D47 / R-1269 (P2): a new install never writes into an earlier install's backup — every install has an identity (install_id), the unit records it, every unit writer asks first; another install's unit is set aside whole (backups/set-aside/<app>/<stamp>, a D25 kept copy, „Visszaállítás” + „Eltávolítás” on the restore page); a move that fails refuses the write. Red-proved. Commit only.

controller/internal/web/templates/backups_restore.html

@@ -173,7 +173,14 @@
     <p class="form-hint" style="margin-bottom:.75rem">{{T "backups_restore.megorzott_masolatok_hint"}}</p>
     <div class="app-row-list">
         {{range .KeptCopies}}
-        {{template "app_list_row" dict "Slug" "" "Name" .Source "Secondary" (printf "%s · %s · %s" .Line (numText .SizeHuman) (fmtTimeStr .Since))}}
+        {{template "app_list_row" dict "Slug" "" "Name" .Source "Secondary" (printf "%s · %s · %s" .Line (numText .SizeHuman) (fmtTimeStr .Since))}}{{if .Restorable}}
+            <form method="POST" action="/backup/kept/restore" style="display:inline">
+                {{$.CSRFField}}
+                <input type="hidden" name="id" value="{{.ID}}">
+                <input type="hidden" name="confirm" value="1">
+                <button type="button" class="btn btn-xs btn-outline"
+                        onclick="confirmRestoreKeptUnit(this)">{{T "backups_restore.visszaallitas"}}</button>
+            </form>{{end}}
             <form method="POST" action="/backup/kept/remove" style="display:inline">
                 {{$.CSRFField}}
                 <input type="hidden" name="id" value="{{.ID}}">
@@ -185,7 +192,13 @@
         {{end}}
     </div>
     <script>
-function confirmRemoveKeptCopy(btn){
+{{if .KeptUnitRestorable}}function confirmRestoreKeptUnit(btn){
+    felhomConfirm(btn, '{{T "backups_restore.megorzott_visszaallitas_megerosites"}}', function(){
+        var f = btn.closest('form');
+        if (f) { if (f.requestSubmit) f.requestSubmit(); else f.submit(); }
+    });
+}
+{{end}}function confirmRemoveKeptCopy(btn){
     felhomConfirm(btn, '{{T "backups_restore.megorzott_eltavolitas_megerosites"}}', function(){
         var f = btn.closest('form');
         if (f) { if (f.requestSubmit) f.requestSubmit(); else f.submit(); }