v0.246.0: an interrupted restore is told; the recovery-code reminder waits until the box can take it

MinAgent: 0.131.0 (unchanged). Requires hub v0.117.0 for restore_interrupted.

R-550 (operator ruling: fix). A design reversed and recorded: the restore
op-status was in memory by choice. Now restore-status.json in DataDir, written
atomically at both ends of an op. At startup a record still marked running
becomes a failed, interrupted result kept per app until that app's next
restore, shown on /backups/restore and the off-site wizard, and raised once as
restore_interrupted. Cooldowns stay in memory.

R-546. The R-543 reminder bar consults the agent's own preflight ok (every
blocking item, not a copy of pbs_storage_id), cached 60 s, probed only while
paused. /backup/escrow shows a waiting card that polls and reloads instead of
red crosses and English diagnostics. POST /api/escrow/start refuses 409 before
staging or starting - the direct path chaos night used. Unknown readiness keeps
the bar.

Red-proofs (each seen failing): restore record across restart; main() calls
both startup functions; startup helper with loading skipped; restore page card;
bar held back; waiting card; start refusal. go build/vet/test ./... green, 28
packages; controller_gates --fast all OK.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/web/templates/backups_escrow.html

@@ -13,7 +13,27 @@
     <span class="domain-badge">{{.Domain}}</span>
 </div>
 
-{{if not .AgentSupported}}
+{{if .EscrowNotReady}}
+<!-- R-546: the box cannot run the ceremony yet (the agent's own preflight is not ok — typically the
+     first minutes after a bind, before the PBS storage is applied). No checklist of red crosses, no
+     start form that would refuse, none of the agent's raw diagnostics: one sentence, and the page
+     polls and reloads itself when the agent says ready. -->
+<div class="settings-card" id="escrow-not-ready">
+    <div class="alert alert-info">{{.EscrowNotReadyMessage}}</div>
+    <p class="form-hint">Ehhez nem kell semmit tenned. Ha fél óra múlva is ezt látod, szólj az üzemeltetőnek.</p>
+</div>
+<script>
+(function(){
+  function check(){
+    fetch('/api/escrow/preflight',{headers:{'Accept':'application/json'}})
+      .then(function(r){ return r.json(); })
+      .then(function(j){ if(j && j.data && j.data.ok){ window.location.reload(); } })
+      .catch(function(){});
+  }
+  setInterval(check, 20000);
+})();
+</script>
+{{else if not .AgentSupported}}
 <div class="alert alert-info">A funkcióhoz az ügynök frissítése szükséges — a frissítés automatikusan megérkezik. Próbálja újra később.</div>
 {{else}}