R-1278: the install page says when a backup of an earlier install is kept and links the restore page (HU and EN). Red-proved. Commit only.

controller/internal/web/handlers.go

@@ -531,9 +531,11 @@ func (s *Server) deployPageData(w http.ResponseWriter, r *http.Request, name str
 	data["RestoreRecordedAddress"] = ""
 	data["RestoreRecordedDeclaresPath"] = declaresDataPath
 	data["RestoreHasRecord"] = false
+	data["KeptBackups"] = 0 // R-1278: backups of an earlier install the box keeps (set-aside or removed-app units)
 	// Part 1's visibility line needs the real path, not a literal in a template.
 	data["SystemDataPath"] = s.cfg.Paths.SystemDataPath
 	if !alreadyDeployed && s.backupMgr != nil {
+		data["KeptBackups"] = s.backupMgr.KeptBackupsFor(name)
 		if place, addr, ok := s.backupMgr.RecordedUnitForStack(name); ok {
 			prefill := map[string]string{}
 			if addr.Known() {

controller/internal/web/i18n_cases_a_test.go

@@ -181,6 +181,12 @@ func i18nCasesA() []i18nCase {
 		{"deploy_new", "deploy", func() map[string]interface{} {
 			return i18nDeployData(false, stacks.StateNotDeployed, 1)
 		}},
+		// R-1278 (2026-10-25 night): a backup of an earlier install is kept — the install page says so.
+		{"deploy_new_kept_backup_r1278", "deploy", func() map[string]interface{} {
+			d := i18nDeployData(false, stacks.StateNotDeployed, 1)
+			d["KeptBackups"] = 1
+			return d
+		}},
 		// R-1125 (v0.327.0, D10 = A): this page shows the same memory sentence — re-captured under this name.
 		{"deploy_new_blocked_r1125", "deploy", func() map[string]interface{} {
 			return i18nDeployData(false, stacks.StateNotDeployed, 2)

controller/internal/web/r1278_kept_backup_offer_test.go

@@ -0,0 +1,36 @@
+package web
+
+import (
+	"os"
+	"strings"
+	"testing"
+)
+
+// R-1278: a volume app's reinstall said nothing about the backup of the earlier install the box keeps (set aside by
+// D47, or left by „remove — keep backups"). The install page now says the install starts empty and links the restore
+// page. One render per branch of the gate (the template-gate rule): kept + not installed → shown; none → not shown;
+// installed → not shown.
+// RED-PROOF: delete the {{if .KeptBackups}} block → the first case fails.
+func TestR1278_TheInstallPageOffersTheKeptBackup(t *testing.T) {
+	shown := renderDeployWithFields(t, false, map[string]interface{}{"KeptBackups": 2})
+	if !strings.Contains(shown, `data-kept-backups="2"`) || !strings.Contains(shown, `href="/backups/restore"`) {
+		t.Fatal("with a kept backup of an earlier install the page must say so and link the restore page")
+	}
+	if strings.Contains(renderDeployWithFields(t, false, map[string]interface{}{"KeptBackups": 0}), "kept-backup-offer") {
+		t.Fatal("no kept backup → no notice")
+	}
+	if strings.Contains(renderDeployWithFields(t, false, map[string]interface{}{"KeptBackups": 1, "AlreadyDeployed": true}), "kept-backup-offer") {
+		t.Fatal("an installed app shows no install-time notice")
+	}
+}
+
+// The page reads the count from the backup manager (seam-built-but-never-wired is a recorded class).
+func TestR1278_TheDeployPageAsksTheBackupManager(t *testing.T) {
+	b, err := os.ReadFile("handlers.go")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(string(b), `data["KeptBackups"] = s.backupMgr.KeptBackupsFor(name)`) {
+		t.Fatal("deployPageData must set KeptBackups from the backup manager")
+	}
+}

controller/internal/web/templates/deploy.html

@@ -78,6 +78,15 @@
             {{T "deploy.ha_most_mashova_szeretned_telepiteni"}}
         </div>
         {{end}}
+        {{- if and (not .AlreadyDeployed) .KeptBackups}}{{/* R-1278: a backup of an earlier install is kept (set aside, D47,
+             or left by „remove — keep backups"). The install starts empty; the backup is loaded afterwards on the
+             restore page („Megőrzött másolatok"). */}}
+        <div class="alert alert-info kept-backup-offer" data-kept-backups="{{.KeptBackups}}">
+            <svg class="ico ico-sm"><use href="#i-info"/></svg>
+            {{T "deploy.kept_backup_offer"}}
+            <a href="/backups/restore" class="alert-link">{{T "deploy.kept_backup_offer_link"}}</a>
+        </div>
+        {{- end}}
         {{/* R-351 / Part 1 — WHERE THE DATA WILL LIVE, before the button is pressed. Measured
              2026-08-21: 13 of 53 catalog templates declare a storage field; the other 40 have none and
              their data goes to the system drive, which no screen said. This states it. It changes no