feat(elecraft): a K3/K4 console — power, volume, S-meter, SWR, MOX, tune

The Elecraft backend already existed; what was missing was somewhere to
operate the radio from. This adds the panel, on the Kenwood-dialect
client the K3 already speaks, in a tab of its own beside the Yaesu and
Icom consoles.

Scope is the six controls asked for and nothing else. Every extra command
added without a radio to test it against is a control that may or may not
do what its label says, and a K3 exposes dozens.

No K3 was available while writing this, so the two halves are treated
differently. The setters are the commands the reference documents
unambiguously and whose effect is visible and reversible (PC, AG,
TX/RX). The meters are the opposite: their scaling differs by model and
firmware, so the raw answers are logged next to the power setting, the
panel says the scaling is provisional, and an unmeasured SWR shows as
'—' rather than as a perfect 1.0 — a good match on an antenna nobody
measured is the reading that costs a radio.

ATU tune sends SWT20 (the K3 front-panel tap) and logs exactly what it
sent, so a wrong mapping names itself instead of leaving an operator
guessing which button OpsLog pressed.

changelog.json

@@ -5,12 +5,14 @@
     "en": [
       "Withdrawing deleted QSOs from Club Log is now paced and capped at 25 per deletion. Their delete endpoint is a real-time one, meant for an operator removing a contact they just mis-logged; Club Log watches the rate and blocks the IP of anything that batches through it. Past the cap OpsLog stops and says so — there is no bulk-delete API, and hundreds of removals belong on clublog.org, which has a tool for it.",
       "Auto-call, withdrawn earlier, is now disarmed where it was remembered: a stored 'enabled' is switched off and written back the first time OpsLog reads it. The running guard already stopped this build from calling anyone, but the stored flag survived — and any build without that guard would key the transmitter for a feature with no switch left to turn it off.",
-      "When TQSL refuses an upload, the log now carries the exact ADIF record it was given and the station location it was told to sign with. 'No QSOs processed' covers several unrelated causes and the temp file is deleted the moment TQSL returns, so the one piece of evidence that mattered was the one nobody could see."
+      "When TQSL refuses an upload, the log now carries the exact ADIF record it was given and the station location it was told to sign with. 'No QSOs processed' covers several unrelated causes and the temp file is deleted the moment TQSL returns, so the one piece of evidence that mattered was the one nobody could see.",
+      "An Elecraft console for the K3/K4: power, volume, S-meter, SWR, MOX and an ATU tune, in a tab of its own when the CAT backend is Elecraft or Kenwood. The meter scaling is marked provisional and the raw readings go to the log — it was written from the K3 Programmer's Reference without a radio to hand, and a wrongly scaled SWR bar reports a good match on a bad antenna."
     ],
     "fr": [
       "Le retrait des QSO supprimés chez Club Log est désormais cadencé et limité à 25 par suppression. Leur point d'entrée de suppression est temps réel, prévu pour un opérateur qui retire un contact qu'il vient de mal enregistrer ; Club Log surveille le rythme et bloque l'IP de ce qui passe des lots par là. Au-delà de la limite, OpsLog s'arrête et le dit — il n'existe pas d'API de suppression en masse, et des centaines de retraits se font sur clublog.org, qui a l'outil pour ça.",
       "L'appel automatique, retiré précédemment, est maintenant désarmé là où il était mémorisé : un « activé » enregistré est éteint et réécrit dès la première lecture par OpsLog. Le garde-fou à l'exécution empêchait déjà cette version d'appeler qui que ce soit, mais l'indicateur enregistré survivait — et toute version sans ce garde-fou passait à l'émission pour une fonction dont il ne reste aucun interrupteur.",
-      "Quand TQSL refuse un envoi, le journal contient désormais l'enregistrement ADIF exact qui lui a été remis et l'emplacement de station demandé pour la signature. « No QSOs processed » recouvre plusieurs causes sans rapport et le fichier temporaire est supprimé dès que TQSL rend la main : la seule pièce à conviction utile était justement invisible."
+      "Quand TQSL refuse un envoi, le journal contient désormais l'enregistrement ADIF exact qui lui a été remis et l'emplacement de station demandé pour la signature. « No QSOs processed » recouvre plusieurs causes sans rapport et le fichier temporaire est supprimé dès que TQSL rend la main : la seule pièce à conviction utile était justement invisible.",
+      "Une console Elecraft pour les K3/K4 : puissance, volume, S-mètre, ROS, MOX et accord de l'ATU, dans un onglet dédié quand le CAT est réglé sur Elecraft ou Kenwood. L'échelle des mesures est signalée comme provisoire et les valeurs brutes partent dans le journal — la console a été écrite d'après le manuel de programmation du K3, sans radio sous la main, et une barre de ROS mal calibrée annonce un bon accord sur une mauvaise antenne."
     ]
   },
   {