feat(decodes): offer the panel as a Main-view pane

It joins the left/right dropdowns in Settings -> General alongside the maps,
the cluster and the rest, so decodes can sit beside the entry strip instead
of only behind a tab. Per-profile like the other pane choices.

The panel itself is now built in ONE place and rendered from both: two
copies of that call would be two sets of props to keep in step, and the
click handler in particular is not something to duplicate.

The status refresh follows. Its "is anything showing a spot status?" test
decides whether a logged QSO refreshes the NEW badges now or only marks
them dirty, and a panel that had become a pane would have gone on wearing
stale badges whenever it was shown that way rather than as a tab.

frontend/src/lib/i18n.tsx

@@ -105,7 +105,7 @@ const en: Dict = {
   'settings.leftPane': 'Left pane', 'settings.rightPane': 'Right pane',
   'settings.pane.map1': 'Map — great-circle + beam', 'settings.pane.map2': 'Map — locator (street)',
   'settings.pane.cluster': 'Cluster spots', 'settings.pane.worked': 'Worked before',
-  'settings.pane.recent': 'Recent QSOs', 'settings.pane.netcontrol': 'Net control',
+  'settings.pane.recent': 'Recent QSOs', 'settings.pane.netcontrol': 'Net control', 'settings.pane.decodes': 'FT decodes',
   'settings.pane.flex': 'Flex Console', 'settings.pane.icom': 'Icom Console', 'settings.pane.yaesu': 'Yaesu Console', 'yaesu.notConnected': 'Yaesu CAT not connected', 'yaesu.meters': 'Meters', 'yaesu.bandMode': 'Band & mode', 'yaesu.receive': 'Receive', 'yaesu.noiseFilter': 'Noise & filter', 'yaesu.transmit': 'Transmit', 'yaesu.refresh': 'Refresh', 'yaesu.tuneHint': 'Start an antenna-tuner cycle', 'yaesu.sToRst': 'Click to fill the RST sent', 'yaesu.sidebandHint': 'Click to select this mode; click again to switch sideband (U/L)', 'yaesu.splitUpHint': 'Transmit this far above the receive frequency, and turn split on', 'yaesu.txOn': 'TX', 'yaesu.cw': 'CW', 'yaesu.breakInHint': 'Break-in: the rig switches to receive between characters', 'yaesu.zinHint': 'Zero-in: retune so the station you hear lands on your CW pitch',
   'theme.auto': 'Auto (system)', 'theme.light-warm': 'Warm light', 'theme.light-cool': 'Cool light',
   'theme.light-sage': 'Sage light', 'theme.light-nordic': 'Nordic light', 'theme.sahara': 'Sahara', 'theme.dim-slate': 'Dim slate', 'theme.dark-warm': 'Warm dark',
@@ -579,7 +579,7 @@ const fr: Dict = {
   'settings.leftPane': 'Volet gauche', 'settings.rightPane': 'Volet droit',
   'settings.pane.map1': 'Carte — orthodromie + faisceau', 'settings.pane.map2': 'Carte — locator (rue)',
   'settings.pane.cluster': 'Spots cluster', 'settings.pane.worked': 'Déjà contactés',
-  'settings.pane.recent': 'QSO récents', 'settings.pane.netcontrol': 'Gestion de net',
+  'settings.pane.recent': 'QSO récents', 'settings.pane.netcontrol': 'Gestion de net', 'settings.pane.decodes': 'Decodes FT',
   'settings.pane.flex': 'Flex Console', 'settings.pane.icom': 'Icom Console', 'settings.pane.yaesu': 'Yaesu Console', 'yaesu.notConnected': 'CAT Yaesu non connecté', 'yaesu.meters': 'Mesures', 'yaesu.bandMode': 'Bande et mode', 'yaesu.receive': 'Réception', 'yaesu.noiseFilter': 'Bruit et filtre', 'yaesu.transmit': 'Émission', 'yaesu.refresh': 'Actualiser', 'yaesu.tuneHint': "Lancer un cycle d'accord d'antenne", 'yaesu.sToRst': 'Cliquer pour remplir le RST envoyé', 'yaesu.sidebandHint': 'Cliquer pour choisir ce mode ; recliquer pour changer de bande latérale (U/L)', 'yaesu.splitUpHint': "Émettre à cette distance au-dessus de la fréquence de réception, et activer le split", 'yaesu.txOn': 'TX', 'yaesu.cw': 'CW', 'yaesu.breakInHint': "Break-in : la radio repasse en réception entre les caractères", 'yaesu.zinHint': "Zéro-in : réaccorde pour que la station entendue tombe sur votre note CW",
   'theme.auto': 'Auto (système)', 'theme.light-warm': 'Clair chaud', 'theme.light-cool': 'Clair froid',
   'theme.light-sage': 'Clair sauge', 'theme.light-nordic': 'Clair nordique', 'theme.sahara': 'Sahara', 'theme.dim-slate': 'Ardoise tamisé', 'theme.dark-warm': 'Sombre chaud',