v0.308.0: controller batch 2026-10-12 — clear-address warning (R-922), secret sweep over every page (R-255), read_failed (R-266), no NVMe heat band (R-333), share globe (R-577), Hungarian dates and numbers (R-562), lost-drive option pinned (R-521)

Operator rulings 2026-10-12, 09 §3 decisions 196, 204-207, 223, 227. MinAgent 0.131.0 unchanged.
R-255's sweep found one leak, fixed here: an optional-config secret_input was rendered into its
settings page; it is now revealed on demand. Hungarian parity fixtures re-captured once for R-562.

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

controller/internal/web/templates/settings_notifications.html

@@ -12,7 +12,11 @@
         {{if .NotificationSuccess}}<div class="alert alert-info">{{.NotificationSuccess}}</div>{{end}}
         {{if .NotificationError}}<div class="alert alert-error">{{.NotificationError}}</div>{{end}}
         <form method="POST" action="/settings/notifications">
-            {{.CSRFField}}
+            {{.CSRFField}}{{if .NotificationClearConfirm}}
+            <div class="alert alert-warning" id="notification-clear-warning">
+                <p>{{T "settings_notifications.clear_warning"}}</p>
+                <button type="submit" name="confirm_clear" value="1" class="btn btn-danger">{{T "settings_notifications.clear_confirm"}}</button>
+            </div>{{end}}
             <div class="form-group">
                 <label for="notification_email">{{T "settings_notifications.e_mail_cim"}}</label>
                 <input type="email" id="notification_email" name="notification_email"