refactor(decodes): read the list the way DXHunter's reads

Compared side by side, DXHunter's decode list is plainly easier to read,
and three things account for the gap.

The Call column repeated what the message already said. Every FT8 line
opens with the callsigns — "CQ A93MO LL56", "PG5FRL JH3CUL PM74" — so a
column in front of it printed the same token twice and pushed the line
everyone actually reads to the middle of the row. It is gone; the message
is the identity, and the tokens worth finding are picked out inside it:
green for CQ and for our own call when someone answers, red for the station
we are calling. The grid went with it, being the message's last token.

Time is on every row now, compact, no separators. A decode belongs to a
period and the section heading names it — but once a slot runs past a
screenful the heading is somewhere above, and an instant you cannot read
where the decode is is not an instant you have.

Band and mode became their own columns, band as a chip, and the status
flags moved into one column at the right edge with LoTW and a "worked"
marker beside them. Rows are tighter: 13 px for the message and the report,
11 px for the figures, 10 px for the badges, and the column rules run
through the lot.

frontend/src/lib/i18n.tsx

@@ -136,7 +136,7 @@ const en: Dict = {
   'dec.colFreq': 'Freq', 'dec.colFreqTitle': 'Audio offset inside the passband (Hz)',
   'dec.txNow': 'Transmitting', 'dec.txIdle': 'Transmit', 'dec.working': 'calling', 'dec.toYou': 'to you',
   'dec.txUnknown': 'this application does not report its transmit text',
-  'dec.colCall': 'Call', 'dec.colSnr': 'SNR', 'dec.colGrid': 'Grid', 'dec.colMsg': 'Message', 'dec.colFlags': 'New', 'dec.colCountry': 'Country',
+  'dec.colTime': 'Time', 'dec.colSnr': 'SNR', 'dec.colMsg': 'Message', 'dec.colCountry': 'Country', 'dec.colBand': 'Band', 'dec.colMode': 'Mode', 'dec.colStatus': 'Status', 'dec.wkd': 'Wkd',
   'dec.bgPota': 'POTA', 'dec.bgGrid': 'GRID', 'dec.bgPfx': 'PFX', 'dec.bgCounty': 'CTY',
   'dec.stNew': 'NEW', 'dec.stBand': 'BAND', 'dec.stMode': 'MODE', 'dec.stSlot': 'SLOT', 'dec.stCall': 'CALL',
   'dec.empty': 'Nothing decoded yet. Decodes arrive from WSJT-X, JTDX or MSHV over the inbound UDP link (Settings -> UDP).',
@@ -609,7 +609,7 @@ const fr: Dict = {
   'dec.colFreq': 'Freq', 'dec.colFreqTitle': 'Decalage audio dans la bande passante (Hz)',
   'dec.txNow': 'En emission', 'dec.txIdle': 'Emission', 'dec.working': 'appelle', 'dec.toYou': 'pour toi',
   'dec.txUnknown': 'ce logiciel ne communique pas son texte d emission',
-  'dec.colCall': 'Indicatif', 'dec.colSnr': 'SNR', 'dec.colGrid': 'Locator', 'dec.colMsg': 'Message', 'dec.colFlags': 'Nouveau', 'dec.colCountry': 'Pays',
+  'dec.colTime': 'Heure', 'dec.colSnr': 'SNR', 'dec.colMsg': 'Message', 'dec.colCountry': 'Pays', 'dec.colBand': 'Bande', 'dec.colMode': 'Mode', 'dec.colStatus': 'Statut', 'dec.wkd': 'Fait',
   'dec.bgPota': 'POTA', 'dec.bgGrid': 'LOC', 'dec.bgPfx': 'PFX', 'dec.bgCounty': 'CTY',
   'dec.stNew': 'NOUV', 'dec.stBand': 'BANDE', 'dec.stMode': 'MODE', 'dec.stSlot': 'SLOT', 'dec.stCall': 'IND',
   'dec.empty': "Aucun decode pour l'instant. Ils arrivent de WSJT-X, JTDX ou MSHV par le lien UDP entrant (Reglages -> UDP).",