v0.279.0: after_install (decision 45), known default logins on the page, Part D empty-backup alarm, night chain (R-705), R-706

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

CHANGELOG.md

@@ -1,3 +1,30 @@
+## v0.279.0 — no app goes live with a login a stranger knows (after_install); an empty backup of a running app is an alarm; the night's chain on a button; R-706 (2026-09-28)
+
+**MinAgent: 0.131.0** (unchanged). Needs hub v0.123.0 (unchanged; Part D rides the existing operator-only
+`backup_run_failures` digest). New strings: `app_info.known_login`, `backups_apps.hollow_local`,
+`backups_apps.hollow_offsite`, `debug.night_chain` (hu + en). Evidence: `felhom.eu/documentation/audits/logins-nvme-2026-09-28/`.
+
+- **`after_install:` (`09` §3 decision 45).** A template may declare ONE command the box runs once in the app's own
+  container after a FRESH install (the deploy-done hook, ok=true) — to replace a known default login with a generated
+  `type: password` field, shown on the app page as the first password. `env:` names the deploy values filled into
+  `${NAME}` (an undeclared or empty one refuses — never an empty password); `success:` is a marker the output must
+  carry (claper's CLI exits 0 on an error). Retried while the app boots (6 × 20 s), recorded in `app.yaml`
+  (`after_install: {at, ok, detail}`), never logged expanded. Never on a restore or a kept-data load (R-694). The
+  deploy-done hook is now set on EVERY box (it was inside `if notifier != nil`, so a box with no hub would never run it).
+- **The page says when a default login is in effect** (`defaultLoginInEffect`): the install dialog before the install
+  when nothing will replace it, the app page while it is in effect ("This app starts with a known, shared password: %s.
+  Change it right after the install."); the default-login card is HIDDEN once after_install replaced it.
+- **Part D — a running app whose newest copy holds no data is an alarm.** At the end of the dump leg (the local unit)
+  and in the off-site loop (the pushed unit): an installed app that RUNS and has volumes, whose copy lists no dump and no
+  tar → the operator digest once per app per tier per day, and a sentence on the backup page until a later check finds
+  data. A held app that is stopped is not flagged. Measured before: yesterday's demo-hp nextcloud had a WARN line only.
+- **R-705 (controller half):** debug action `POST /api/debug/backup/night-chain` — dump → Tier 2 → off-site → update leg,
+  one at a time, refused while a backup/restore op, a guarded update or another chain runs. The update leg gets its
+  normal length from its own start (`RunUpdateLegNow`; by day the night's W+5h has passed).
+- **R-706:** a removal "with its backups" also deletes the app's off-site verification copy.
+- Tests: `TestAfterInstall_*` (stacks + main.go wiring), `TestKnownLogin_*`, `TestPartD_*` (backup + page),
+  `TestR705_*` (web + stacks), `TestR706_*`. Red-proofs RP7–RP15, each seen failing on an assertion.
+
 ## v0.278.0 — a hold left by an earlier install no longer holds the new one (R-704) (2026-09-28)
 
 **MinAgent: 0.131.0** (unchanged). Needs hub v0.123.0 (unchanged). New strings: none. Evidence:

CONTEXT.md

@@ -7,7 +7,12 @@
 >
 > Ask Claude Code: "Please update CONTEXT.md with what we did today"
 
-Last updated: 2026-09-28 (v0.277.0 — kept data loads from the off-site copy too, R-691 (2))
+Last updated: 2026-09-28 evening (v0.279.0 — after_install / known default logins, Part D empty-backup alarm, night chain, R-706)
+
+> **2026-09-28 evening — v0.279.0.** `stacks/after_install.go` (decision 45: a fresh install replaces a known default
+> login; the deploy-done hook now set on every box), `web/known_login.go` (the page's default-login rule),
+> `backup/hollow_watch.go` (Part D: a running app's empty copy → digest + page), `web/night_chain.go` + `RunUpdateLegNow`
+> (R-705), `Router.removeVerificationCopy` (R-706). Also: v0.278.0 (R-704) earlier the same day.
 
 > **2026-09-28 — v0.277.0 (MinAgent 0.131.0).** `backup/kept_load.go`: `KeptBestCopy` (local newest vs off-site —
 > off-site only when NEWER or the only copy), `KeptOffsiteCopies` (ONE `snapshots --json`, 20 s bound; `offsiteNewest`

REUSE.md

@@ -25,6 +25,9 @@
 | `offsiteRestoreRootFor` | controller/internal/backup/offbox_verify_copies.go | `(drivePath string) string` | THE only place `backups/offsite-restore` is spelled | `offboxRestoreScratchDir` builds on it — the listing/delete surface MUST resolve byte-identical paths to what the restore wrote. Do not re-hardcode the segments (they were open-coded in 3 places before v0.147.0) |
 | `ProtectedHDDPaths` | controller/internal/stacks/delete.go | `(hddPath string) map[string]bool` | Never-delete set (root, appdata, backups, media, kept, legacy felhom-data) | Consult before ANY recursive delete under a drive |
 | `stacks.OldAppDataPaths` / `Manager.ListKept` / `KeepAside` / `DeleteKept` / `FindKept` | controller/internal/stacks/kept.go | `(composePath, hdd)` / `(drives)` / … | Kept data (`09` §3 decision 36): what counts as an app's old data (ONLY `<hdd>/appdata/…` binds), the list, start-fresh, the household's delete | **An action names a kept item by path only through `FindKept`** — `DeleteKept` refuses anything not listed. `KeepAside` is a rename on one drive; never copy, never `RemoveAll` in a rollback (`removeEmptyDirs`) |
+| `stacks.RunAfterInstall` / `expandAfterInstall` / `web.defaultLoginInEffect` (v0.279.0, decision 45) | controller/internal/stacks/after_install.go · controller/internal/web/known_login.go | `(name, wait)` / `(cmd, allowed, env)` / `(meta, cfg, installed)` | A fresh install replaces a known default login; the page says when a default is still in effect | **Only from the deploy-done hook** — never after a restore/kept load (R-694). A `success:` marker is required (exit 0 lies). Never log the expanded command |
+| `backup.judgeCopy` / `HollowCopies` / `SetHollowCopyNotify` (Part D, v0.279.0) | controller/internal/backup/hollow_watch.go | `(app, tier, unitDir)` | A RUNNING app whose newest copy holds no data → operator digest once/day + page sentence | Uses `unitCarriesData` (the manifest, never size); a stopped held app is never flagged |
+| `web.nightChain` (R-705, v0.279.0) | controller/internal/web/night_chain.go | `POST /api/debug/backup/night-chain` | The night's four legs now, in order | Refuses while any op/update/chain runs; the leg uses `RunUpdateLegNow` |
 | `Router.dropLeftoverHold` + `settings.ClearUpdateHold` (R-704, v0.278.0) | controller/internal/api/router.go · controller/internal/settings/settings.go | `(name, why)` / `(stack) (bool, error)` | A new install (plain or "use my kept data") and a removal clear the update / crash-loop hold of the app's install | **A hold belongs to an INSTALL; the name is all the next install shares with it.** Never clears an R-379 restore hold (operator-only) |
 | `backup.KeptBestCopy` / `KeptDBCopy` / `KeptOffsiteCopies` / `KeptCopyAt` / `LoadKeptApp` / `LoadKeptOffsite` / `KeptCopyKey` | controller/internal/backup/kept_load.go | `(ctx, app, drive)` / `(app, drive)` / `(ctx, apps)` / `(unitDir, drive, tier)` / … | Which copy can load kept files (local tiers + since v0.277.0 the off-site copy, R-691 (2)), the load as a restore op, the copy's name for the page | A copy counts only with data (DB dump or volume tar) AND its app.yaml `HDD_PATH` = this drive. Installed apps are never offered. **The off-site copy is judged only after its unit is downloaded** — `LoadKeptOffsite` refuses an unversioned unit (`07` §6.6) BEFORE `prepare` (a dated folder's move-back); ask the repository once per page (`KeptOffsiteCopies`), never per row. Both pages name a copy through `KeptCopyKey` |
 

controller/README.md

@@ -1916,6 +1916,10 @@ that folder is never a dead end, and an install never runs into it silently (R-6
 - **Where it lives.** `<drive>/kept/` is beside `appdata/` and `userdata/`, inside neither: no app bind, FileBrowser
   userdata source, Samba share or backup leg reads it. It is in `ProtectedHDDPaths`.
 - **The drive-full warning** ends with the kept folders on that drive and their sizes (`fillwatch.SetExtra`).
+- **`after_install:` (v0.279.0, decision 45)** — `{service, user?, env: [NAMES], command: [...], success: MARKER}`: one
+  command in the app's own container after a FRESH install (never after a restore or a kept-data load), with the named
+  deploy values filled into `${NAME}`; the output must carry `success`. Recorded in `app.yaml` `after_install`; the app
+  page hides the default-login card once it succeeded and warns while a default login is in effect.
 - **R-704 (v0.278.0).** A new install (plain or "use my kept data") drops an update or crash-loop hold left by an EARLIER
   install of the app, and a removal clears both kinds; a restore hold (R-379) stays operator-cleared.
 - **R-690 (fixed here).** The removed-app restore (R-487) never found a unit on a DATA drive — it asked

controller/cmd/controller/after_install_wiring_test.go

@@ -0,0 +1,61 @@
+package main
+
+import (
+	"go/ast"
+	"go/parser"
+	"go/token"
+	"testing"
+)
+
+// v0.279.0 (decision 45): the deploy-done hook — the ONE place a fresh install ends — runs after_install, and
+// the hook is set on every box, not only inside `if notifier != nil` (a box with no hub still installs apps).
+// COMPANION RED-PROOF: move SetDeployDoneHook back inside `if notifier != nil` → the second assertion fails;
+// drop the RunAfterInstall call → the first fails.
+func TestAfterInstall_IsWiredToEveryFreshInstall(t *testing.T) {
+	fset := token.NewFileSet()
+	f, err := parser.ParseFile(fset, "main.go", nil, 0)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var hook *ast.CallExpr
+	var insideNotifierIf bool
+	var walk func(n ast.Node, underNotifier bool)
+	walk = func(n ast.Node, underNotifier bool) {
+		ast.Inspect(n, func(x ast.Node) bool {
+			if ifs, ok := x.(*ast.IfStmt); ok {
+				if be, ok := ifs.Cond.(*ast.BinaryExpr); ok {
+					if id, ok := be.X.(*ast.Ident); ok && id.Name == "notifier" && be.Op == token.NEQ {
+						walk(ifs.Body, true)
+						if ifs.Else != nil {
+							walk(ifs.Else, underNotifier)
+						}
+						return false
+					}
+				}
+			}
+			if c, ok := x.(*ast.CallExpr); ok {
+				if s, ok := c.Fun.(*ast.SelectorExpr); ok && s.Sel.Name == "SetDeployDoneHook" && hook == nil {
+					hook, insideNotifierIf = c, underNotifier
+				}
+			}
+			return true
+		})
+	}
+	walk(f, false)
+	if hook == nil {
+		t.Fatal("SetDeployDoneHook is never called")
+	}
+	calls := false
+	ast.Inspect(hook, func(x ast.Node) bool {
+		if s, ok := x.(*ast.SelectorExpr); ok && s.Sel.Name == "RunAfterInstall" {
+			calls = true
+		}
+		return true
+	})
+	if !calls {
+		t.Fatal("the deploy-done hook does not run RunAfterInstall")
+	}
+	if insideNotifierIf {
+		t.Fatal("SetDeployDoneHook is set only when a notifier exists — a box with no hub would never run after_install")
+	}
+}

controller/cmd/controller/main.go

@@ -1191,6 +1191,18 @@ func main() {
 		// It rides the EXISTING per-run digest (backup_run_failures) rather than a new event type: a
 		// new type is a two-repo change (the hub's allowedEventTypes drops anything unlisted), and the
 		// digest is already operator-only and already means "this run did not fully do its job".
+		// Part D (v0.279.0): a RUNNING app whose newest copy holds no database dump and no volume tar. Rides
+		// the same operator-only digest as R-203 (no new event type — the hub drops unlisted ones), once per
+		// app per tier per day (the backup package dedupes).
+		backupMgr.SetHollowCopyNotify(func(app, tier string) {
+			d := notify.BackupRunFailuresDetails{RunKind: "data-check", Attempted: 1, Failed: 1,
+				Apps: []notify.RunFailureDetail{{App: app, Leg: "hollow-" + tier,
+					Reason: "the app is running but its newest " + tier + " copy holds no database dump and no volume tar"}}}
+			notifier.NotifyBackupRunFailures(fmt.Sprintf(
+				"Backup holds NO DATA: %s is running, but its newest %s copy carries no database dump and no volume tar — "+
+					"the app is not protected on that tier. Check for a hold on a running app (R-704's shape) or a skipped dump.",
+				app, tier), d)
+		})
 		backupMgr.SetOffboxGapNotify(func(gaps map[string][]string) {
 			apps := make([]string, 0, len(gaps))
 			for app := range gaps {
@@ -1749,19 +1761,31 @@ func main() {
 	// R-536: „Alkalmazás telepítve" is sent when the async deploy ACTUALLY finishes, and a deploy
 	// that ends badly now says so instead of being silence. The accept-time event is
 	// `app_deploy_started`, emitted by the API router beside its 202.
-	if notifier != nil {
+	// v0.279.0: the hook is set on EVERY box — after_install (decision 45) must run on a box with no hub too;
-		stackMgr.SetDeployDoneHook(func(name string, ok bool, detail string) {
+	// only the events need the notifier.
-			display := name
+	stackMgr.SetDeployDoneHook(func(name string, ok bool, detail string) {
-			if s, found := stackMgr.GetStack(name); found && s.Meta.DisplayName != "" {
+		display := name
-				display = s.Meta.DisplayName
+		if s, found := stackMgr.GetStack(name); found && s.Meta.DisplayName != "" {
-			}
+			display = s.Meta.DisplayName
-			if ok {
+		}
+		if ok {
+			if notifier != nil {
 				notifier.NotifyAppDeployed(name, display)
-				return
 			}
+			// v0.279.0 (decision 45): a FRESH install replaces a known default login with its generated one,
+			// when the template declares after_install. Never on a restore or a kept-data load — those do not
+			// pass through the deploy-done hook.
+			go func() {
+				if ran, err := stackMgr.RunAfterInstall(name, 10*time.Minute); ran && err != nil {
+					log.Printf("[WARN] [stacks] after_install %s: %v", name, err)
+				}
+			}()
+			return
+		}
+		if notifier != nil {
 			notifier.NotifyAppDeployFailed(name, display, detail)
-		})
+		}
-	}
+	})
 	// R-681 (v0.270.0): an install a restart cut off is finished through the failure path and reported —
 	// AFTER the deploy-done hook exists, so its event is sent.
 	if names := stackMgr.RecoverInterruptedInstalls(); len(names) > 0 {

controller/internal/api/r706_verify_copy_test.go

@@ -0,0 +1,76 @@
+package api
+
+import (
+	"go/ast"
+	"go/parser"
+	"go/token"
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"gitea.dooplex.hu/admin/felhom-controller/internal/backup"
+	"gitea.dooplex.hu/admin/felhom-controller/internal/config"
+	"gitea.dooplex.hu/admin/felhom-controller/internal/settings"
+)
+
+// R-706 (v0.279.0) — a removal "with its backups" also deletes the app's off-site verification copy, and
+// ONLY that app's. COMPANION RED-PROOF: remove the removeVerificationCopy call from removeStack → the AST
+// check fails; make the helper skip the delete → the copy is still on disk.
+func TestR706_RemovalWithBackupsDeletesTheVerificationCopy(t *testing.T) {
+	dir := t.TempDir()
+	drive := filepath.Join(dir, "drive")
+	cfg := &config.Config{}
+	cfg.Paths.DataDir = filepath.Join(dir, "data")
+	_ = os.MkdirAll(cfg.Paths.DataDir, 0o755)
+	_ = os.MkdirAll(drive, 0o755)
+	sett, err := settings.Load(filepath.Join(cfg.Paths.DataDir, "settings.json"), log.New(io.Discard, "", 0))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := sett.AddStoragePath(settings.StoragePath{Path: drive, Label: "HDD", Schedulable: true}); err != nil {
+		t.Fatal(err)
+	}
+	bm := backup.NewManager(cfg, sett, log.New(io.Discard, "", 0))
+	mine, other := bm.OffsiteRestoreScratchPath("cloudapp"), bm.OffsiteRestoreScratchPath("otherapp")
+	if mine == "" || other == "" {
+		t.Fatalf("no verification-copy location resolved (%q, %q)", mine, other)
+	}
+	for _, p := range []string{mine, other} {
+		_ = os.MkdirAll(p, 0o755)
+		_ = os.WriteFile(filepath.Join(p, "restored.bin"), []byte("x"), 0o644)
+	}
+	r := &Router{backupMgr: bm, logger: log.New(io.Discard, "", 0)}
+	got := r.removeVerificationCopy("cloudapp")
+	if len(got) != 1 || !strings.HasPrefix(got[0], mine) {
+		t.Fatalf("reported %v, want the copy at %s", got, mine)
+	}
+	if _, err := os.Stat(mine); !os.IsNotExist(err) {
+		t.Fatalf("the verification copy is still on disk: %v", err)
+	}
+	if _, err := os.Stat(filepath.Join(other, "restored.bin")); err != nil {
+		t.Fatalf("another app's verification copy was touched: %v", err)
+	}
+
+	fset := token.NewFileSet()
+	f, err := parser.ParseFile(fset, "router.go", nil, 0)
+	if err != nil {
+		t.Fatal(err)
+	}
+	called := false
+	for _, d := range f.Decls {
+		if fn, ok := d.(*ast.FuncDecl); ok && fn.Name.Name == "removeStack" && fn.Body != nil {
+			ast.Inspect(fn.Body, func(n ast.Node) bool {
+				if s, ok := n.(*ast.SelectorExpr); ok && s.Sel.Name == "removeVerificationCopy" {
+					called = true
+				}
+				return true
+			})
+		}
+	}
+	if !called {
+		t.Fatal("removeStack does not call removeVerificationCopy (R-706)")
+	}
+}

controller/internal/api/router.go

@@ -929,6 +929,29 @@ func (r *Router) dropLeftoverHold(name, why string) {
 	}
 }
 
+// removeVerificationCopy (R-706, v0.279.0) deletes the app's off-site VERIFICATION copy
+// (`backups/offsite-restore/<app>`, left by a full off-site restore for the household to inspect) when the
+// app is removed "with its backups". Measured 2026-09-28 on demo-hp: ~1 GB stayed after such a removal, and
+// the app list no longer showed anything it belonged to. Returns the removed path as the removal reports it.
+// Pinned by TestR706_RemovalWithBackupsDeletesTheVerificationCopy.
+func (r *Router) removeVerificationCopy(name string) []string {
+	if r.backupMgr == nil {
+		return nil
+	}
+	var out []string
+	for _, c := range r.backupMgr.ListOffsiteRestoreCopies() {
+		if c.Stack != name {
+			continue
+		}
+		if err := r.backupMgr.DeleteOffsiteRestoreCopy(name); err != nil {
+			r.logger.Printf("[WARN] [api] remove %s: its off-site verification copy %s could not be deleted: %v", name, c.Path, err)
+			continue
+		}
+		out = append(out, fmt.Sprintf("%s (%s)", c.Path, c.SizeHuman))
+	}
+	return out
+}
+
 func (r *Router) removeStack(w http.ResponseWriter, req *http.Request, name string) {
 	if name == "" {
 		writeJSON(w, http.StatusBadRequest, apiResponse{OK: false, Error: "invalid stack name"})
@@ -1008,6 +1031,9 @@ func (r *Router) removeStack(w http.ResponseWriter, req *http.Request, name stri
 	if body.RemoveBackups && r.backupMgr != nil && len(mirrorDirs) > 0 {
 		resp.BackupPathsRemoved = append(resp.BackupPathsRemoved, r.backupMgr.RemoveTier2Mirrors(name, mirrorDirs)...)
 	}
+	if body.RemoveBackups {
+		resp.BackupPathsRemoved = append(resp.BackupPathsRemoved, r.removeVerificationCopy(name)...)
+	}
 
 	// R-486 (v0.240.0): the app's backup preferences — and with them the Tier-2 RECORD that
 	// tier2RecordedCopyDir needs — are forgotten ONLY when the customer asked for the backups to be

controller/internal/backup/backup.go

@@ -160,6 +160,9 @@ type Manager struct {
 	// INIT/TEST ONLY.
 	keptUnitRestoreFn func(app, unitDir string) (UnitRestoreResult, error)
 
+	// hollow (Part D, v0.279.0) — the running apps whose newest copy holds no data. See hollow_watch.go.
+	hollow hollowWatch
+
 	// F17 restore seams — overridable in tests so the .sql re-import orchestration can be unit-tested
 	// without Docker. Default to the real DiscoverDatabases / ImportDump (lazy-init in reimportDBDumps).
 	discoverDBs  func(ctx context.Context) ([]DiscoveredDB, error)
@@ -667,6 +670,8 @@ func (m *Manager) runDBDumpsInternal(ctx context.Context) error {
 	// Phase 2: refresh each deployed app's self-contained recovery unit (compose + manifest). A DATA run:
 	// the capture folds the stamps the legs above just wrote (v0.275.0).
 	m.captureAllRecoveryUnits(true)
+	// Part D (v0.279.0): a RUNNING app whose unit still holds no data after this run is an alarm.
+	m.checkLocalCopies()
 
 	// F5 (CAMPAIGN-3): after the units are fresh on the CURRENT drives, prune any orphaned
 	// backups/primary/<app> dir an app left on an OLD drive when its HDD_PATH moved — pure disk

controller/internal/backup/hollow_watch.go

@@ -0,0 +1,137 @@
+package backup
+
+import (
+	"sort"
+	"sync"
+	"time"
+)
+
+// ── Part D (v0.279.0): a RUNNING app whose newest copy holds no data is an alarm ─────────────────────
+//
+// Measured 2026-09-28 on demo-hp (controller 0.277.0): a freshly installed nextcloud carried a leftover
+// hold (R-704), so the dump leg skipped its volumes and its unit was never captured; the off-site run then
+// pushed a snapshot that "carried NO database dump and NO volume tar". The ONLY trace was one WARN line in
+// the container log (R-412 leg 1 made it honest wording, nothing more): no event, no page sentence. The app
+// was running and unprotected, and nobody could know.
+//
+// R-704 closed that cause. This closes the CLASS: at the end of each data leg, every installed app that is
+// RUNNING and has named volumes (the data a unit must carry — a database lives in a volume) must have a
+// copy that carries data (unitCarriesData — the manifest lists a dump or a tar). If not:
+//   - the operator hears it once per app, per tier, per day (the existing operator-only backup_run_failures
+//     digest, wired in main.go — no new event type);
+//   - the household sees one sentence per app on the backup page, until a later check finds data.
+// A HELD app that is really stopped is not flagged — a hold is a deliberate stop, and its copy is the one
+// the hold names. A held app that RUNS (yesterday's shape) is flagged.
+// Pinned by internal/backup/r_partd_hollow_watch_test.go.
+
+// Hollow-copy tiers.
+const (
+	HollowTierLocal   = "local"   // the app's own recovery unit (Tier 1), checked at the end of the dump leg
+	HollowTierOffsite = "offsite" // the unit the off-site run just pushed (Tier 3)
+)
+
+// HollowCopy is one running app whose newest copy on a tier holds no data.
+type HollowCopy struct {
+	App  string
+	Tier string
+	At   time.Time // when the check found it
+}
+
+type hollowWatch struct {
+	mu       sync.Mutex
+	current  map[string]HollowCopy // key app|tier
+	notified map[string]string     // key app|tier → the day (YYYY-MM-DD) the operator was told
+	notify   func(app, tier string)
+	now      func() time.Time
+}
+
+// SetHollowCopyNotify wires the operator signal (main.go → notifier). INIT-ONLY.
+func (m *Manager) SetHollowCopyNotify(fn func(app, tier string)) {
+	m.hollow.mu.Lock()
+	m.hollow.notify = fn
+	m.hollow.mu.Unlock()
+}
+
+// HollowCopies returns the flagged apps, sorted, for the backup page.
+func (m *Manager) HollowCopies() []HollowCopy {
+	m.hollow.mu.Lock()
+	defer m.hollow.mu.Unlock()
+	out := make([]HollowCopy, 0, len(m.hollow.current))
+	for _, h := range m.hollow.current {
+		out = append(out, h)
+	}
+	sort.Slice(out, func(i, j int) bool {
+		if out[i].App != out[j].App {
+			return out[i].App < out[j].App
+		}
+		return out[i].Tier < out[j].Tier
+	})
+	return out
+}
+
+// watchesForData: a deployed app that RUNS and has named volumes. A held app that is stopped is skipped.
+func (m *Manager) watchesForData(app string) bool {
+	if m.stackProvider == nil || m.cfg != nil && m.cfg.IsProtectedStack(app) {
+		return false
+	}
+	if len(m.stackProvider.GetDockerVolumes(app)) == 0 {
+		return false
+	}
+	return m.stackProvider.RefreshAndIsRunning(app)
+}
+
+// judgeCopy records the verdict for one app's copy on a tier: flags (and tells the operator, once a day) a
+// running app's copy with no data, clears the flag when the copy carries data.
+func (m *Manager) judgeCopy(app, tier, unitDir string) {
+	key := app + "|" + tier
+	hollow := m.watchesForData(app) && !unitCarriesData(unitDir)
+	m.hollow.mu.Lock()
+	if m.hollow.current == nil {
+		m.hollow.current = map[string]HollowCopy{}
+		m.hollow.notified = map[string]string{}
+	}
+	now := time.Now
+	if m.hollow.now != nil {
+		now = m.hollow.now
+	}
+	if !hollow {
+		delete(m.hollow.current, key)
+		m.hollow.mu.Unlock()
+		return
+	}
+	t := now()
+	m.hollow.current[key] = HollowCopy{App: app, Tier: tier, At: t}
+	day := t.Format("2006-01-02")
+	tell := m.hollow.notify != nil && m.hollow.notified[key] != day
+	if tell {
+		m.hollow.notified[key] = day
+	}
+	fn := m.hollow.notify
+	m.hollow.mu.Unlock()
+	m.logger.Printf("[ERROR] [backup] %s is RUNNING but its newest %s copy (%s) holds NO database dump and NO volume tar — it is not protected (Part D)", app, tier, unitDir)
+	if tell {
+		fn(app, tier)
+	}
+}
+
+// checkLocalCopies judges every deployed app's own unit at the end of the dump leg.
+func (m *Manager) checkLocalCopies() {
+	if m.stackProvider == nil {
+		return
+	}
+	for _, s := range m.stackProvider.ListDeployedStacks() {
+		m.judgeCopy(s.Name, HollowTierLocal, m.primaryUnitDirFor(s.Name))
+	}
+}
+
+// FlagHollowCopyForTest records a flagged copy without a backup run (the web package's render test).
+// Test-only by name: only judgeCopy may decide a copy is hollow.
+func (m *Manager) FlagHollowCopyForTest(app, tier string) {
+	m.hollow.mu.Lock()
+	defer m.hollow.mu.Unlock()
+	if m.hollow.current == nil {
+		m.hollow.current = map[string]HollowCopy{}
+		m.hollow.notified = map[string]string{}
+	}
+	m.hollow.current[app+"|"+tier] = HollowCopy{App: app, Tier: tier, At: time.Now()}
+}

controller/internal/backup/offbox.go

@@ -1384,6 +1384,7 @@ func (m *Manager) runOffboxInternal(ctx context.Context, apps, base, env []strin
 		// WORDING ONLY. This adds no guard and does NOT touch the capture — `07` §8.2 records why
 		// guarding the capture would make the manifest lie. The reader of a log gets the fact; whether
 		// the push should refuse is R-412 leg 2 and is still open.
+		m.judgeCopy(stack, HollowTierOffsite, src) // Part D (v0.279.0): a running app's empty snapshot is an alarm
 		if unitIsHollow(src) {
 			m.logger.Printf("[WARN] [offbox] backed up %s (%s, %d mandatory path(s)) — but the recovery unit carried NO database dump and NO volume tar, so this snapshot holds none of the app's data; the next run with a dump leg will replace it",
 				stack, src, len(extra))

controller/internal/backup/r_partd_hollow_watch_test.go

@@ -0,0 +1,91 @@
+package backup
+
+import (
+	"encoding/json"
+	"io"
+	"log"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"gitea.dooplex.hu/admin/felhom-controller/internal/config"
+	"gitea.dooplex.hu/admin/felhom-controller/internal/settings"
+)
+
+// hollowProvider: per-app volumes and running state; everything else from floorProvider.
+type hollowProvider struct {
+	floorProvider
+	volumes map[string][]string
+	running map[string]bool
+}
+
+func (p *hollowProvider) GetDockerVolumes(n string) []string { return p.volumes[n] }
+func (p *hollowProvider) RefreshAndIsRunning(n string) bool  { return p.running[n] }
+
+// Part D (v0.279.0) — the CONSEQUENCE: a running app whose newest copy holds no data reaches the operator
+// (once per app per tier per day) and the backup page; a copy with data clears it; a stopped (held) app
+// and an app with no volumes are never flagged.
+// COMPANION RED-PROOF: make judgeCopy ignore unitCarriesData (the pre-0.279.0 shape: nothing but a log) →
+// no notification and the first assertion fails.
+func TestPartD_ARunningAppWithAnEmptyCopyIsAnAlarm(t *testing.T) {
+	sett, err := settings.Load(filepath.Join(t.TempDir(), "settings.json"), log.New(io.Discard, "", 0))
+	if err != nil {
+		t.Fatal(err)
+	}
+	cfg := &config.Config{}
+	cfg.Paths.SystemDataPath = t.TempDir()
+	m := NewManager(cfg, sett, log.New(io.Discard, "", 0))
+	p := &hollowProvider{floorProvider: floorProvider{stacks: []string{"cloud", "held", "novol"}, dir: t.TempDir()},
+		volumes: map[string][]string{"cloud": {"cloud_db"}, "held": {"held_db"}},
+		running: map[string]bool{"cloud": true, "novol": true}}
+	m.SetStackProvider(p)
+	day := time.Date(2026, 9, 28, 15, 20, 0, 0, time.UTC)
+	m.hollow.now = func() time.Time { return day }
+	var told []string
+	m.SetHollowCopyNotify(func(app, tier string) { told = append(told, app+"/"+tier) })
+
+	unit := t.TempDir()
+	writeMan := func(withData bool) {
+		man := RecoveryManifest{SchemaVersion: 2, AppName: "cloud"}
+		if withData {
+			man.DBDumps = []string{"cloud.sql"}
+		}
+		b, _ := json.Marshal(man)
+		_ = os.WriteFile(UnitManifestFile(unit), b, 0o644)
+	}
+	writeMan(false) // yesterday's shape: a manifest listing nothing
+
+	for _, app := range []string{"cloud", "held", "novol"} {
+		m.judgeCopy(app, HollowTierOffsite, unit)
+	}
+	if len(told) != 1 || told[0] != "cloud/offsite" {
+		t.Fatalf("operator told %v, want exactly [cloud/offsite] (held+stopped and volume-less apps are not flagged)", told)
+	}
+	if h := m.HollowCopies(); len(h) != 1 || h[0].App != "cloud" || h[0].Tier != HollowTierOffsite {
+		t.Fatalf("page list %+v, want the one running app", h)
+	}
+	// Same day again: still flagged, NOT told twice.
+	m.judgeCopy("cloud", HollowTierOffsite, unit)
+	if len(told) != 1 {
+		t.Fatalf("told twice in one day: %v", told)
+	}
+	// A missing unit (no manifest) is also no data — fail closed.
+	m.judgeCopy("cloud", HollowTierLocal, filepath.Join(unit, "absent"))
+	if len(told) != 2 || told[1] != "cloud/local" {
+		t.Fatalf("an absent local unit was not flagged: %v", told)
+	}
+	// The next day: told again.
+	m.hollow.now = func() time.Time { return day.Add(24 * time.Hour) }
+	m.judgeCopy("cloud", HollowTierOffsite, unit)
+	if len(told) != 3 {
+		t.Fatalf("not told again the next day: %v", told)
+	}
+	// The copy carries data again: cleared from the page.
+	writeMan(true)
+	m.judgeCopy("cloud", HollowTierOffsite, unit)
+	m.judgeCopy("cloud", HollowTierLocal, unit)
+	if h := m.HollowCopies(); len(h) != 0 {
+		t.Fatalf("a copy with data is still listed: %+v", h)
+	}
+}

controller/internal/backupwindow/backupwindow.go

@@ -26,6 +26,11 @@ const (
 // gate — one constant, so the two can never disagree (TestLegDeadlineAndGateShareW5h).
 const UpdateLegStopOffsetMin = 300
 
+// UpdateLegLengthMin is how long the leg may start steps on a normal night: from the off-site leg (W+105m),
+// after which it is chained, to W+5h. A MANUAL run of the night's chain (R-705) gives the leg this same
+// length, counted from when it starts.
+const UpdateLegLengthMin = UpdateLegStopOffsetMin - offboxOffsetMin
+
 // ParseHHMM parses "HH:MM" (24h) into minutes-since-midnight. It rejects anything but a valid
 // hour:minute — the same contract as the scheduler's parseDailyTime, kept here so this package is
 // dependency-free and reusable by the quiesce gate.

controller/internal/i18n/locales/en.json

@@ -111,6 +111,7 @@
   "app_import.tarolo": "Storage",
   "app_import.titkos": "Encrypted",
   "app_import.visszaallitas_inditasa": "Start restore",
+  "app_info.known_login": "This app starts with a known, shared password: %s. Change it right after the install.",
   "app_info.a_kezdeti_jelszo_beolvasasa_nem": "The first password could not be read.",
   "app_info.a_regi_adatok_erintetlenek": "The old data is untouched.",
   "app_info.adatait_ide": "data to:",
@@ -233,6 +234,8 @@
   "backups.utolso_sikeres_mentes": "✓ Last successful backup: {{fmtTime .SuccessAt}} ({{timeAgo .SuccessAt}})",
   "backups.utolso_teljes_mentes": "Last full backup",
   "backups.visszaallitas_ellenorizve": "Restore checked",
+  "backups_apps.hollow_local": "%s is running, but its newest local backup holds no data (no database, no data volume). So it is not protected now. Felhom knows about it.",
+  "backups_apps.hollow_offsite": "%s is running, but its newest off-site copy holds no data (no database, no data volume). So it is not protected off-site now. Felhom knows about it.",
   "backups_apps.1_mentes": "Backup 1",
   "backups_apps.1_mentes_auto": "Backup 1 auto",
   "backups_apps.2_mentes": "Backup 2",
@@ -899,6 +902,7 @@
   "datapath.consequence.import_excluded": "Copy the files to be processed in here. The app reads them and then deletes them from here — this folder is temporary and is not backed up.",
   "datapath.consequence.kept": "This is where your files are kept. It is backed up.",
   "datapath.free_space": "%.1f GB free",
+  "debug.night_chain": "Tonight's chain now (dump → second drive → off-site → update)",
   "debug.aktiv": "Active",
   "debug.aktiv_feladat": "Active job",
   "debug.alkalmazas": "App",

controller/internal/i18n/locales/hu.json

@@ -107,6 +107,7 @@
   "app_import.tarolo": "Tároló",
   "app_import.titkos": "Titkos",
   "app_import.visszaallitas_inditasa": "Visszaállítás indítása",
+  "app_info.known_login": "Ez az alkalmazás egy ismert, közös jelszóval indul: %s. Telepítés után azonnal változtasd meg.",
   "app_info.a_kezdeti_jelszo_beolvasasa_nem": "A kezdeti jelszó beolvasása nem sikerült.",
   "app_info.a_regi_adatok_erintetlenek": "A régi adatok érintetlenek.",
   "app_info.adatait_ide": "adatait ide:",
@@ -229,6 +230,8 @@
   "backups.utolso_sikeres_mentes": "✓ Utolsó sikeres mentés: {{fmtTime .SuccessAt}} ({{timeAgo .SuccessAt}})",
   "backups.utolso_teljes_mentes": "Utolsó teljes mentés",
   "backups.visszaallitas_ellenorizve": "Visszaállítás ellenőrizve",
+  "backups_apps.hollow_local": "A(z) %s fut, de a legutóbbi helyi mentése nem tartalmaz adatot (se adatbázist, se adatkötetet). Így most nincs védve. A Felhom tud róla.",
+  "backups_apps.hollow_offsite": "A(z) %s fut, de a legutóbbi távoli mentése nem tartalmaz adatot (se adatbázist, se adatkötetet). Így most nincs védve távol. A Felhom tud róla.",
   "backups_apps.1_mentes": "1. mentés",
   "backups_apps.1_mentes_auto": "1. mentés auto",
   "backups_apps.2_mentes": "2. mentés",
@@ -894,6 +897,7 @@
   "datapath.consequence.import_excluded": "Ide másold a feldolgozandó fájlokat. Az alkalmazás beolvassa, majd törli innen — ez a mappa átmeneti, és nem készül róla biztonsági mentés.",
   "datapath.consequence.kept": "Itt tárolódnak a fájljaid. Biztonsági mentés készül róla.",
   "datapath.free_space": "%.1f GB szabad",
+  "debug.night_chain": "Az éjszakai lánc most (mentés → 2. meghajtó → távoli → frissítés)",
   "debug.aktiv": "Aktív",
   "debug.aktiv_feladat": "Aktív feladat",
   "debug.alkalmazas": "Alkalmazás",

controller/internal/stacks/after_install.go

@@ -0,0 +1,154 @@
+package stacks
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+// ── after_install (v0.279.0, `09` §3 decision 45): no app is published with a login a stranger knows ──
+//
+// Some apps start with a known, shared admin password (claper seeds admin@claper.co / claper at every first
+// start — measured on 9202 2026-09-28, R-702). The box publishes every app on the household's domain. So
+// where the app's OWN CLI or API can change it, the template declares ONE command the box runs once, in the
+// app's own container, right after a FRESH install:
+//
+//	after_install:
+//	  service: claper
+//	  env: [ADMIN_PASSWORD]          # deploy values filled into the command; nothing else is
+//	  command: ["/app/bin/claper", "rpc", "... ${ADMIN_PASSWORD} ..."]
+//	  success: FELHOM_AFTER_INSTALL_OK   # the command's output must carry this, or it failed
+//
+// The value is a generated `type: password` field, so the household sees it on the app page as the first
+// password (the grafana/code-server pattern).
+//
+// ONLY after a fresh install (the deploy-done hook, ok=true). NEVER after a restore or "use my kept data":
+// there the login comes back with the data, and changing it would lock the household out (R-694). A failed
+// command is retried while the app boots, then recorded (`after_install` in app.yaml) and shown on the app
+// page; the app stays installed and running — never half-installed. The expanded command is never logged
+// (it carries the password); the log names the template.
+// Pinned by internal/stacks/after_install_test.go.
+
+// AfterInstallCommand is `.felhom.yml`'s `after_install:`.
+type AfterInstallCommand struct {
+	Service string   `yaml:"service" json:"service"`
+	User    string   `yaml:"user,omitempty" json:"user,omitempty"`
+	Env     []string `yaml:"env,omitempty" json:"env,omitempty"`
+	Command []string `yaml:"command" json:"command"`
+	Success string   `yaml:"success" json:"success"`
+}
+
+// AfterInstallRecord is app.yaml's `after_install:` — what the one-time command did.
+type AfterInstallRecord struct {
+	At     string `yaml:"at" json:"at"`
+	OK     bool   `yaml:"ok" json:"ok"`
+	Detail string `yaml:"detail,omitempty" json:"detail,omitempty"`
+}
+
+// afterInstallTries / afterInstallGap: the app may still be booting when the deploy reports done.
+var (
+	afterInstallTries = 6
+	afterInstallGap   = 20 * time.Second
+)
+
+// expandAfterInstall fills ${NAME} for the declared env names only, from the app's env. An undeclared or
+// empty name refuses — a command with a hole must never run (it could set an EMPTY password).
+func expandAfterInstall(cmd []string, allowed []string, env map[string]string) ([]string, error) {
+	ok := map[string]bool{}
+	for _, n := range allowed {
+		ok[n] = true
+	}
+	var missing []string
+	out := make([]string, len(cmd))
+	for i, a := range cmd {
+		out[i] = os.Expand(a, func(k string) string {
+			if !ok[k] || env[k] == "" {
+				missing = append(missing, k)
+				return ""
+			}
+			return env[k]
+		})
+	}
+	if len(missing) > 0 {
+		return nil, fmt.Errorf("after_install: %v not declared in env or has no value — not run", missing)
+	}
+	return out, nil
+}
+
+// RunAfterInstall runs the app's after_install once, after a FRESH install (main.go's deploy-done hook).
+// Returns (ran, error). Records the outcome in app.yaml either way.
+func (m *Manager) RunAfterInstall(name string, wait time.Duration) (bool, error) {
+	st, ok := m.GetStack(name)
+	if !ok {
+		return false, fmt.Errorf("stack %q not found", name)
+	}
+	ai := st.Meta.AfterInstall
+	if ai == nil || ai.Service == "" || len(ai.Command) == 0 || ai.Success == "" {
+		return false, nil
+	}
+	dir := filepath.Dir(st.ComposePath)
+	record := func(ok bool, detail string) {
+		rec := &AfterInstallRecord{At: m.now().UTC().Format(time.RFC3339), OK: ok, Detail: truncateStr(detail, 300)}
+		m.mutateAppConfig(name, dir, "after_install", func(cfg *AppConfig) bool { cfg.AfterInstall = rec; return true })
+	}
+	cfg := LoadAppConfigDecrypted(dir, m.encKey)
+	if cfg == nil {
+		record(false, "the app's settings could not be read")
+		return true, fmt.Errorf("after_install %s: app.yaml unreadable", name)
+	}
+	cmd, err := expandAfterInstall(ai.Command, ai.Env, cfg.Env)
+	if err != nil {
+		m.logger.Printf("[ERROR] [stacks] %s: %v", name, err)
+		record(false, err.Error())
+		return true, err
+	}
+	deadline := time.Now().Add(wait)
+	for {
+		_ = m.RefreshStatus()
+		if s, ok := m.GetStack(name); ok && (s.State == StateRunning || s.State == StateUnhealthy) {
+			break
+		}
+		if time.Now().After(deadline) {
+			record(false, "the app did not start in time")
+			return true, fmt.Errorf("after_install %s: the app did not start within %s — not run", name, wait)
+		}
+		time.Sleep(5 * time.Second)
+	}
+	return true, m.runAfterInstallNow(name, ai, cmd, record)
+}
+
+// runAfterInstallNow runs the expanded command (RunAfterInstall has waited for the app): retries while the
+// output lacks the success marker, then records the outcome.
+func (m *Manager) runAfterInstallNow(name string, ai *AfterInstallCommand, cmd []string, record func(ok bool, detail string)) error {
+	dir := ""
+	if st, ok := m.GetStack(name); ok {
+		dir = filepath.Dir(st.ComposePath)
+	}
+	args := []string{"exec", "-T"}
+	if ai.User != "" {
+		args = append(args, "-u", ai.User)
+	}
+	args = append(args, ai.Service)
+	args = append(args, cmd...)
+	var last string
+	for try := 1; try <= afterInstallTries; try++ {
+		t0 := time.Now()
+		out, err := m.afterLoadExec(dir, args...)
+		if err == nil && strings.Contains(out, ai.Success) {
+			m.logger.Printf("[INFO] [stacks] after_install %s: %s %v done in %s (try %d) — the app's known first login is replaced by its generated one",
+				name, ai.Service, ai.Command, time.Since(t0).Round(time.Millisecond), try)
+			record(true, "")
+			return nil
+		}
+		last = fmt.Sprintf("try %d: err=%v, no %q in the output", try, err, ai.Success)
+		m.logger.Printf("[WARN] [stacks] after_install %s: %s %v %s", name, ai.Service, ai.Command, last)
+		if try < afterInstallTries {
+			time.Sleep(afterInstallGap)
+		}
+	}
+	m.logger.Printf("[ERROR] [stacks] after_install %s FAILED after %d tries — the app runs with its KNOWN default login; the app page says so", name, afterInstallTries)
+	record(false, last)
+	return fmt.Errorf("after_install %s failed: %s", name, last)
+}

controller/internal/stacks/after_install_test.go

@@ -0,0 +1,91 @@
+package stacks
+
+import (
+	"bytes"
+	"errors"
+	"log"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+)
+
+// v0.279.0 (decision 45) — after_install: the one command after a FRESH install that replaces a known default
+// login with the generated one. The exec is the seam; nothing reaches Docker.
+// COMPANION RED-PROOFS: (1) drop the success-marker check in runAfterInstallNow → a failing command is
+// recorded ok and the second case fails; (2) make expandAfterInstall allow an undeclared/empty name → the
+// command runs with a hole and the third case fails.
+func TestAfterInstall_ReplacesTheDefaultLoginOnceAndRecordsIt(t *testing.T) {
+	m, _ := keptManager(t)
+	var logBuf bytes.Buffer
+	m.logger = log.New(&logBuf, "", 0)
+	afterInstallTries, afterInstallGap = 3, 0
+	t.Cleanup(func() { afterInstallTries, afterInstallGap = 6, 20*time.Second })
+	dir := filepath.Dir(m.stacks["cloudapp"].ComposePath)
+	must(t, SaveAppConfig(dir, &AppConfig{Deployed: true, Env: map[string]string{"ADMIN_PASSWORD": "Gen3r4tedValue"}}, m.encKey, nil))
+	ai := &AfterInstallCommand{Service: "cloudapp", Env: []string{"ADMIN_PASSWORD"},
+		Command: []string{"/app/bin/tool", "set-admin", "${ADMIN_PASSWORD}"}, Success: "FELHOM_OK"}
+	m.mu.Lock()
+	m.stacks["cloudapp"].Meta.AfterInstall = ai
+	m.mu.Unlock()
+	record := func(ok bool, d string) {
+		m.mutateAppConfig("cloudapp", dir, "after_install", func(c *AppConfig) bool {
+			c.AfterInstall = &AfterInstallRecord{At: "t", OK: ok, Detail: d}
+			return true
+		})
+	}
+
+	// 1. Success: the value is filled in, the command runs ONCE, the record says ok, the log never carries it.
+	var calls [][]string
+	m.afterLoadFn = func(_ string, args ...string) (string, error) { calls = append(calls, args); return "... FELHOM_OK", nil }
+	cmd, err := expandAfterInstall(ai.Command, ai.Env, map[string]string{"ADMIN_PASSWORD": "Gen3r4tedValue"})
+	must(t, err)
+	if err := m.runAfterInstallNow("cloudapp", ai, cmd, record); err != nil {
+		t.Fatal(err)
+	}
+	if len(calls) != 1 || strings.Join(calls[0], " ") != "exec -T cloudapp /app/bin/tool set-admin Gen3r4tedValue" {
+		t.Fatalf("ran %v", calls)
+	}
+	if c := LoadAppConfig(dir); c.AfterInstall == nil || !c.AfterInstall.OK {
+		t.Fatalf("record: %+v", c.AfterInstall)
+	}
+	if strings.Contains(logBuf.String(), "Gen3r4tedValue") {
+		t.Fatal("the generated password reached the log")
+	}
+
+	// 2. No success marker: retried, then recorded as FAILED — never recorded ok.
+	calls = nil
+	m.afterLoadFn = func(_ string, args ...string) (string, error) { calls = append(calls, args); return "boom", errors.New("exit 1") }
+	if err := m.runAfterInstallNow("cloudapp", ai, cmd, record); err == nil {
+		t.Fatal("a failing command reported success")
+	}
+	if len(calls) != 3 {
+		t.Fatalf("tries %d, want 3", len(calls))
+	}
+	if c := LoadAppConfig(dir); c.AfterInstall == nil || c.AfterInstall.OK {
+		t.Fatalf("a failure was recorded as ok: %+v", c.AfterInstall)
+	}
+
+	// 2b. Exit 0 WITHOUT the marker (claper's `rpc` exits 0 on an Elixir error): still a failure.
+	calls = nil
+	m.afterLoadFn = func(_ string, args ...string) (string, error) {
+		calls = append(calls, args)
+		return "FELHOM_AFTER_INSTALL_FAILED {:error, changeset}", nil
+	}
+	if err := m.runAfterInstallNow("cloudapp", ai, cmd, record); err == nil {
+		t.Fatal("an exit-0 command without the success marker reported success")
+	}
+	if c := LoadAppConfig(dir); c.AfterInstall == nil || c.AfterInstall.OK {
+		t.Fatalf("an exit-0 failure was recorded as ok: %+v", c.AfterInstall)
+	}
+
+	// 3. A value that is not declared, or empty, refuses BEFORE anything runs (never an empty password).
+	for _, env := range []map[string]string{{}, {"ADMIN_PASSWORD": ""}} {
+		if _, err := expandAfterInstall(ai.Command, ai.Env, env); err == nil {
+			t.Fatalf("expanded with env %v", env)
+		}
+	}
+	if _, err := expandAfterInstall([]string{"x ${OTHER}"}, ai.Env, map[string]string{"OTHER": "v"}); err == nil {
+		t.Fatal("an undeclared name was filled in")
+	}
+}

controller/internal/stacks/deploy.go

@@ -179,6 +179,8 @@ type AppConfig struct {
 	// removed app, a rebuilt guest) while the app's own login came back with its data. The page then shows
 	// no value for them and says the old password is the one that works (restoredLoginFields).
 	RestoredLogins []string `yaml:"restored_logins,omitempty" json:"restored_logins,omitempty"`
+	// AfterInstall (v0.279.0, decision 45) is what the template's one-time after_install command did.
+	AfterInstall *AfterInstallRecord `yaml:"after_install,omitempty" json:"after_install,omitempty"`
 }
 
 // InstalledImage is one compose service's observed image. See AppConfig.InstalledImages.

controller/internal/stacks/life_records.go

@@ -31,6 +31,7 @@ func carryLifeRecords(logger *log.Logger, name string, prior, cfg *AppConfig) {
 	cfg.FailedStep = prior.FailedStep
 	cfg.LastUpdateUndone = prior.LastUpdateUndone
 	cfg.LastAutoUpdate = prior.LastAutoUpdate
+	cfg.AfterInstall = prior.AfterInstall // v0.279.0: what the install's one-time command did stays true after a restore
 	if n := len(prior.EarlierConversionCopies); prior.ConversionCopy != nil || n > 0 {
 		cur := ""
 		if prior.ConversionCopy != nil {

controller/internal/stacks/metadata.go

@@ -52,8 +52,11 @@ type Metadata struct {
 	// app's kept data (a database from a backup under files kept on the drive) — for an app whose own
 	// index of its files must be rebuilt. Measured on nextcloud: a file written after the backup is on
 	// the drive and invisible until `occ files:scan --all`. Optional; absent = nothing runs.
-	AfterLoad    *AfterLoadCommand `yaml:"after_load,omitempty" json:"after_load,omitempty"`
+	AfterLoad *AfterLoadCommand `yaml:"after_load,omitempty" json:"after_load,omitempty"`
-	Integrations []IntegrationDef  `yaml:"integrations,omitempty" json:"integrations,omitempty"`
+	// AfterInstall (v0.279.0, `09` §3 decision 45) is ONE command the box runs once after a FRESH install —
+	// to replace a known default login with the generated one. See after_install.go.
+	AfterInstall *AfterInstallCommand `yaml:"after_install,omitempty" json:"after_install,omitempty"`
+	Integrations []IntegrationDef     `yaml:"integrations,omitempty" json:"integrations,omitempty"`
 	// InitialCreds: for apps that auto-generate a first-login credential into a file inside the
 	// container (e.g. Crafty's default-creds.txt). The controller reads + parses that file live and
 	// surfaces it on the app page, so the customer never has to dig through logs. Optional.

controller/internal/stacks/unattended.go

@@ -217,6 +217,17 @@ func LegDeadline(now time.Time, window string, loc *time.Location) time.Time {
 // RunUpdateLeg runs one night's leg and returns its summary (nil when another leg is running or the leg
 // is not wired). trigger names the caller for the log ("after-offsite").
 func (m *Manager) RunUpdateLeg(ctx context.Context, trigger string) *UpdateLegSummary {
+	return m.runUpdateLeg(ctx, trigger, false)
+}
+
+// RunUpdateLegNow is the leg for a MANUAL run of the night's chain (R-705, the debug action): the same
+// leg, but its step deadline is its start + the leg's normal length (backupwindow.UpdateLegLengthMin),
+// not W+5h of the last window — which, by day, has passed and would make the leg start nothing.
+func (m *Manager) RunUpdateLegNow(ctx context.Context, trigger string) *UpdateLegSummary {
+	return m.runUpdateLeg(ctx, trigger, true)
+}
+
+func (m *Manager) runUpdateLeg(ctx context.Context, trigger string, manual bool) *UpdateLegSummary {
 	if !m.leg.run.TryLock() {
 		m.logger.Printf("[WARN] [update-leg] a leg is already running — this call (%s) does nothing", trigger)
 		return nil
@@ -249,6 +260,9 @@ func (m *Manager) RunUpdateLeg(ctx context.Context, trigger string) *UpdateLegSu
 		window = o.WindowStart()
 	}
 	sum.Deadline = LegDeadline(sum.StartedAt, window, o.Location)
+	if manual {
+		sum.Deadline = sum.StartedAt.Add(time.Duration(backupwindow.UpdateLegLengthMin) * time.Minute)
+	}
 	m.setLegFlags(true, false)
 	defer m.setLegFlags(false, false)
 	m.logger.Printf("[INFO] [update-leg] started (%s): window %s, no step starts at or after %s", trigger, window, sum.Deadline.In(o.Location).Format("15:04"))

controller/internal/stacks/unattended_test.go

@@ -473,3 +473,23 @@ func TestR687_EmptyLegReportsEmptySteps(t *testing.T) {
 		t.Fatalf("an empty leg must report steps as [], got %s", b)
 	}
 }
+
+// R-705 (v0.279.0) — the MANUAL chain's leg runs by day: at 18:00 the night's W+5h (07:30) has passed, so the
+// night leg starts nothing (window_end), while RunUpdateLegNow gives the leg its normal length from its own
+// start and presses the step. COMPANION RED-PROOF: drop the `if manual` deadline in runUpdateLeg → the manual
+// run also reports window_end and starts nothing.
+func TestR705_TheManualLegRunsByDay(t *testing.T) {
+	day := time.Date(2026, 9, 25, 18, 0, 0, 0, time.UTC)
+	m, _, _, ups, _ := legManager(t)
+	legOpts(m, func(o *UpdateLegOptions) { o.Now = func() time.Time { return day } })
+	if s := m.RunUpdateLeg(context.Background(), "night"); s == nil || s.Stopped != LegSkipWindowEnd || len(*ups) != 0 {
+		t.Fatalf("by day the NIGHT leg must start nothing: ups=%v summary=%+v", *ups, s)
+	}
+	s := m.RunUpdateLegNow(context.Background(), "manual-chain")
+	if s == nil || !s.Deadline.Equal(day.Add(195*time.Minute)) {
+		t.Fatalf("the manual leg's deadline %v, want %v", s.Deadline, day.Add(195*time.Minute))
+	}
+	if len(*ups) == 0 || legStepFor(s, "nextcloud").Reason == LegSkipWindowEnd {
+		t.Fatalf("the manual leg pressed nothing by day: ups=%v summary=%+v", *ups, s)
+	}
+}

controller/internal/web/handler_debug.go

@@ -75,6 +75,9 @@ func (s *Server) handleDebugAPI(w http.ResponseWriter, r *http.Request) {
 	// it. Only the debug route was absent, so this is IMPLEMENTED rather than deleted.
 	case subpath == "backup/crossdrive" && r.Method == http.MethodPost:
 		s.debugRunCrossDrive(w, r)
+	// R-705 (v0.279.0): the night's four legs, in order, now.
+	case subpath == "backup/night-chain" && r.Method == http.MethodPost:
+		s.debugRunNightChain(w, r)
 	// R-397 — the button at debug.html:83 has posted here since it was added and NOTHING answered.
 	// Verified 2026-08-30: this dispatch had no such case, so pressing „Restic integritás" did
 	// nothing at all. Seventh instance of built-but-never-wired in this project; filed as R-400 in its

controller/internal/web/handlers.go

@@ -460,6 +460,10 @@ func (s *Server) deployHandler(w http.ResponseWriter, r *http.Request, name stri
 	data["Meta"] = meta
 	data["AppConfig"] = appCfg
 	data["AlreadyDeployed"] = alreadyDeployed
+	// v0.279.0 (decision 45): the default login, before the install when nothing will replace it, after it
+	// while it is still in effect.
+	data["KnownLoginLine"] = s.knownLoginLine(lang, meta, appCfg, alreadyDeployed)
+	data["DefaultLoginReplaced"] = meta.AfterInstall != nil && !defaultLoginInEffect(meta, appCfg, alreadyDeployed)
 	data["LogoURL"] = s.cfg.AppLogoURL(meta.Slug)
 	data["LogoPNGURL"] = s.cfg.AppLogoPNGURL(meta.Slug)
 	data["AppPageURL"] = s.cfg.AppPageURL(meta.Slug)
@@ -756,6 +760,9 @@ func (s *Server) appDetailHandler(w http.ResponseWriter, r *http.Request, slug s
 	data["Stack"] = found
 	data["Meta"] = found.Meta
 	data["AppInfo"] = found.Meta.AppInfo
+	// v0.279.0 (decision 45): the default-login card only while that login is in effect.
+	data["KnownLoginLine"] = s.knownLoginLine(s.langFor(r), &found.Meta, found.AppConfig, found.Deployed)
+	data["DefaultLoginReplaced"] = found.Meta.AfterInstall != nil && !defaultLoginInEffect(&found.Meta, found.AppConfig, found.Deployed)
 	data["HasAppInfo"] = found.Meta.HasAppInfo()
 	data["EffectiveSubdomain"] = effectiveSubdomain
 
@@ -1124,6 +1131,7 @@ func (s *Server) backupsAppsHandler(w http.ResponseWriter, r *http.Request) {
 	data := s.backupsCommonData("backups-apps", "Biztonsági mentés — Alkalmazások", r)
 	data["TitleKey"] = "page.title.backups_apps" // i18n: the Hungarian title above is what hu renders
 	s.backupsOffboxData(data, s.langFor(r))      // the tier-3 rows render $.Offbox status
+	data["HollowCopyLines"] = s.hollowCopyLines(s.langFor(r)) // Part D: running apps whose copy holds no data
 
 	if fullStatus, ok := data["Backup"].(*backup.FullBackupStatus); ok && fullStatus != nil {
 		// Enrich AppDataInfo with storage labels
@@ -1151,6 +1159,26 @@ func (s *Server) backupsAppsHandler(w http.ResponseWriter, r *http.Request) {
 	s.executeTemplate(w, r, "backups_apps", data)
 }
 
+// hollowCopyLines (Part D, v0.279.0) — one sentence per running app whose newest copy holds no data.
+func (s *Server) hollowCopyLines(lang string) []string {
+	if s.backupMgr == nil {
+		return nil
+	}
+	var out []string
+	for _, h := range s.backupMgr.HollowCopies() {
+		name := h.App
+		if st, ok := s.stackMgr.GetStack(h.App); ok && st.Meta.DisplayName != "" {
+			name = st.Meta.DisplayName
+		}
+		key := "backups_apps.hollow_local"
+		if h.Tier == backup.HollowTierOffsite {
+			key = "backups_apps.hollow_offsite"
+		}
+		out = append(out, s.msgLang(lang, key, name))
+	}
+	return out
+}
+
 // backupsRestoreHandler renders the Visszaállítás page: the restore panel, the offbox
 // restore-to-verify list and the .fab export/import loop.
 func (s *Server) backupsRestoreHandler(w http.ResponseWriter, r *http.Request) {

controller/internal/web/known_login.go

@@ -0,0 +1,41 @@
+package web
+
+import (
+	"strings"
+
+	"gitea.dooplex.hu/admin/felhom-controller/internal/stacks"
+)
+
+// ── Known default logins (v0.279.0, `09` §3 decision 45) ────────────────────────────────────────────
+//
+// "An app is never published with a login a stranger knows." Where the template's after_install replaces
+// the default with a generated password, the default is gone once that command succeeded — the page must
+// then NOT show it (it would send the household to a login that no longer works). Where it cannot (no
+// after_install) or the command failed, the page and the install dialog say plainly what the default is and
+// to change it at once. Pinned by internal/web/known_login_test.go.
+
+// defaultLoginInEffect: the template has a default login and nothing has replaced it on this install.
+// installed=false is the install dialog, before the install: a declared after_install WILL replace it.
+func defaultLoginInEffect(meta *stacks.Metadata, cfg *stacks.AppConfig, installed bool) bool {
+	if meta == nil || strings.TrimSpace(meta.AppInfo.DefaultCreds) == "" {
+		return false
+	}
+	if meta.AfterInstall == nil {
+		return true
+	}
+	if !installed {
+		return false
+	}
+	// Installed with an after_install: in effect only when the command FAILED (absent = not run yet — the
+	// deploy-done hook runs it within minutes; the page does not warn about a default it is replacing).
+	return cfg != nil && cfg.AfterInstall != nil && !cfg.AfterInstall.OK
+}
+
+// knownLoginLine is the sentence, in lang, or "" when no default login is in effect.
+func (s *Server) knownLoginLine(lang string, meta *stacks.Metadata, cfg *stacks.AppConfig, installed bool) string {
+	if !defaultLoginInEffect(meta, cfg, installed) {
+		return ""
+	}
+	creds := strings.ReplaceAll(meta.AppInfo.DefaultCreds, "DOMAIN", s.cfg.Customer.Domain)
+	return s.msgLang(lang, "app_info.known_login", creds)
+}

controller/internal/web/known_login_test.go

@@ -0,0 +1,44 @@
+package web
+
+import (
+	"testing"
+
+	"gitea.dooplex.hu/admin/felhom-controller/internal/stacks"
+)
+
+// v0.279.0 (decision 45) — when the default login is IN EFFECT, and the sentence the household reads.
+// COMPANION RED-PROOF: make defaultLoginInEffect ignore after_install (the pre-0.279.0 page: the default
+// card always shown) → the "replaced" rows fail — the page would send the household to a dead login.
+func TestKnownLogin_InEffectOnlyUntilReplaced(t *testing.T) {
+	withCreds := &stacks.Metadata{AppInfo: stacks.AppInfo{DefaultCreds: "admin / admin"}}
+	withFix := &stacks.Metadata{AppInfo: stacks.AppInfo{DefaultCreds: "admin@claper.co / claper"},
+		AfterInstall: &stacks.AfterInstallCommand{Service: "claper", Command: []string{"x"}, Success: "OK"}}
+	ok := &stacks.AppConfig{AfterInstall: &stacks.AfterInstallRecord{OK: true}}
+	failed := &stacks.AppConfig{AfterInstall: &stacks.AfterInstallRecord{OK: false}}
+	for _, c := range []struct {
+		name      string
+		meta      *stacks.Metadata
+		cfg       *stacks.AppConfig
+		installed bool
+		want      bool
+	}{
+		{"no default login", &stacks.Metadata{}, nil, false, false},
+		{"default, nothing replaces it: before install", withCreds, nil, false, true},
+		{"default, nothing replaces it: installed", withCreds, &stacks.AppConfig{}, true, true},
+		{"after_install declared: before install", withFix, nil, false, false},
+		{"after_install succeeded", withFix, ok, true, false},
+		{"after_install not run yet", withFix, &stacks.AppConfig{}, true, false},
+		{"after_install FAILED", withFix, failed, true, true},
+	} {
+		if got := defaultLoginInEffect(c.meta, c.cfg, c.installed); got != c.want {
+			t.Errorf("%s: in effect = %v, want %v", c.name, got, c.want)
+		}
+	}
+	s := testServer(t)
+	if got, want := s.knownLoginLine("hu", withCreds, nil, false), "Ez az alkalmazás egy ismert, közös jelszóval indul: admin / admin. Telepítés után azonnal változtasd meg."; got != want {
+		t.Fatalf("hu sentence %q, want %q", got, want)
+	}
+	if got, want := s.knownLoginLine("en", withFix, failed, true), "This app starts with a known, shared password: admin@claper.co / claper. Change it right after the install."; got != want {
+		t.Fatalf("en sentence %q, want %q", got, want)
+	}
+}

controller/internal/web/night_chain.go

@@ -0,0 +1,110 @@
+package web
+
+import (
+	"context"
+	"net/http"
+	"sync/atomic"
+	"time"
+)
+
+// ── R-705 (v0.279.0): "run tonight's chain now" — a debug action ─────────────────────────────────────
+//
+// The night runs four legs in ONE order (07 §6.1, 09 §6.4.2): the database/volume dump at W, the
+// second-drive copy at W+60m, the off-site copy at W+105m, and the automatic update leg chained after the
+// off-site one. Until now the only way to see that chain by day was to move the backup window and wait
+// two hours. This runs the same four legs, in the same order, one at a time, NOW. The whole-guest backup
+// (the agent's) is not part of it — it has no controller trigger (R-705 keeps that half open).
+//
+// Refused while any backup/restore op or guarded update runs, and while a chain is already running.
+
+// nightChain is the four legs; each field is a seam so the order and the refusal are testable without
+// Docker or restic. production: newNightChain(s).
+type nightChain struct {
+	dump    func(ctx context.Context) error
+	tier2   func()
+	offsite func(ctx context.Context) error // nil: no off-site target on this box
+	leg     func(ctx context.Context)
+	busy    func() (bool, string)
+	logf    func(format string, args ...interface{})
+}
+
+var nightChainRunning atomic.Bool
+
+func (s *Server) newNightChain() nightChain {
+	c := nightChain{
+		dump:  s.backupMgr.RunDBDumps,
+		tier2: s.backupMgr.RunAllTier2,
+		leg:   func(ctx context.Context) { s.stackMgr.RunUpdateLegNow(ctx, "manual-chain") },
+		logf:  s.logger.Printf,
+		busy: func() (bool, string) {
+			if s.backupMgr.IsRunning() || s.backupMgr.RestoreStatus().Running {
+				return true, "a backup or restore is running"
+			}
+			if s.stackMgr.AnyUpdating() {
+				return true, "a guarded update is running"
+			}
+			return false, ""
+		},
+	}
+	if s.backupMgr.OffboxRunnable() {
+		c.offsite = s.backupMgr.RunOffboxBackup
+	}
+	return c
+}
+
+// start refuses or launches; it reports which legs will run.
+func (c nightChain) start() (bool, string, []string) {
+	if busy, why := c.busy(); busy {
+		return false, why, nil
+	}
+	if !nightChainRunning.CompareAndSwap(false, true) {
+		return false, "the night's chain is already running", nil
+	}
+	legs := []string{"db-dump", "tier2", "offsite", "update-leg"}
+	if c.offsite == nil {
+		legs = []string{"db-dump", "tier2", "update-leg"}
+	}
+	go c.run()
+	return true, "", legs
+}
+
+func (c nightChain) run() {
+	defer nightChainRunning.Store(false)
+	ctx := context.Background()
+	t0 := time.Now()
+	step := func(name string, fn func() error) {
+		s := time.Now()
+		c.logf("[INFO] [night-chain] %s: started", name)
+		if err := fn(); err != nil {
+			c.logf("[WARN] [night-chain] %s: ended with an error after %s: %v — the chain goes on, as the night does", name, time.Since(s).Round(time.Second), err)
+			return
+		}
+		c.logf("[INFO] [night-chain] %s: done in %s", name, time.Since(s).Round(time.Second))
+	}
+	c.logf("[INFO] [night-chain] manual run of tonight's chain: dump → second drive → off-site → update leg")
+	step("db-dump", func() error { return c.dump(ctx) })
+	step("tier2", func() error { c.tier2(); return nil })
+	if c.offsite != nil {
+		step("offsite", func() error { return c.offsite(ctx) })
+	} else {
+		c.logf("[INFO] [night-chain] offsite: no off-site target on this box — skipped, as at night")
+	}
+	step("update-leg", func() error { c.leg(ctx); return nil })
+	c.logf("[INFO] [night-chain] finished in %s", time.Since(t0).Round(time.Second))
+}
+
+func (s *Server) debugRunNightChain(w http.ResponseWriter, r *http.Request) {
+	if s.backupMgr == nil || s.stackMgr == nil {
+		writeDebugJSON(w, http.StatusBadRequest, false, "Backup manager nincs konfigurálva", nil)
+		return
+	}
+	s.backupMgr.MarkManualRun()
+	ok, why, legs := s.newNightChain().start()
+	if !ok {
+		s.logger.Printf("[WARN] [night-chain] manual run REFUSED: %s", why)
+		writeDebugJSON(w, http.StatusConflict, false, "refused: "+why, nil)
+		return
+	}
+	s.logger.Printf("[INFO] [night-chain] manual run started from %s: %v", r.RemoteAddr, legs)
+	writeDebugJSON(w, http.StatusAccepted, true, "started", map[string]interface{}{"legs": legs})
+}

controller/internal/web/r705_night_chain_test.go

@@ -0,0 +1,77 @@
+package web
+
+import (
+	"context"
+	"reflect"
+	"sync"
+	"testing"
+	"time"
+)
+
+// R-705 (v0.279.0) — the manual night chain runs dump → Tier 2 → off-site → update leg, IN ORDER, one at a
+// time; it is refused while anything else runs and while a chain runs; with no off-site target it skips
+// only that leg. COMPANION RED-PROOF: swap two step calls in run() → the order assertion fails; drop the
+// busy() check in start() → the refusal assertion fails.
+func TestR705_NightChainRunsTheLegsInOrderAndRefusesWhenBusy(t *testing.T) {
+	var mu sync.Mutex
+	var order []string
+	rec := func(n string) { mu.Lock(); order = append(order, n); mu.Unlock() }
+	release := make(chan struct{})
+	done := make(chan struct{})
+	c := nightChain{
+		dump:    func(context.Context) error { rec("db-dump"); <-release; return nil },
+		tier2:   func() { rec("tier2") },
+		offsite: func(context.Context) error { rec("offsite"); return nil },
+		leg:     func(context.Context) { rec("update-leg"); close(done) },
+		busy:    func() (bool, string) { return false, "" },
+		logf:    func(string, ...interface{}) {},
+	}
+	ok, why, legs := c.start()
+	if !ok || !reflect.DeepEqual(legs, []string{"db-dump", "tier2", "offsite", "update-leg"}) {
+		t.Fatalf("start: ok=%v why=%q legs=%v", ok, why, legs)
+	}
+	// A second press while the first chain runs is refused.
+	if ok, why, _ := c.start(); ok || why != "the night's chain is already running" {
+		t.Fatalf("second start while running: ok=%v why=%q", ok, why)
+	}
+	close(release)
+	select {
+	case <-done:
+	case <-time.After(5 * time.Second):
+		t.Fatal("the chain never reached the update leg")
+	}
+	for i := 0; i < 100 && nightChainRunning.Load(); i++ {
+		time.Sleep(10 * time.Millisecond)
+	}
+	if want := []string{"db-dump", "tier2", "offsite", "update-leg"}; !reflect.DeepEqual(order, want) {
+		t.Fatalf("order %v, want %v", order, want)
+	}
+
+	// Busy: refused, nothing runs.
+	order = nil
+	c.busy = func() (bool, string) { return true, "a guarded update is running" }
+	if ok, why, _ := c.start(); ok || why != "a guarded update is running" {
+		t.Fatalf("busy start: ok=%v why=%q", ok, why)
+	}
+	time.Sleep(50 * time.Millisecond)
+	if len(order) != 0 {
+		t.Fatalf("a refused chain ran legs: %v", order)
+	}
+
+	// No off-site target: that leg alone is skipped.
+	c.busy = func() (bool, string) { return false, "" }
+	c.offsite = nil
+	c.dump = func(context.Context) error { rec("db-dump"); return nil }
+	done2 := make(chan struct{})
+	c.leg = func(context.Context) { rec("update-leg"); close(done2) }
+	if ok, _, legs := c.start(); !ok || !reflect.DeepEqual(legs, []string{"db-dump", "tier2", "update-leg"}) {
+		t.Fatalf("no-offsite start: ok=%v legs=%v", ok, legs)
+	}
+	<-done2
+	for i := 0; i < 100 && nightChainRunning.Load(); i++ {
+		time.Sleep(10 * time.Millisecond)
+	}
+	if want := []string{"db-dump", "tier2", "update-leg"}; !reflect.DeepEqual(order, want) {
+		t.Fatalf("no-offsite order %v, want %v", order, want)
+	}
+}

controller/internal/web/r_partd_hollow_page_test.go

@@ -0,0 +1,29 @@
+package web
+
+import (
+	"strings"
+	"testing"
+	"time"
+
+	"gitea.dooplex.hu/admin/felhom-controller/internal/backup"
+)
+
+// Part D (v0.279.0) — the household sees the sentence on the REAL backup page (ServeHTTP → template), in
+// Hungarian by default, and the page is silent when nothing is flagged (negative control).
+// COMPANION RED-PROOF: drop `data["HollowCopyLines"]` from backupsAppsHandler → the sentence is absent.
+func TestPartD_TheBackupPageSaysARunningAppHasNoData(t *testing.T) {
+	s := newDashboardServer(t, time.Time{})
+	if s.backupMgr == nil {
+		t.Fatal("fixture has no backup manager")
+	}
+	quiet := getPage(t, s, "/backups/apps")
+	if quiet.Code != 200 || strings.Contains(quiet.Body.String(), "nem tartalmaz adatot") {
+		t.Fatalf("with nothing flagged the page must be silent (code %d)", quiet.Code)
+	}
+	s.backupMgr.FlagHollowCopyForTest("cloudapp", backup.HollowTierOffsite)
+	rec := getPage(t, s, "/backups/apps")
+	body := rec.Body.String()
+	if rec.Code != 200 || !strings.Contains(body, "A(z) cloudapp fut, de a legutóbbi távoli mentése nem tartalmaz adatot") {
+		t.Fatalf("the flagged app's sentence is not on the page (code %d)", rec.Code)
+	}
+}

controller/internal/web/templates/app_info.html

@@ -217,11 +217,11 @@ function appMigrate(btn,app,label){
     </div>
     {{end}}
 
-    {{if .AppInfo.DefaultCreds}}
+    {{if and .AppInfo.DefaultCreds (not .DefaultLoginReplaced)}}
     <div class="app-info-card">
         <h3>{{T "app_info.alapertelmezett_belepes"}}</h3>
         <p class="app-info-creds">{{.AppInfo.DefaultCreds}}</p>
-        <p class="app-info-creds-warn">{{T "app_info.az_elso_bejelentkezes_utan_azonnal_2"}}</p>
+        {{if .KnownLoginLine}}<p class="app-info-creds-warn" id="known-login-line">{{.KnownLoginLine}}</p>{{else}}<p class="app-info-creds-warn">{{T "app_info.az_elso_bejelentkezes_utan_azonnal_2"}}</p>{{end}}
     </div>
     {{end}}
 

controller/internal/web/templates/backups_apps.html

@@ -8,6 +8,11 @@
 
 {{template "backups_flash" .}}
 {{template "restore_banner" .}}
+{{- if .HollowCopyLines}}
+<div class="alert alert-error" style="margin-bottom:1.5rem">
+    {{range .HollowCopyLines}}<div>{{.}}</div>{{end}}
+</div>
+{{- end}}
 
 {{if not .Backup}}
 {{template "backups_empty" .}}

controller/internal/web/templates/debug.html

@@ -79,6 +79,8 @@
 
             <button class="btn btn-secondary btn-sm" id="btn-crossdrive" data-label="{{T "debug.csak_cross_drive"}}" onclick="triggerAction('btn-crossdrive','/api/debug/backup/crossdrive','POST')">{{T "debug.csak_cross_drive"}}</button>
             <span class="debug-result" id="btn-crossdrive-result"></span>
+            <button class="btn btn-secondary btn-sm" id="btn-nightchain" data-label="{{T "debug.night_chain"}}" onclick="triggerAction('btn-nightchain','/api/debug/backup/night-chain','POST')">{{T "debug.night_chain"}}</button>
+            <span class="debug-result" id="btn-nightchain-result"></span>
 
             <button class="btn btn-secondary btn-sm" id="btn-integrity" data-label="{{T "debug.restic_integritas"}}" onclick="triggerAction('btn-integrity','/api/debug/backup/integrity','POST')">{{T "debug.restic_integritas"}}</button>
             <span class="debug-result" id="btn-integrity-result"></span>

controller/internal/web/templates/deploy.html

@@ -25,6 +25,7 @@
 <div class="deploy-container">
     {{if .FlashSuccess}}<div class="flash flash-success">{{.FlashSuccess}}</div>{{end}}
     {{if .FlashError}}<div class="flash flash-error">{{.FlashError}}</div>{{end}}
+    {{- if .KnownLoginLine}}<div class="flash flash-error" id="known-login-line">{{.KnownLoginLine}}</div>{{end}}
     <div class="deploy-info">
         <img class="deploy-logo" src="{{.LogoURL}}" alt="" data-fallback="/static/app-placeholder.svg"
              onerror="if(!this.dataset.step){this.dataset.step='1';this.src='{{.LogoPNGURL}}';}else if(this.dataset.fallback&&this.dataset.step==='1'){this.dataset.step='2';this.src=this.dataset.fallback;}else{this.onerror=null;this.style.visibility='hidden';}">
@@ -674,7 +675,7 @@
 <script>
 var postDeployInfo = {
     firstSteps: {{json .Meta.AppInfo.FirstSteps}},
-    defaultCreds: {{json .Meta.AppInfo.DefaultCreds}},
+    defaultCreds: {{if .Meta.AfterInstall}}""{{else}}{{json .Meta.AppInfo.DefaultCreds}}{{end}},
     docsURL: {{json .Meta.AppInfo.DocsURL}},
     domain: {{json .Domain}},
     displayName: {{json .Meta.DisplayName}},

controller/internal/web/testdata/i18n_parity/debug.html

@@ -245,6 +245,8 @@
 
             <button class="btn btn-secondary btn-sm" id="btn-crossdrive" data-label="Csak cross-drive" onclick="triggerAction('btn-crossdrive','/api/debug/backup/crossdrive','POST')">Csak cross-drive</button>
             <span class="debug-result" id="btn-crossdrive-result"></span>
+            <button class="btn btn-secondary btn-sm" id="btn-nightchain" data-label="Az éjszakai lánc most (mentés → 2. meghajtó → távoli → frissítés)" onclick="triggerAction('btn-nightchain','/api/debug/backup/night-chain','POST')">Az éjszakai lánc most (mentés → 2. meghajtó → távoli → frissítés)</button>
+            <span class="debug-result" id="btn-nightchain-result"></span>
 
             <button class="btn btn-secondary btn-sm" id="btn-integrity" data-label="Restic integritás" onclick="triggerAction('btn-integrity','/api/debug/backup/integrity','POST')">Restic integritás</button>
             <span class="debug-result" id="btn-integrity-result"></span>

controller/scripts/i18n_go_keys.json

@@ -91,6 +91,9 @@
     "kept.backup.none": "BORN AS A KEY, kept-data release (09 3 decision 36, Part E) -- a NEW sentence, never a Go literal. Pinned by internal/api/kept_install_test.go / internal/stacks/kept_test.go / internal/web/kept_fb_test.go.",
     "kept.backup.own": "BORN AS A KEY, kept-data release (09 3 decision 36, Part E) -- a NEW sentence, never a Go literal. Pinned by internal/api/kept_install_test.go / internal/stacks/kept_test.go / internal/web/kept_fb_test.go.",
     "kept.backup.second": "BORN AS A KEY, kept-data release (09 3 decision 36, Part E) -- a NEW sentence, never a Go literal. Pinned by internal/api/kept_install_test.go / internal/stacks/kept_test.go / internal/web/kept_fb_test.go.",
+    "app_info.known_login": "BORN AS A KEY, v0.279.0 (09 decision 45 / Part D) -- a NEW sentence, never a Go literal. Pinned by internal/web/known_login_test.go / internal/web/r_partd_hollow_page_test.go.",
+    "backups_apps.hollow_local": "BORN AS A KEY, v0.279.0 (09 decision 45 / Part D) -- a NEW sentence, never a Go literal. Pinned by internal/web/known_login_test.go / internal/web/r_partd_hollow_page_test.go.",
+    "backups_apps.hollow_offsite": "BORN AS A KEY, v0.279.0 (09 decision 45 / Part D) -- a NEW sentence, never a Go literal. Pinned by internal/web/known_login_test.go / internal/web/r_partd_hollow_page_test.go.",
     "err.kept.offsite_not_usable": "BORN AS A KEY, R-691 (2) (v0.277.0) -- a NEW sentence, never a Go literal. Pinned by internal/api/kept_install_test.go TestR691_InstallChoiceNamesTheOffsiteCopy / internal/backup/r691_kept_offsite_test.go.",
     "err.kept.offsite_version_unknown": "BORN AS A KEY, R-691 (2) (v0.277.0) -- a NEW sentence, never a Go literal. Pinned by internal/api/kept_install_test.go TestR691_InstallChoiceNamesTheOffsiteCopy / internal/backup/r691_kept_offsite_test.go.",
     "kept.backup.offsite": "BORN AS A KEY, R-691 (2) (v0.277.0) -- a NEW sentence, never a Go literal. Pinned by internal/api/kept_install_test.go TestR691_InstallChoiceNamesTheOffsiteCopy / internal/backup/r691_kept_offsite_test.go.",