feat(relays): follow the entry Band selector when there is no CAT link

Relay automatic control and the band-change outbound rows both hang off the rig
state, which is right when there IS a rig: changing Band in the entry strip
pushes a QSY, the new state comes back through the CAT callback, and the relays
follow from there — which is why this works for anyone with rig control.

Without a CAT connection nothing is pushed and nothing comes back, so a station
whose rig OpsLog does not control changed band and the antenna switch sat
exactly where it was. Reported as automatic control not working; it was never
told the band had changed.

The entry selector now says so itself, but only when the CAT push did not
happen, and never when the band or frequency lock is on: a lock means the entry
is deliberately decoupled from the rig, and moving an antenna to match a contact
logged from last year is worse than doing nothing.

The frequency is passed as unknown on that path — a band selector gives a band
and nothing else, and rules written on a frequency RANGE are left alone rather
than evaluated against a made-up dial reading.

The de-duplication of "is this a new band" is now shared by both sources, so a
station that has both does not command its switch twice for one QSY.

Also: the same credit line as the QSL e-mail now closes the default recording
e-mail body, on the same terms — a default in the template, so a stored one is
untouched.

changelog.json

@@ -5,12 +5,14 @@
     "en": [
       "Right-click: update the US county of the selected contacts from the ULS database, replacing a county since renamed or abolished.",
       "A QSO logged from WSJT-X, MSHV or a net now appears in Recent QSOs at once, instead of waiting for a delayed auto-upload to send it.",
-      "New installs: the default QSL e-mail ends with a credit line and a link to OpsLog. It is part of the template, so delete it if you'd rather not."
+      "New installs: the default QSL and recording e-mails end with a credit line and a link to OpsLog. Part of the template, so delete it if unwanted.",
+      "Relay automatic control and band-change messages now follow the Band selector too, so a station without CAT switches its antenna when you change band."
     ],
     "fr": [
       "Clic droit : mettre à jour le comté US des contacts sélectionnés depuis la base ULS, pour remplacer un comté renommé ou supprimé.",
       "Un QSO logué depuis WSJT-X, MSHV ou un net apparaît aussitôt dans les QSO récents, sans attendre l’envoi d’un upload automatique différé.",
-      "Nouvelles installations : le mail QSL par défaut se termine par une ligne de crédit et un lien vers OpsLog. Elle fait partie du modèle, supprimable."
+      "Nouvelles installations : les mails QSL et enregistrement par défaut finissent par une ligne de crédit et un lien vers OpsLog. Dans le modèle, supprimable.",
+      "Le contrôle automatique des relais et les messages de changement de bande suivent aussi le champ Band : une station sans CAT commute enfin son antenne."
     ]
   },
   {