feat(hamqth): the sent stamp reaches the columns, the filter and bulk edit

HAMLOG.online was wired into all three when it arrived; HamQTH shipped
with only its uploader and its editor row, so the log could not be asked
'which contacts have never gone there' — the question that precedes
every backlog upload — and a log uploaded to HamQTH by hand could not be
marked, leaving OpsLog offering to send every one of those contacts
again. Sent side only, both whitelists, both panels, two hidden-by-
default columns.

frontend/src/components/BulkEditModal.tsx

@@ -56,6 +56,8 @@ const FIELDS: FieldDef[] = [
   { id: 'hamlog_sent_date',  label: 'bulk.fHamlogSentDate',  group: 'QSL / upload', kind: 'date' },
   { id: 'hamlog_rcvd',       label: 'bulk.fHamlogRcvd',      group: 'QSL / upload', kind: 'status' },
   { id: 'hamlog_rcvd_date',  label: 'bulk.fHamlogRcvdDate',  group: 'QSL / upload', kind: 'date' },
+  { id: 'hamqth_sent',       label: 'bulk.fHamqthSent',      group: 'QSL / upload', kind: 'status' },
+  { id: 'hamqth_sent_date',  label: 'bulk.fHamqthSentDate',  group: 'QSL / upload', kind: 'date' },
   // My station / operator
   { id: 'station_callsign', label: 'bulk.fStationCall',  group: 'My station', kind: 'text', upper: true },
   { id: 'operator',         label: 'bulk.fOperator',     group: 'My station', kind: 'text', upper: true },

frontend/src/components/FilterBuilder.tsx

@@ -96,6 +96,8 @@ const FIELDS: { value: string; label: string; type: FieldType }[] = [
   { value: 'hamlog_sent_date', label: 'fltb.fHamlogSentDate', type: 'adifdate' },
   { value: 'hamlog_rcvd', label: 'fltb.fHamlogRcvd', type: 'text' },
   { value: 'hamlog_rcvd_date', label: 'fltb.fHamlogRcvdDate', type: 'adifdate' },
+  { value: 'hamqth_sent', label: 'fltb.fHamqthSent', type: 'text' },
+  { value: 'hamqth_sent_date', label: 'fltb.fHamqthSentDate', type: 'adifdate' },
   { value: 'contest_id', label: 'fltb.fContestId', type: 'text' },
   { value: 'srx', label: 'fltb.fSerialRcvd', type: 'number' },
   { value: 'stx', label: 'fltb.fSerialSent', type: 'number' },

frontend/src/components/RecentQSOsGrid.tsx

@@ -219,6 +219,9 @@ export const makeColCatalog = (t: TFn, myGrid?: string): ColEntry[] => [
   { group: 'Uploads', label: t('rqg.c.hamlog_sent_date'), colId: 'hamlog_sent_date', headerName: t('rqg.h.hamlog_sent_date'), width: 110, valueGetter: (p) => fmtDateOnly((p.data as any)?.extras?.['APP_OPSLOG_HAMLOG_SENT_DATE']), defaultVisible: false },
   { group: 'Uploads', label: t('rqg.c.hamlog_rcvd'), colId: 'hamlog_rcvd', headerName: t('rqg.h.hamlog_rcvd'), width: 100, cellClass: qslStatusCellClass, valueGetter: (p) => { const e = (p.data as any)?.extras ?? {}; return e['APP_HAMLOG_QSO_CFM'] || e['APP_OPSLOG_HAMLOG_QSL'] || 'N'; }, defaultVisible: false },
   { group: 'Uploads', label: t('rqg.c.hamlog_rcvd_date'), colId: 'hamlog_rcvd_date', headerName: t('rqg.h.hamlog_rcvd_date'), width: 110, valueGetter: (p) => fmtDateOnly((p.data as any)?.extras?.['APP_OPSLOG_HAMLOG_QSL_DATE']), defaultVisible: false },
+  // HamQTH, the extras again — sent only, the site having no confirmations.
+  { group: 'Uploads', label: t('rqg.c.hamqth_sent'), colId: 'hamqth_sent', headerName: t('rqg.h.hamqth_sent'), width: 100, cellClass: qslStatusCellClass, valueGetter: (p) => { const e = (p.data as any)?.extras ?? {}; return e['APP_OPSLOG_HAMQTH_SENT'] || 'N'; }, defaultVisible: false },
+  { group: 'Uploads', label: t('rqg.c.hamqth_sent_date'), colId: 'hamqth_sent_date', headerName: t('rqg.h.hamqth_sent_date'), width: 110, valueGetter: (p) => fmtDateOnly((p.data as any)?.extras?.['APP_OPSLOG_HAMQTH_SENT_DATE']), defaultVisible: false },
   // App-specific: when the QSO's audio recording was e-mailed to the station.
   { group: 'QSL', label: t('rqg.c.opslog_recording_sent'), colId: 'opslog_recording_sent', headerName: t('rqg.h.opslog_recording_sent'), width: 100, cellClass: qslStatusCellClass, valueGetter: (p) => { const e = (p.data as any)?.extras ?? {}; return e['APP_OPSLOG_RECORDING_SENT'] ? 'Y' : 'N'; }, defaultVisible: false },