controller (unreleased): R-921 check-first pre-check (no stop while another tier's job is in flight); R-922 email_cleared on a household's deliberate clear

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

controller/internal/notify/notifier.go

@@ -1029,11 +1029,16 @@ type preferencesRequest struct {
 	Email         string   `json:"email"`
 	EnabledEvents []string `json:"enabled_events"`
 	CooldownHours int      `json:"cooldown_hours,omitempty"`
+	// EmailCleared (R-922): the household deliberately cleared its address — the hub deletes the one it
+	// holds. OMITTED unless true: an empty address without it keeps the hub's no-clobber guard (an
+	// unconfigured box must never wipe a seeded address). Decoded by the hub's savePreferences.
+	EmailCleared bool `json:"email_cleared,omitempty"`
 }
 
 // SyncPreferences pushes the current notification preferences to the hub.
 // Synchronous — returns error for the handler to display to the user.
-func (n *Notifier) SyncPreferences(email string, enabledEvents []string, cooldownHours int) error {
+// emailCleared (R-922) is settings.NotificationPrefs.EmailCleared — true only after a household's clear.
+func (n *Notifier) SyncPreferences(email string, enabledEvents []string, cooldownHours int, emailCleared bool) error {
 	if !n.enabled {
 		return util.MsgError("err.notify.hub_nem_konfiguralt")
 	}
@@ -1043,6 +1048,7 @@ func (n *Notifier) SyncPreferences(email string, enabledEvents []string, cooldow
 		Email:         email,
 		EnabledEvents: enabledEvents,
 		CooldownHours: cooldownHours,
+		EmailCleared:  emailCleared,
 	}
 
 	jsonData, err := json.Marshal(payload)
@@ -1076,7 +1082,7 @@ func (n *Notifier) SyncPreferences(email string, enabledEvents []string, cooldow
 	if n.debug {
 		n.logger.Printf("[DEBUG] SyncPreferences: response HTTP %d", resp.StatusCode)
 	}
-	n.logger.Printf("[INFO] Notification preferences synced to hub: email=%s, events=%v, cooldown=%dh", email, enabledEvents, cooldownHours)
+	n.logger.Printf("[INFO] Notification preferences synced to hub: email=%s, events=%v, cooldown=%dh, email_cleared=%t", email, enabledEvents, cooldownHours, emailCleared)
 	return nil
 }