBrowser sync after migration** — `syncFileBrowserMounts()` now called after successful data migration, ensuring FileBrowser mounts reflect the current storage layout.
  - **Fix: Deploy page title** — Already-deployed apps now show "Beállítások" (Settings) instead of "Telepítés" (Deploy) in both the browser page title and the `<h2>` heading.
  - **Internal: Exported `ProtectedHDDPaths()`** from stacks package for reuse in web handlers.
  - **Files modified (7):** `internal/stacks/delete.go`, `internal/web/handlers.go`, `internal/web/storage_handlers.go`, `internal/web/templates/deploy.html`, `internal/web/templates/migrate.html`, `internal/web/templates/style.css`

### What was just completed (2026-02-17 session 33)
- **v0.11.6 — FileBrowser Auto-Mount Sync + UI Polish (3 fixes):**
  - **Feature: FileBrowser auto-mount sync** — Added `syncFileBrowserMounts()` and `generateFileBrowserCompose()` to `handlers.go`. After a storage path is added (via storage init wizard) or removed, the controller regenerates `/opt/docker/stacks/filebrowser/docker-compose.yml` with volume mounts for all registered paths (`/mnt/hdd_1:/srv/hdd_1` etc.), then recreates the FileBrowser container. Domain is read from FileBrowser's `.env`. If FileBrowser isn't deployed, the function silently returns. The generated compose is self-contained (no env vars).
  - **UI Fix 1: Badge color fix** — `settings.html`: changed "Nincs csatolva!" (red `state-red`) badge to "Rendszermeghajtón" (yellow `badge-warn`). The path is on the system SSD, which isn't an error — just informational. Added `.badge-warn { background: rgba(250, 204, 21, 0.15); color: #facc15; }` to `style.css`.
  - **UI Fix 2: Progress bar fix** — `storage_init.html`: replaced the disk-usage gradient progress bar (green→yellow→red zones, alarming at 30%) with a clean single-color `progress-bar-task` bar. Added `.progress-bar-task` and `.progress-bar-task .progress-fill` CSS classes to `style.css`.
  - **UI Fix 3: Button text fix** — `settings.html`: "Alapértelmezett" button (reads as status, confusing) → "Legyen alapértelmezett" (clear action verb).
  - **Files modified (5):** `web/handlers.go`, `web/storage_handlers.go`, `web/templates/settings.html`, `web/templates/storage_init.html`, `web/templates/style.css`

### What was just completed (2026-02-17 session 32)
- **v0.11.4 — Bugfix: Storage Initialization (FormatAndMount) — 3 bugs + 4 safety improvements:**
  - **Bug 1 (sfdisk):** Added `wipefs -a` before sfdisk; changed sfdisk input from `,,,L` (unsupported GPT type shorthand) to `,,` (default Linux GUID); added `--force --wipe always` flags. Previous table confusing sfdisk and `L` type not accepted for GPT.
  - **Bug 2 (mount):** Replaced `mount mountPath` (fstab lookup — uses container's /etc/fstab, not host's) with explicit `mount -t ext4 -o defaults,noatime /host-dev/sdb1 /mnt/hdd_1`. fstab entry still written to `/host-fstab` for host reboot persistence.
  - **Bug 3 (mount propagation):** Changed `/mnt` volume in compose to long-form bind with `propagation: rshared`. Also ran `mount --bind /mnt /mnt && mount --make-rshared /mnt` on demo host. Confirmed `Propagation=rshared` in `docker inspect`. Mounts created inside container now propagate to host.
  - **Safety 1 (post-mount verification):** Added `findmnt` check after mount — fails with clear error if mount isn't actually visible.
  - **Safety 2 (ASCII label):** Use `req.MountName` (always ASCII) for ext4 `-L` label (16-byte limit). Display label (`req.Label`, may contain UTF-8 Hungarian chars) stays only in settings.json.
  - **Safety 3 (smart partition):** In `storageInitAPIHandler`, if disk has exactly 1 empty partition (no filesystem), skip wipefs+sfdisk entirely and format existing partition directly. Handles demo sdb case (sdb1 exists, no FS).
  - **Safety 4 (progress messages):** Updated `send()` calls to include command details (device paths, flags) for remote debugging via UI progress panel.
  - **Files modified (3):** `storage/format_linux.go`, `docker-compose.yml`, `web/storage_handlers.go`

### What was just completed (2026-02-17 session 31)
- **v0.11.3 — Bugfix: Missing sfdisk in container (fdisk package):**
  - `sfdisk` is in the `fdisk` package on Debian bookworm, not `util-linux`. Dockerfile had `util-linux` but not `fdisk`, so `sfdisk` was missing and partitioning failed.
  - Added `fdisk` to Dockerfile's `apt-get install` list. Updated comment to clarify which package provides what.
  - Verified: all six disk tools now present in container (`sfdisk`, `mkfs.ext4`, `blkid`, `mount`, `lsblk`, `partprobe`).
  - **Files modified (1):** `Dockerfile`

### What was just completed (2026-02-17 session 30)
- **v0.11.2 — Bugfix: /dev/sdb not accessible inside container:**
  - **Root cause:** Docker always creates a fresh tmpfs at `/dev` inside containers. Even with `privileged: true`, the bind mount `- /dev:/dev` is silently dropped. Block device nodes like `/dev/sdb` don't exist inside the container.
  - **Fix:** Mount host `/dev` at `/host-dev` instead. With `privileged: true`, the kernel allows I/O to the device nodes regardless of path inside the container.
  - **docker-compose.yml:** Changed `- /dev:/dev` → `- /dev:/host-dev:rw`. Also applied missing `privileged: true`, `/etc/fstab:/host-fstab`, and `/run/udev:/run/udev:ro` to demo node's live compose (never applied after v0.11.0).
  - **safety.go:** Added `HostDevPath = "/host-dev"` constant and `HostDevicePath(devPath) string` helper (`/dev/sdb` → `/host-dev/sdb`).
  - **format_linux.go:** All device operations (os.Stat, sfdisk, partprobe, mkfs.ext4, blkid UUID) use `HostDevicePath()`.
  - **safety_linux.go:** `IsSystemDisk()` stats device via `HostDevicePath()`.
  - **scan_linux.go:** `enrichWithBlkid()` probes each partition individually (`blkid -o value -s TYPE/UUID/LABEL /host-dev/sdXN`) instead of batch `blkid -o export` (which fails when `/dev` is Docker's minimal tmpfs).
  - **Verified:** `/host-dev/sda`, `/host-dev/sdb`, partitions visible; `blkid /host-dev/sdb1` returns correct UUID/fstype/label.
  - **Files modified (5):** `storage/safety.go`, `storage/safety_linux.go`, `storage/format_linux.go`, `storage/scan_linux.go`, `docker-compose.yml`

### What was just completed (2026-02-17 session 29)
- **v0.11.1 — Bugfix: Storage Scan — System Disk Detection & FSType in Container:**
  - **Bug 1 fix: System disk detection** — Replaced mount-point string comparison (`== "/"`, `"/boot"`, `"/boot/efi"`) with host fstab parsing. Inside the container, `lsblk` reports container mount points (e.g. `/opt/docker/felhom-controller/data`), not host mount points. New `getSystemDiskNames()` reads `/host-fstab` (fallback: `/etc/fstab`), finds system entries (`/`, `/boot`, `/boot/efi`, `swap`), resolves `UUID=` entries to device paths via `blkid -U`, and marks parent disks as system. `partitionToParentDisk()` handles both standard (`sda2→sda`) and NVMe (`nvme0n1p2→nvme0n1`) naming.
  - **Bug 2 fix: FSType enrichment** — `lsblk` returns null fstype in containers (udev/blkid cache incomplete). New `enrichWithBlkid()` runs `blkid -o export` after lsblk scan and fills in missing `FSType`, `UUID`, `Label` per partition from direct device probing. Runs on both `AvailableDisks` and `SystemDisks`.
  - **Result:** sda (system SSD) now correctly appears in SystemDisks; sdb (USB HDD) appears in AvailableDisks; partition fstypes (vfat/ext4/swap) correctly shown; sdb1 genuinely shows "(nincs fájlrendszer)".
  - **Files modified (1):** `storage/scan_linux.go`

### 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.
  - **Step 1: Success flash messages** — All 4 storage handlers (add/remove/set-default/toggle-schedulable) now redirect with `?storage_msg=success&storage_detail=...` query params. Settings page displays green "alert-info" flash on success. Consistent with backup page flash pattern.
  - **Step 2: Edit storage path labels** — New `SetStorageLabel()` method in `settings.go`. New `POST /settings/storage/label` route + handler. Inline edit UI with ✏️ button, text input, OK/Cancel. Added `.btn-ghost` CSS class.
  - **Step 3: App details per storage path** — Settings page now shows expandable `<details>` list per storage path with app names, sizes, and links to deploy page. New `StorageAppDetail` struct + `appDetailsForPath()` helper. Added CSS for `.storage-app-details`, `.storage-app-list`, `.storage-app-row`.
  - **Step 4: Storage badge on stacks page** — Deployed app cards show "💾 Label" badge indicating which registered storage path the app uses. `StorageLabels` map built from deployed apps' HDD_PATH → registered storage path label lookup. Added `.meta-badge-storage` CSS.
  - **Step 5: Deploy dropdown enhancements** — Storage path dropdown now shows free space ("234 GB szabad"). `DeployStoragePath` struct wraps `StoragePath` with `FreeHuman`/`FreePercent` from `GetDiskUsage()`. JS `checkStorageSpace()` shows yellow warning when selected storage has <20% free.
  - **Step 6: Filesystem & disk info** — New `FSInfo` struct + `GetFSInfo()` in `mounts_linux.go` using `findmnt` command + `/sys/block/` sysfs reads for disk model. Settings page shows "ext4 · /dev/sdb1 · WD Elements" below disk usage bar. Non-Linux stub returns nil.
  - **Step 7: Backup page storage context** — Added `StorageLabel` field to `AppBackupInfo`. Backup page shows storage label badge per app by matching HDD path prefixes against registered storage paths. Uses existing `.meta-badge-storage` CSS.
  - **Files modified (12):** `healthcheck.go`, `settings.go`, `mounts_linux.go`, `mounts_other.go`, `appdata.go`, `handlers.go`, `server.go`, `settings.html`, `stacks.html`, `deploy.html`, `backups.html`, `style.css`

### What was previously completed (2026-02-17 session 26)
- **v0.9.0 — Phase A: Storage Paths Foundation & Backup Toggle Fix:**
  - **Root cause:** Per-app backup toggles (v0.8.0) didn't appear because `controller.yaml` had no `paths.hdd_path` set → `ParseComposeHDDMounts` returned nil. Even with global hdd_path, apps with different HDD_PATH values wouldn't match.
  - **Core fix: Per-app HDD_PATH resolution** — `stackAdapter.GetStackHDDMounts()` now reads each app's own `HDD_PATH` from its `app.yaml` env section (Priority 1), falling back to all registered storage paths (Priority 2). Removed dependency on global `cfg.Paths.HDDPath`.
  - **Storage paths registry** (`settings.json`) — new `StoragePath` struct with Path, Label, IsDefault, Schedulable, AddedAt. Thread-safe CRUD methods in `settings.go` (Get/Add/Remove/SetDefault/SetSchedulable). Multiple external storage paths supported.
  - **Auto-discovery** — On startup, `discoverHDDPaths()` scans deployed apps' `app.yaml` for `HDD_PATH` values. `AutoDiscoverStoragePaths()` registers discovered paths with inferred labels. Legacy `cfg.Paths.HDDPath` used as fallback.
  - **Mount-point validation** — New `mounts_linux.go` (build-tagged): `IsMountPoint()` via `syscall.Stat_t.Dev` comparison, `IsWritable()`, `PathsOverlap()`, `GetDiskUsage()` via `syscall.Statfs`. Non-Linux stubs in `mounts_other.go`.
  - **Settings page "Adattárolók" section** — Lists registered paths with label, path, disk usage bar, app count, badges (default/active/unmounted). Actions: set default, toggle schedulable, remove (with guards). Expandable "Új adattároló hozzáadása" form with 5-step validation (exists, mount point, writable, no overlap, no duplicate).
  - **Deploy page storage dropdown** — `path` field type renders as `<select>` dropdown of schedulable storage paths. Falls back to text input with warning if no paths registered.
  - **Health check storage monitoring** — `RunHealthCheck()` now accepts `storagePaths` parameter. Checks: path accessible (warning), not a mount point (issue — data writes to SSD!), disk usage ≥95% (issue) / ≥90% (warning).
  - **Controller docker-compose.yml** — Changed HDD mount from `${HDD_PATH:-/mnt/hdd_placeholder}:...:ro` to `/mnt:/mnt:rw` for multi-storage support + restore capability.
  - **Removed unused `hddPath` param** from `DiscoverAppData()` signature in backup/appdata.go.
  - **Files created (2):** `system/mounts_linux.go`, `system/mounts_other.go`
  - **Files modified (11):** `settings.go`, `main.go`, `appdata.go`, `backup.go`, `handlers.go`, `server.go`, `settings.html`, `deploy.html`, `style.css`, `healthcheck.go`, `docker-compose.yml`, `report/builder.go`

### What was previously completed (2026-02-16 session 25)
- **v0.8.0 — Phase 7: Storage Overview, Per-App Backup Toggles & Limited Restore:**
  - **Storage overview on backup page** — new "Tárhely áttekintés" section as first section on backup page showing SSD/HDD progress bars + backup repo stats (repo size, dump file count, snapshot count). Reuses existing `system.GetInfo()` and `RepoStats`.
  - **Restic password visibility** — new "Titkosítási kulcs" section inside the repository card. Masked password field with show/copy buttons (JS toggle). Password synced to hub via periodic report for disaster recovery (`ResticPassword` field added to `BackupReport`).
  - **App data discovery** — new `internal/backup/appdata.go`:
    - `StackDataProvider` interface to avoid circular imports between backup and stacks packages
    - `AppBackupInfo`, `AppDataPath`, `AppDockerVolume` structs
    - `DiscoverAppData()` iterates deployed stacks, discovers HDD bind mounts (via adapter calling `ParseComposeHDDMounts`), Docker named volumes (via `parseComposeNamedVolumes` using YAML parser), and DB dump status
    - Stack adapter in `main.go` implements `StackDataProvider` using `stacks.Manager`
  - **Per-app backup toggles** — new "Alkalmazás adatok" section on backup page:
    - Toggle checkbox per app (only for apps with HDD data)
    - Shows HDD paths with sizes, Docker volume info, DB dump notes
    - `POST /settings/app-backup` handler saves preferences to `settings.json`
    - `AppBackupPrefs` struct + bulk getter/setter in `settings.go`
    - `RefreshCache()` populates `AppDataInfo` via `DiscoverAppData()`
  - **Dynamic backup paths** — `RunBackup()` now includes enabled app HDD data paths:
    - `resolveAppBackupPaths()` reads enabled apps from settings, resolves HDD paths via provider
    - Paths logged at INFO level, included in restic snapshot
    - `BackupPaths` display on backup page includes app data paths
  - **Limited app restore** — new restore section on backup page:
    - `RestoreApp()` in `restore.go`: validates enabled, resolves HDD paths, validates snapshot exists, uses running mutex
    - `RestoreAppData()` on `ResticManager`: runs `restic restore` with `--include` flags for specific paths
    - `POST /backup/restore` web handler with confirmation flow
    - `GET /api/backup/snapshots` JSON endpoint for restore dropdown
    - UI: app/snapshot dropdowns, warning box, confirmation checkbox, JS-driven form submission
  - **Exported `ParseComposeHDDMounts`** from stacks package (was unexported `parseComposeHDDMounts`)
  - **Flash messages** on backup page via query params (success/error redirects from handlers)
  - **CSS**: New styles for storage overview grid, app backup toggles, encryption key field, restore section, flash messages
  - **Files created**: `appdata.go`, `restore.go`
  - **Files modified**: `backup.go`, `restic.go`, `handlers.go`, `server.go`, `backups.html`, `style.css`, `settings.go`, `delete.go`, `router.go`, `types.go`, `builder.go`, `main.go`

### What was previously completed (2026-02-16 session 24)
- **v0.7.2 — Fix Notification Preferences Sync (Controller → Hub):**
  - **Two repos changed** (deploy-felhom-compose + felhom.eu):
  - **Hub: `POST /api/v1/preferences` endpoint** (`hub/internal/api/handler.go`):
    - New route in API handler: same Bearer token auth as /report and /notify
    - Accepts JSON payload: `{customer_id, email, enabled_events}`
    - Calls existing `store.SaveNotificationPrefs()` — no store changes needed
    - Logs preference updates at INFO level
  - **Hub: Notification section on customer detail page** (`hub/internal/web/`, `hub/internal/store/store.go`):
    - New `GetRecentNotifications()` store method returns last N notification_log entries
    - `handleCustomerDetail()` loads NotifPrefs + RecentNotifications
    - `joinStrings` template function added for event list display
    - `customer.html` template: new "Notifications" section showing email, events, and last 10 notification log entries (time, event, status, message)
  - **Controller: `SyncPreferences` method** (`internal/notify/notifier.go`):
    - New `preferencesRequest` struct for JSON payload
    - `SyncPreferences(email, enabledEvents)` — synchronous POST to hub `/api/v1/preferences`
    - `IsEnabled()` getter for checking hub connectivity
    - Hungarian error messages for user-facing feedback
  - **Controller: Sync on settings save** (`internal/web/handlers.go`):
    - `settingsNotificationsHandler` now calls `SyncPreferences` after saving to `settings.json`
    - Three flash message variants: success (synced), warning (local save OK, sync failed), error (save failed)
    - Local save always succeeds even if hub sync fails
  - **Controller: Sync on startup** (`cmd/controller/main.go`):
    - Non-blocking goroutine syncs preferences to hub when controller starts
    - Only runs if hub is enabled and email is configured
    - Handles hub DB rebuild recovery (re-populates preferences after hub redeployment)
  - **Files changed**: hub (3 files: handler.go, store.go, server.go, customer.html), controller (3 files: notifier.go, handlers.go, main.go)
  - **Documentation**: README.md updated (version, notify module, phase checklist), CONTEXT.md updated

### What was previously completed (2026-02-16 session 23)
- **v0.7.1 — Phase 2: Monitoring Warnings, Dashboard Alerts & Notification System:**
  - **Three workstreams across two repos** (deploy-felhom-compose + felhom.eu):
  - **Monitoring page "Távoli monitoring" section** (`monitoring.html`, `handlers.go`):
    - New section between System Overview and System Metrics showing healthcheck ping UUID status
    - 5 rows: Heartbeat, System Health, DB Dump, Backup, Backup Integrity — each shows ✅ configured or ⚠️ missing
    - Banner: green (all configured), yellow (some missing), red (monitoring disabled)
    - `isPingConfigured()` helper checks non-empty AND not "CHANGEME" prefix
  - **Dashboard alert banners** (new `alerts.go`, `layout.html`):
    - `AlertManager` struct with `Refresh()` + `GetAlerts()` — generates alerts from health report, missing pings, backup disabled
    - Alert types: `Alert{ID, Level, Message, Link, LinkText}` — levels: error/warning/info
    - Renders colored banners (red/yellow/blue) after `<main class="content">` on all pages
    - Caps at 5 alerts with "+N more" overflow; monitoring page excludes "pings-missing" (shown in table instead)
    - Refreshed every 5 min via system-health scheduler task + once at startup
  - **Hub notification relay** (felhom.eu repo — `hub/internal/api/handler.go`, `hub/internal/store/store.go`):
    - `POST /api/v1/notify` endpoint: Bearer auth, JSON payload (customer_id, event_type, severity, message, details)
    - New `customer_notifications` table (email, enabled_events JSON) + `notification_log` audit table
    - Resend email integration: direct HTTP POST to `https://api.resend.com/emails`
    - Hungarian email template with event details, timestamp, severity
    - `hub.yaml.example` updated with notifications config section
  - **Controller-side notifier** (new `internal/notify/notifier.go`):
    - `Notifier` struct: fires HTTP POST to hub `/api/v1/notify`, non-blocking (goroutine)
    - Cooldown tracking per event type (default 6h, configurable via UI)
    - Checks notification preferences (email configured + event enabled) before sending
    - `NotifyHealthChange()`: only notifies on status degradation (ok→warn, ok→fail, warn→fail)
    - `NotifyBackupFailed/NotifyDBDumpFailed/NotifyIntegrityFailed` convenience methods
    - `SendTest()` for test email flow
    - Wired into scheduler: system-health task calls `NotifyHealthChange()`, backup tasks call failure notifiers
  - **Notification preferences UI** (`settings.html`, `handlers.go`):
    - New "Értesítések" Section C on Settings page (only shown when hub enabled)
    - Email input, 4 event checkboxes (disk_warning, backup_failed, update_available, security_update)
    - Cooldown hours input (default 6)
    - "Mentés" + "Teszt email küldése" buttons
    - Saved to `settings.json` via `NotificationPrefs` struct (Email, EnabledEvents, CooldownHours)
  - **Settings persistence expanded** (`settings.go`):
    - `NotificationPrefs` struct with Email, EnabledEvents, CooldownHours
    - `DefaultEnabledEvents`: disk_warning, backup_failed, update_available
    - `GetNotificationPrefs()` returns defaults if nil, `SetNotificationPrefs()` saves atomically
  - **Files changed**: 3 new (alerts.go, notifier.go, notify package), ~12 modified across both repos
  - **Deployed:** Controller v0.7.1 to demo-felhom.eu, verified healthy (0 alerts on clean system)

### What was previously completed (2026-02-16 session 22)
- **v0.7.0 — Phase 1: Authentication, Persistence & Settings Page:**
  - **New `internal/settings/settings.go`:** Shared persistence layer via `settings.json` in the data directory. Atomic writes (tmp + rename), thread-safe with `sync.RWMutex`. Stores password hash overrides and DB validation cache. Graceful handling if file doesn't exist.
  - **Auth improvements:**
    - Password resolution priority: `settings.json` → `controller.yaml` → none (open dashboard)
    - Startup logs which source is active: `Auth: using password from settings.json/controller.yaml/no password configured`
    - Session duration extended to 7 days (was 24h)
    - `?next=` redirect after session expiry — returns user to the page they were on
    - Flash messages on login page (green info box, used after password change)
    - Conditional logout link — hidden when auth is disabled (no password configured)
    - `invalidateAllSessions()` method for password change flow
  - **New Settings page (`/settings`):**
    - "Rendszer konfiguráció" section: read-only display of controller.yaml values (customer ID/name/domain, git repo/sync interval, backup enabled/schedule, monitoring, healthchecks URL, hub status, controller version)
    - "Jelszó módosítás" section: form with current password, new password, confirm — validates min 8 chars, match check, bcrypt comparison
    - Password saved to `settings.json`, all sessions invalidated, redirect to login with flash message
    - Only shown if auth is enabled; otherwise shows info message to contact operator
  - **Sidebar update:**
    - "Beállítások" menu item with ⚙ icon pinned to bottom (above version/logout)
    - Version and logout link separated from nav links
    - Logout link conditionally shown only when auth is enabled
  - **DB validation persistence:**
    - After each successful dump, validation results saved to `settings.json` (`db_validations` map keyed by filename)
    - Cached data survives container restarts
    - `DBValidationCache` struct with `validated_at`, `table_count`, `has_header`, `error`
  - **10 files changed** (3 new: settings.go, settings.html; 7 modified: main.go, backup.go, auth.go, handlers.go, server.go, layout.html, login.html, style.css)
  - **Deployed:** Controller v0.7.0 to demo-felhom.eu, verified healthy

### What was previously completed (2026-02-16 session 21)
- **v0.6.3 — Bug fixes from v0.6.2 code scan (4 minor fixes):**
  - **Bug 1:** `--hdd-path` in `docker-setup.sh` now uses `require_arg` validation like all other flags. Previously, `--hdd-path` as the last argument without a value would crash with a cryptic bash error under `set -u` instead of a friendly message.
  - **Bug 2:** `stackAction()` in `layout.html` now receives `event` as an explicit parameter instead of relying on the deprecated implicit `window.event`. All 10 onclick call sites in `dashboard.html` and `stacks.html` updated to pass `event` as first argument.
  - **Bug 3:** Page `<title>` now has an em dash separator: `"Vezérlőpult — Felhom.eu"` instead of `"VezérlőpultFelhom.eu"`.
  - **Bug 4:** `nextPruneLabel()` in `funcmap.go` now returns `"ma"` (Hungarian for "today") on Sunday before 4am, consistent with the `nextRunLabel` function. Previously returned the date in `"2006-01-02"` format.
  - **Deployed:** Controller v0.6.3 to demo-felhom.eu, verified healthy

### What was previously completed (2026-02-16 session 20)
- **Hub Dashboard Bugs + Backup Validation Fix (3 bugs):**
  - **Bug 1&2 (Hub repo, felhom-hub v0.1.2):** Hub timestamp parsing failure — `time.Parse` with single hardcoded format silently failed for formats returned by `modernc.org/sqlite`. Added `parseSQLiteTime()` that tries 6 common formats. Fixed: hub main page showing DOWN despite OK status, and report history timestamps showing 00:00:00.
  - **Bug 3 (Controller repo, v0.6.2):** Backup page showing "Hiba" for all DB validations — zero-value `DumpValidation{}` (never assigned) hit the `{{else}}` branch in template. Three fixes:
    - Template: 4-branch guard (Valid → OK / Error → Hiba / zero-value → "–" with tooltip)
    - Debug logging: Added `[DEBUG]` and `[WARN]` log lines to all `ValidateDump()` code paths
    - Re-validation: `RefreshCache()` now cross-checks `lastDBDump` results against fresh `ListDumpFiles()` validation, healing stale in-memory state
  - **Deployed:** Hub v0.1.2 to k3s, Controller v0.6.2 to demo-felhom
  - **Verified:** Controller logs show `ValidateDump OK` for all 3 databases (immich: 60 tables, paperless: 67 tables, romm: 14 tables)

### What was previously completed (2026-02-16 session 19)
- **v0.6.1 — Code Review Bugfixes (7 fixes):**
  - **Fix 1:** `http.NotFound(w, nil)` → pass actual `*http.Request` in `deployHandler` and `appDetailHandler`
  - **Fix 2:** Dashboard running/stopped counts now computed from the filtered `deployedStacks` set (was counting ALL stacks including non-deployed)
  - **Fix 3:** Session cookie `Secure` flag now dynamic based on `r.TLS != nil || X-Forwarded-Proto == "https"`. `SameSite` changed from `Strict` to `Lax` (Strict breaks Cloudflare Tunnel redirects)
  - **Fix 4:** Removed misleading `subtle.ConstantTimeCompare` from `isValidSession()` (map lookup already leaks timing; comparing token to itself is meaningless). Removed unused `token` field from `session` struct. Removed `crypto/subtle` import.
  - **Fix 5:** Replaced `time.Tick()` (goroutine leak) with proper `time.NewTicker` + `done` channel in `cleanupSessions()`. Added `Close()` method to Server. Added `done chan struct{}` to Server struct.
  - **Fix 6:** Added `http.MaxBytesReader(w, req.Body, 1<<20)` (1MB limit) to `deployStack`, `updateOptionalConfig`, `deleteStack` API handlers via `limitBody()` helper.
  - **Fix 7:** Cached `time.LoadLocation("Europe/Budapest")` once at top of `templateFuncMap()`, removed 5 per-function `LoadLocation` calls (timeAgo, fmtTime, fmtTimeShort, nextRunLabel, nextPruneLabel).
  - **Post-fix verification:** All 4 grep checks pass (0 results for NotFound(w,nil), ConstantTimeCompare, time.Tick(, Secure:.*true). `go vet ./...` clean.
  - **Controller version:** v0.6.1 — deployed and verified on demo-felhom.eu

### What was previously completed (2026-02-16 session 18)
- **v0.6.0 — Healthcheck Implementation + Central Push + Hub Dashboard:**
  - **Part 1 — Healthcheck enhancements (controller-side):**
    - Added `heartbeat` ping — lightweight "I'm alive" signal every 5 min (no logic, just ping)
    - Added `backup_integrity` ping — weekly `restic check` on Sunday 04:00, pings healthchecks with result
    - Added `Heartbeat` and `BackupIntegrity` fields to `PingUUIDsConfig`
    - Added `RunIntegrityCheck()` to backup Manager (calls restic Check(), updates lastCheckTime/lastCheckOK, pings)
    - Updated `controller.yaml.example` with new monitoring ping_uuids
    - Created `monitoring/DEPRECATED.md` for legacy bash monitoring scripts
  - **Part 2 — Central hub reporting (controller-side):**
    - New `internal/report/` package: types.go (Report struct), builder.go (BuildReport), pusher.go (HTTP push)
    - Report builder gathers data from all subsystems: system info (via metrics.GetStaticInfo + system.GetInfo), container stats (via metricsStore.QueryContainerSummary), backup status (via backupMgr.GetFullStatus), health (via monitor.RunHealthCheck), stacks (via stackMgr.GetStacks)
    - Report pusher: POST JSON to hub with Bearer token auth, 3 retries with 5s backoff, never fails caller
    - Added `HubConfig` to config.go (enabled, url, api_key, push_interval)
    - Wired hub reporting into scheduler (configurable interval, default 15m)
    - Hub reporting disabled by default (hub.enabled: false)
  - **Part 3 — Hub service (felhom.eu repo, new `hub/` subfolder):**
    - Full Go service: `cmd/hub/main.go`, `internal/api/handler.go`, `internal/store/store.go`, `internal/web/server.go`
    - SQLite store with WAL mode, auto-migration, denormalized fields for fast queries
    - REST API: POST /api/v1/report (Bearer token auth), GET /api/v1/customers, GET /api/v1/customers/{id}, GET /api/v1/customers/{id}/history
    - Dark theme dashboard (English): multi-customer overview table with status indicators, customer detail page with system/storage/containers/backup/health sections
    - Color coding: green (OK, <30min), yellow (warn or 30-60min), red (fail or >60min)
    - K8s manifest: Deployment + Service + Ingress for hub.felhom.eu in felhom-system namespace
    - Dockerfile, Makefile, hub.yaml.example config
    - 90-day report retention with daily auto-prune
  - **Controller version:** v0.6.0 — deployed and verified on demo-felhom.eu (9 scheduler jobs, all new jobs registered)
  - **Manual steps remaining for Viktor (Part 4 of TASK.md):**
    - Create 5 healthcheck checks on status.felhom.eu (heartbeat, system-health, db-dump, backup, backup-integrity)
    - Update controller.yaml on demo-felhom with real UUIDs
    - Build and deploy felhom-hub to k3s cluster
    - Configure hub.felhom.eu DNS in Cloudflare
    - Enable hub reporting on demo-felhom controller.yaml

### What was previously completed (2026-02-16 session 17)
- **v0.5.4 — Monitoring Page Frontend Fixes (4 bugs, frontend-only):**
  - **Bug 1: Tooltip "Invalid Date"** — `items[0].parsed.x` unreliable across Chart.js versions. Fixed tooltip callback to use `items[0].raw.x` (direct {x,y} data access) with `parsed.x` as fallback.
  - **Bug 2: Charts fill full width regardless of data density** — `setChartXBounds()` setting `min/max` at runtime was ignored because the scale was created without them. Fixed by including `min: now - defaultRangeMs, max: now` in the initial `chartOpts()` options. Now "7 nap" shows full 7-day x-axis with data clustered on the right.
  - **Bug 3: Sysinfo values not consistently right-aligned** — `.sysinfo-grid` used `auto-fill` creating variable-width cells. Fixed to `1fr 1fr` (fixed 2-column). Added `align-items: baseline`, `gap: 1rem`, `white-space: nowrap` on labels, `font-weight: 600` + `word-break: break-word` on values. Removed redundant `<style>` block from monitoring.html (styles now in style.css).
  - **Bug 4: Charts overflow on mobile** — Added `min-width: 0` on `.chart-box` (critical CSS grid fix), `overflow: hidden` + `max-width: 100%` on `.chart-wrap` and `.chart-wrap-bar`, `max-width: 100%` on canvas.
  - **Controller version:** v0.5.4 — deployed and verified on demo-felhom.eu

### What was previously completed (2026-02-16 session 16)
- **v0.5.1 — Monitoring Page Bugfixes:**
  - **Bug 1: Hostname** — `os.Hostname()` returns the container ID inside Docker. Fixed by mounting `/etc/hostname:/host/etc/hostname:ro` and reading it first in `sysinfo.go`. Now shows `demo-felhom`.
  - **Bug 2: Tooltip timestamps** — Chart.js tooltip callback used `items[0].parsed.x` (category index 0,1,2...) instead of `items[0].label` (actual timestamp). Index 0 worked by accident (`0 || label` falls through), but all other points showed 1970-01-01.
  - **Bug 3+4: Default range + empty charts** — Default range was `24h` but new system had only minutes of data. Changed to `1h` default for both system and container detail charts. Moved `active` class to "1 óra" button.
  - **Controller version:** v0.5.1 — deployed and verified on demo-felhom.eu

### What was previously completed (2026-02-16 session 15)
- **v0.5.0 — Backup Bugfixes + Monitoring Page with Metrics Store:**
  - **Task 1: Fixed "Helyi mentés" showing "–" after restart** — `GetFullStatus()` now synthesizes `LastBackup` from `SnapshotHistory` and `LastDBDump` from `DumpFiles` on disk when the in-memory values are nil (e.g., after controller restart). Dashboard handler also updated to use `GetFullStatus()` instead of `GetStatus()` for consistent behavior.
  - **Task 2: Verified backup page caching** — Already implemented in v0.4.7 (`RefreshCache`, scheduler job, `AfterBackup` callback). No changes needed.
  - **Task 3: New Monitoring Page ("Rendszermonitor")** — Full system monitoring subsystem:
    - **SQLite metrics store** (`internal/metrics/store.go`, `types.go`): WAL-mode SQLite via `modernc.org/sqlite` (pure Go, no CGO). Stores system metrics (CPU%, memory, temperature, load) and container metrics (CPU%, memory, net/block I/O) with timestamp. Downsampled queries via bucket-based `GROUP BY` for Chart.js. 30-day auto-prune via daily scheduler job at 04:00.
    - **Metrics collector** (`internal/metrics/collector.go`): Background goroutine collects system + container metrics every 60 seconds. System data from `system.GetInfo()`, container data from `docker stats --no-stream` with tab-separated format parsing.
    - **System info provider** (`internal/metrics/sysinfo.go`, `sysinfo_other.go`): Reads hostname, OS, kernel, CPU model/cores, uptime from `/proc` filesystem. Linux-specific with build-tag fallback for cross-compilation.
    - **REST API endpoints** (4 new routes in `router.go`): `GET /api/metrics/system` (time-series with range presets), `GET /api/metrics/containers/summary` (current stats), `GET /api/metrics/containers/{name}` (per-container time-series), `GET /api/metrics/sysinfo` (static system info).
    - **Monitoring page template** (`monitoring.html`): 5 sections — System Overview (sysinfo via API), System Metrics Charts (4 line charts: CPU, Memory, Temperature, Load in 2×2 grid), Container Resources (2 horizontal bar charts: CPU% and Memory), Per-container Detail (click to expand with historical charts), Storage (server-rendered progress bars). Time range selectors (1h/6h/24h/7d/30d). Auto-refresh every 60s.
    - **Chart.js 4.4.7** embedded locally (offline environments, ~200KB UMD), dark theme configuration matching site design.
    - **CSS**: ~100 lines added for monitoring page (`.monitor-card`, `.charts-grid`, `.chart-box`, `.container-charts-row`, `.storage-bars`, responsive rules).
    - **Wiring**: 4th sidebar nav item "Rendszermonitor", metrics DB path in named volume (`data/metrics.db`), `/etc/os-release:/host/etc/os-release:ro` volume mount in docker-compose.yml, Dockerfile updated to `golang:1.24-bookworm` (required by `modernc.org/sqlite`), `go.mod` upgraded to `go 1.24.0`.
  - **Controller version:** v0.5.0 — deployed and verified on demo-felhom.eu (metrics collecting, 16 containers reporting, sysinfo showing Intel N100 correctly)

### What was previously completed (2026-02-16 session 14)
- **v0.4.7 — Protected Stack Detail Pages + Backup Page Caching:**
  - **Protected stacks clickable** — `data-href` gating changed from `{{if not .Protected}}` to `{{if .Meta.Slug}}` on both `stacks.html` and `dashboard.html`. Protected stacks with `.felhom.yml` (i.e. a slug) are now clickable, linking to `/apps/{slug}`. Stacks without `.felhom.yml` remain non-clickable.
  - **"Részletek" button for protected stacks** — Protected stack action section in `stacks.html` now shows a "Részletek" link when the stack has a slug, next to the restart button.
  - **FileBrowser `.felhom.yml` resources** — Added `resources` section (mem_request: 128M, mem_limit: 256M, pi_compatible: true, needs_hdd: true) to both `install_filebrowser()` in `docker-setup.sh` and manually on the demo node. FileBrowser detail page now shows memory/Pi/HDD badges.
  - **Backup page caching** — `GetFullStatus()` no longer runs expensive subprocess calls (restic stats, docker inspect, disk listing) on every page load. Instead, a new `RefreshCache()` method runs these in the background:
    - Every 5 minutes via `backup-cache` scheduler job
    - After each successful backup via `AfterBackup` callback
    - On startup via a goroutine (non-blocking)
  - `GetFullStatus()` returns the cached `FullBackupStatus` instantly, updating only dynamic fields (running flag, next run times, snapshot history). Falls back to a minimal status if cache hasn't populated yet.
  - **Controller version:** v0.4.7 — deployed and verified on demo-felhom.eu

### What was previously completed (2026-02-16 session 13)
- **v0.4.6 — MariaDB Validation Fix + Dashboard & Protected Stack UX:**
  - **Bugfix: MariaDB dump validation false positive** — MariaDB 11.4+ prepends `/*M!999999\- enable the sandbox mode */` before the dump header comment. `ValidateDump()` now scans the first 10 lines for the expected header pattern instead of just checking line 1. Accepts `-- MariaDB dump`, `-- MySQL dump`, `-- mysqldump` for MariaDB and `-- PostgreSQL database dump` for PostgreSQL.
  - **Dashboard shows deployed apps only** — `dashboardHandler()` filters to deployed + protected stacks only. Non-deployed apps remain on the Alkalmazások page. Section heading changed to "Telepített alkalmazások". `TotalCount` stat card still shows all 52 apps.
  - **Protected stack restart button** — Protected stacks (traefik, cloudflared, felhom-controller, filebrowser) now show an "Újraindítás" restart button when operational, on both dashboard (compact ↻) and Alkalmazások page (full button). "Védett" / "Védett rendszerkomponens" badge still shown.
  - **API protection guard** — Centralized guard in `actionStack()` blocks all actions except `restart` on protected stacks (HTTP 403). Defense-in-depth: `StopStack()` and `DeleteStack()` retain their own guards.
  - **FileBrowser `.felhom.yml`** — `install_filebrowser()` in `docker-setup.sh` now creates `.felhom.yml` with `subdomain: files` metadata, so the controller shows the `files.DOMAIN ↗` URL link. Manually created on demo node.
  - **Controller version:** v0.4.6 — deployed and verified on demo-felhom.eu

### What was previously completed (2026-02-16 session 12)
- **v0.4.5 — Dedicated Backup Page ("Biztonsági mentés"):**
  - **New `/backups` page** with full backup system visibility — 5 sections:
    1. **Status overview cards**: Local backup status (green/gray), remote placeholder (gray), DB count, repo size
    2. **Schedule section**: DB dump/restic/prune schedule with next-run times, last backup time + duration, retention policy, "Mentés most" button
    3. **Database table**: Lists all discovered DBs with type badge (PostgreSQL/MariaDB), dump file size, last dump time, validation (table count), status
    4. **Snapshot history table**: Last 20 snapshots with ID, time, data added, files new/changed
    5. **Repository info card**: Path, size, snapshot count, integrity check status, backed-up paths list, remote copy placeholder
  - **Backend extensions:**
    - `SnapshotRecord` type + ring buffer (20 entries) in Manager for per-snapshot stats
    - `DumpValidation` — scans dump files for CREATE TABLE statements, validates header and file size
    - `ValidateDump()` runs after each successful dump in `DumpOne()`
    - `ListDumpFiles()` scans dump directory for existing `.sql` files (fallback when in-memory results empty)
    - `ListSnapshots()` on ResticManager — returns all snapshots from restic (newest first)
    - `GetFullStatus()` on Manager — single call returns everything the page needs
    - `LoadSnapshotHistory()` populates history from restic on startup (without delta stats)
    - Restic check result tracking (`lastCheckTime`, `lastCheckOK`)
    - `NextDailyRun()` exported from scheduler for next-run time calculation
  - **Server wiring:**
    - `Server` struct now holds `*scheduler.Scheduler`
    - `NewServer()` accepts scheduler parameter
    - `/backups` route + `backupsHandler()` in handlers.go
  - **New template functions** (`funcmap.go`): `timeAgo`, `fmtTime`, `fmtTimeShort`, `dbTypeLabel`, `nextRunLabel`, `pruneLabel`, `nextPruneLabel`, `fmtDuration`, `fmtBytes`, `shortID`
  - **Navigation**: Sidebar now has 3 items (Vezérlőpult, Alkalmazások, Biztonsági mentés)
  - **Dashboard**: Backup card title is now a clickable link to `/backups`
  - **Auto-refresh**: Page polls `/api/backup/status` every 3s during backup-in-progress, reloads when complete
  - **CSS**: Full dark-theme styles for schedule card, database table, snapshot table, repository card, validation badges, DB type badges, empty state
  - **Controller version:** v0.4.5 — deployed and verified on demo-felhom.eu (2 historical snapshots loaded)

### What was previously completed (2026-02-15 session 11)
- **v0.4.1 — App Filtering + Bugfixes:**
  - **Filter bar on Alkalmazások page**: Four pill-shaped filter buttons (Mind/Futó/Leállítva/Telepíthető) with live count badges computed from DOM. Filters stack cards via `display: none`, updates URL with `?filter=running` via `history.replaceState`. Reads filter from URL on page load for deep-linking support.
  - **New `filterCategory` template function** (`funcmap.go`): Maps container state + deployed flag to filter categories (running/stopped/available). Each stack card gets a `data-filter-state` attribute for client-side filtering.
  - **Clickable dashboard stat cards**: Stat cards (Futó/Leállítva/Összes) changed from `<div>` to `<a>` with `href` linking to `/stacks?filter=running`, `/stacks?filter=stopped`, `/stacks` respectively. Hover effect with translateY + box-shadow.
  - **docker-compose.yml synced to demo node**: Fixed the stale compose file that still had `dashboard.${DOMAIN}` Traefik label (from pre-v0.3.0). Now uses correct `felhom.${DOMAIN}` label + `/sys:/host/sys:ro` mount.
  - **Controller version:** v0.4.1 — deployed and verified on demo-felhom.eu
  - **Remaining manual tasks for Viktor (Task 2 & 3 from TASK.md):**
    - Verify `felhom.demo-felhom.eu` resolves correctly (Cloudflare Tunnel public hostname may need updating from `dashboard.*` to `felhom.*`)
    - Update Pi-hole local DNS if applicable
    - Enable backup in `controller.yaml` on demo node (`backup.enabled: true`)
    - Create `/srv/backups` directories on demo node

### What was previously completed (2026-02-15 session 10)
- **v0.4.0 — Monitoring & Health + Backups (Phase 2 & 3):**
  - **Central job scheduler** (`internal/scheduler/scheduler.go`):
    - Replaces ad-hoc goroutines in main.go with a unified scheduler
    - `Every(name, interval, fn)` for periodic jobs, `Daily(name, timeStr, fn)` for scheduled tasks
    - Panic recovery, skip-if-running, quiet mode for high-frequency jobs (≤30s)
    - Daily jobs use `Europe/Budapest` timezone with `time.Timer` for DST correctness
    - Graceful shutdown with 30s timeout for running jobs
  - **CPU usage collector** (`internal/system/cpu_linux.go`):
    - Background goroutine samples `/proc/stat` every 5s, computes delta-based CPU %
    - Platform stubs for non-Linux in `cpu_other.go`
  - **Temperature & load metrics** (`internal/system/info_linux.go`):
    - Reads `/proc/loadavg` for 1/5/15 min load averages
    - Reads thermal zones from `/host/sys/class/thermal/` (Docker mount) with `/sys/` fallback
    - Handles millidegree values, picks highest zone, with hwmon fallback
  - **Healthchecks.io pinger** (`internal/monitor/pinger.go`):
    - HTTP ping client for Healthchecks.io-compatible endpoints
    - POST to `/ping/{uuid}` (success), `/fail` (failure), `/start` (started)
    - 10s timeout, 3 retries with 2s backoff, skips CHANGEME UUIDs
  - **System health checks** (`internal/monitor/healthcheck.go`):
    - Checks disk, memory, CPU, temperature, Docker reachability, protected containers
    - Returns HealthReport with status "ok"/"warn"/"fail" + formatted message for pings
  - **Database dump engine** (`internal/backup/dbdump.go`):
    - Auto-discovers PostgreSQL/MariaDB containers via `docker ps` + `docker inspect`
    - Dumps via `docker exec pg_dump`/`mariadb-dump` with 5min timeout
    - Atomic writes (`.tmp` → `.sql`), empty file detection, stale temp cleanup
  - **Restic integration** (`internal/backup/restic.go`):
    - Auto-generates repository password (32 random bytes, base64url)
    - Init, snapshot (JSON output), prune, check, stats, latest snapshot
    - Stale lock detection with automatic unlock + retry
  - **Backup orchestrator** (`internal/backup/backup.go`):
    - DB dumps + restic snapshots, weekly prune on Sundays
    - Thread-safe running flag, Healthchecks.io pings with results
    - `RunFullBackup()` for manual trigger (sequential: dumps → snapshot)
  - **Wiring updates:**
    - `main.go`: scheduler-based job registration, cpuCollector lifecycle, pinger + backupMgr init
    - `api/router.go`: `GET /api/backup/status`, `POST /api/backup/run`
    - `web/server.go` + `handlers.go`: pass cpuCollector to GetInfo(), backup status on dashboard
    - `funcmap.go`: `tempColor`, `fmtTemp`, `fmtLoad` template functions
  - **Dashboard UI enhancements:**
    - CPU usage bar with load average display below
    - Temperature with colored indicator dot (green/yellow/red at 60°/75°C)
    - Backup status card: last run time, DB count, repo size/snapshots
    - "Mentés most" button triggers manual backup via API
  - **Config updates:**
    - `controller.yaml.example`: added `system_health_interval`, `hdd_path`, `system.reserved_memory_mb`
    - `docker-compose.yml`: added `/sys:/host/sys:ro` mount for temperature reading
    - `restic_password_file` default changed to `data/` subdir (auto-generated in named volume)
- **Controller version:** v0.4.0 — deployed and verified on demo-felhom.eu

### What was previously completed (2026-02-15 session 9)
- **v0.3.0 — Structural refactoring (templates + server split + domain rename):**
  - **Templates: go:embed migration** — moved all 7 HTML templates + CSS from Go string constants to individual files in `internal/web/templates/`. Created `embed.go` with `//go:embed` directive. Template loading now uses `ParseFS()` instead of `Parse()`. CSS served from embed.FS via `ReadFile()`. Zero runtime file dependencies — still compiled into the binary.
  - **Server decomposition** — split monolithic `server.go` (540 lines) into focused files:
    - `auth.go`: session struct, auth middleware, login/logout handlers, session management
    - `handlers.go`: page handlers (dashboard, stacks, logs, deploy, app detail)
    - `funcmap.go`: template FuncMap with 14 custom functions
    - `server.go`: Server struct, NewServer, loadTemplates (3-liner), ServeHTTP routing, render helper, static file serving
  - **Domain rename** — controller subdomain changed from `dashboard.*` to `felhom.*` in Traefik labels and setup script
  - **Documentation updated** — CLAUDE.md, README.md, CONTEXT.md all reflect new file structure
  - **Reminder for Viktor:** Update Cloudflare Tunnel public hostname (`dashboard.demo-felhom.eu` → `felhom.demo-felhom.eu`) and Pi-hole DNS if needed
- **Controller version:** v0.3.0

### What was previously completed (2026-02-15 session 8)
- **FileBrowser as infrastructure service:**
  - Created `scripts/hdd-setup.sh` (adapted from deploy-portainer) — sets up HDD folder structure with `Dokumentumok` user dir
  - Created `scripts/docker-setup.sh` (adapted from deploy-portainer) — installs Docker, Traefik, FileBrowser as infra services
  - Added `filebrowser` to protected stacks in `controller.yaml.example`
  - Removed `templates/filebrowser/` from app-catalog-felhom.eu (no longer a catalog app)
- **Orphan stack detection and deletion:**
  - Added `Orphaned` field to Stack struct + `getCatalogTemplateSlugs()` helper
  - Orphan detection in `ScanStacks()` — deployed stacks with no matching catalog template marked as orphaned
  - New `delete.go`: `DeleteStack()` (compose down + HDD cleanup + dir removal), `GetStackHDDData()`, `parseComposeHDDMounts()`
  - Safety: protected HDD paths (root, media, storage, Dokumentumok, appdata) can never be deleted
  - New API endpoints: `DELETE /api/stacks/{name}` and `GET /api/stacks/{name}/hdd-data`
  - UI: orange "Elavult" badge on orphaned stacks, "Törlés" button, delete confirmation modal
  - Modal shows HDD data paths/sizes, checkbox for "Felhasználói adatok törlése a merevlemezről"
  - Hides "Frissítés" and "Részletek" buttons for orphaned stacks
- **Verified:** 1 orphaned stack detected on startup (filebrowser — now infra, removed from catalog)
- **Controller version:** v0.2.15

### Previously completed (2026-02-14 session 7)
- **Fixed YAML parse error in romm `.felhom.yml`** (app-catalog repo):
  - Root cause: Hungarian opening quote `„` (U+201E) paired with ASCII `"` (0x22) inside YAML double-quoted strings terminated the string prematurely
  - Affected lines: `help_text` for IGDB Client Secret and SteamGridDB API Key fields
  - Fix: escaped inner ASCII double quotes with `\"` in the YAML strings
  - This caused `LoadMetadata()` to silently fail and return empty defaults for ALL romm metadata (tagline, resources, category — everything)
- **Added error logging to `LoadMetadata()`** in `metadata.go`:
  - `[ERROR]` log on YAML parse failure (was silently swallowed — critical bug)
  - Temporary `[DEBUG]` log used for diagnosis, then removed
- **Fixed deploy command in CLAUDE.md**:
  - `sed` pattern now targets only `image:` lines (was matching service name too, breaking YAML)
  - Added `sudo` for both sed and docker compose (directory is root-owned)
- **Controller version:** v0.2.14

### Previously completed (2026-02-14 session 6)
- **Bug fix: App info logo SVG rendering** — `.app-info-logo` CSS in `templates.go`:
  - Added `min-width`, `min-height`, `max-width`, `max-height: 80px` and `overflow: hidden`
  - Prevents SVG images with explicit dimensions or no viewBox from overflowing container
  - Logo now reliably renders at 80x80 regardless of SVG intrinsic size
- **Controller version:** v0.2.12

### Previously completed (2026-02-14 session 5)
- **App detail/info pages** — new feature:
  - New route: `GET /apps/{slug}` renders a full info page (was redirect to deploy page)
  - Hero section with logo, tagline, resource badges
  - Screenshots section (graceful — hidden via `onerror` if assets don't exist)
  - Info cards: use cases, first steps, prerequisites, default credentials, docs link
  - Optional config form with AJAX save (POST `/api/stacks/{name}/optional-config`)
  - New `.felhom.yml` fields: `app_info` (tagline, use_cases, first_steps, prerequisites, default_creds, docs_url) and `optional_config` (groups of env var fields)
  - New structs in `metadata.go`: `AppInfo`, `OptionalConfigGroup`, `OptionalConfigField`
  - `UpdateOptionalConfig` in `deploy.go`: saves optional env vars to `app.yaml`, restarts deployed stacks with `docker compose up -d` to pick up new env vars
  - Navigation updated: stack cards on dashboard/stacks pages now link to `/apps/{slug}`, deploy page has "Részletek" link back to info page
- **RoMM metadata updated** (app-catalog repo):
  - Full `app_info` section: tagline, 5 use cases, 6 first steps, 3 prerequisites, default creds, docs URL
  - 6 optional config fields for metadata providers: IGDB (client_id + secret), SteamGridDB, ScreenScraper (user + password), MobyGames
  - docker-compose.yml updated with SCREENSCRAPER_USER, SCREENSCRAPER_PASSWORD, MOBYGAMES_API_KEY env vars
  - Display name fixed: "ROMM" → "RomM"
- **Controller version:** v0.2.11

### Previously completed (2026-02-14 session 4)
- **Fixed deploy race condition** in `internal/stacks/deploy.go`:
  - In-memory `Deployed` flag now set BEFORE `docker compose up -d` (compose up can take 30-60s for image pulls)
  - On failure: both in-memory state and disk (app.yaml) are reverted
  - Eliminates stale "Telepítés" button during long compose operations
- **Added `checkBeforeDeploy()` JS guard** in `internal/web/templates.go`:
  - Telepítés buttons on Vezérlőpult and Alkalmazások pages now fetch live state from `/api/stacks/{name}` before navigating
  - If app is already deployed (e.g., another tab deployed it), shows alert and reloads page instead of navigating to deploy form
  - Catches stale UI state gracefully

### Previously completed (2026-02-14 session 3)
- **Enhanced debug logging** across all stack operations in `internal/stacks/`:
  - **Operation timing**: All stack ops (start, stop, restart, update, deploy) now log elapsed time
  - **Post-start container state check**: Async goroutine after start/restart/update/deploy
  - **Image pull detection**: Checks local images before deploy/update (debug level)
  - **GetLogs/ScanStacks improvements**: Byte count logging, deployed/available counts
  - All verbose checks gated on `cfg.Logging.Level == "debug"`; timing always at INFO
- **UI improvements** in `internal/web/templates.go` and `server.go`:
  - **Memory bar fix on deploy page**: Bar segments now always visible (min-width: 3px), new app segment uses translucent green with distinct border for clear visual separation from committed memory
  - **Clickable app cards**: Cards on Vezérlőpult and Alkalmazások pages are now clickable (navigates to deploy/detail page). Uses `data-href` attribute + delegated click handler. Protected stacks excluded. Actions area (buttons, state labels) excluded from click-to-navigate
  - **Live-scrolling logs**: Logs page now auto-refreshes every 3s via AJAX polling (`?raw=1` returns plain text). Fixed-height container (70vh) with auto-scroll to bottom. Pulsing green "Élő" indicator. Pause/resume toggle ("Szüneteltetés"/"Folytatás"). User scroll position preserved when scrolled up to read history
  - **Deployment progress UI**: Deploy button no longer shows alert+redirect immediately. Instead shows 3-step progress panel: config saved → containers starting → app initializing. Polls `GET /api/stacks/{name}` every 3s to track actual container health state. Handles running (auto-redirect), starting (keep polling), unhealthy (warning), exited (error), and 120s timeout. Shows elapsed time counter
- **Mealie healthcheck fix** (app-catalog-felhom.eu):
  - `wget --spider` replaced with Python TCP socket check — mealie image doesn't include wget
  - `start_period` increased to 60s (DB migrations take ~40s on first start)
- **Healthcheck audit**: filebrowser (Alpine, has BusyBox wget — OK), stirling-pdf (Ubuntu, has wget — OK)

### Previously completed (2026-02-15 session 2)
- **Phase 4: Git Sync + App Catalog Audit** — major milestone
- **Git sync module** (`internal/sync/sync.go`):
  - Clones/pulls app-catalog-felhom.eu repo to local cache on startup
  - Periodic sync based on `git.sync_interval` (default 15m)
  - Copies `docker-compose.yml` + `.felhom.yml` to stacks dir (never overwrites `app.yaml`/`.env`)
  - SHA-256 content comparison — only writes changed files
  - Triggers `ScanStacks()` after sync so dashboard updates immediately
  - Uses `os/exec` git CLI — no Go git library dependency
- **Manual sync button** ("Sablonok frissítése") on Alkalmazások page:
  - `POST /api/sync` endpoint with 30s debounce
  - Toast notification shows result (success/failure/what changed)
  - Auto-reloads page if new apps or updates detected
- **Sync status** added to `/api/system/info` (last_sync, last_status, syncing flag)
- **.felhom.yml files created for all 10 apps** (paperless-ngx already had one):
  - actualbudget, docmost, filebrowser, homebox, immich, mealie, romm, stirling-pdf, vaultwarden
  - All follow the same format: display_name, description, category, subdomain, resources, deploy_fields
- **Docker Compose templates audited and fixed** for all 10 apps:
  - Fixed `{{DOMAIN}}` → `${DOMAIN}` syntax in homebox, mealie, romm, stirling-pdf
  - Fixed `{{HDD_PATH}}` → `${HDD_PATH}` in romm
  - Added `deploy.resources.limits.memory` to all services across all templates
  - Added `TZ=Europe/Budapest` to all sidecar services (postgres, redis, mariadb)
  - Added healthcheck to romm main service
  - Added `romm-redis` `condition: service_healthy` (was `service_started`)
  - Standardized header comment blocks across all templates
- **Documentation updated**: app-catalog README, CLAUDE.md, CONTEXT.md

### Previously completed (2026-02-15 session 1)
- **Memory validation during deployment**:
  - Pre-deploy memory check: compares `mem_request` sum against usable system RAM
  - Hard block if requests exceed usable memory (total - 384MB reserved)
  - Soft warning if `mem_limit` sum exceeds total RAM (overcommit OK for limits)
  - `ParseMemoryMB()` supports "500M", "1G", "1.5G", "1024" formats
  - `CommittedMemory()` sums requests/limits across all deployed stacks
  - Memory summary bar shown on deploy page before user clicks deploy
  - `system.reserved_memory_mb` configurable in controller.yaml (default: 384)
- **Display: `~` prefix on mem_request** in UI badges (display-only, exact value stored)
- **Felhom.eu logo** replaced text logos in sidebar and login page with actual SVG logo
  - Logo SVG embedded as Go string constant, served at `/static/felhom-logo.svg`

### Previously completed (2026-02-14)
- **System info bar on Vezérlőpult dashboard**: RAM, SSD, and optional HDD usage
  - Progress bars with color coding (green < 70%, yellow 70-85%, red > 85%)
  - New `internal/system` package reads `/proc/meminfo` + `syscall.Statfs`
  - Platform-specific: Linux impl + non-Linux stub (build tags)
  - Hungarian labels: "Memória", "SSD tárhely", "Külső HDD"
- **Docker Compose memory limits** on paperless-ngx template:
  - paperless-webserver: 768M, postgres: 256M, redis: 128M
  - Added `mem_limit` field to `.felhom.yml` ResourceHints (total: 1152M)
- **`/api/system/info` endpoint** now returns live system metrics (was customer info)
- **Config**: Added `paths.hdd_path` for external HDD monitoring
- Controller image builds via build.sh, pushes to Gitea container registry

### Previously completed (2026-02-13)
- Built the entire felhom-controller from scratch (Go, no frameworks)
- Debugged and fixed 7 issues during first real deployment:
  1. Password validation (empty passwords accepted)
  2. In-memory Deployed flag not updating after deploy
  3. Health-aware state parsing (starting/unhealthy detection)
  4. Random card ordering (Go map iteration)
  5. "Részletek" button redirect for deployed apps
  6. Paperless OCR language installation (LANGUAGES vs LANGUAGE env var)
  7. Documentation: restart vs up -d for image updates

### What's next (priorities)
1. **Test per-app backup** — enable backup for Paperless-ngx HDD data, trigger manual backup, verify restic snapshot includes HDD paths
2. **Test restore** — restore app data from snapshot, verify file recovery (now possible with /mnt:rw mount)
3. **Deploy Immich** — tests HDD path + secrets + multi-storage (biggest real-world test)
4. Add `app_info` + `optional_config` to more apps (Immich, Mealie, Vaultwarden)
5. Test on Raspberry Pi (pi-customer-1)
6. Self-update mechanism
7. Hub alerting (webhook to Healthchecks for stale customers)
8. Docker volume backup (mount `/var/lib/docker/volumes:ro` into controller)