fix: bulk edit — name the confirmation fields properly, add the missing ones (#3)

"Upload" was wrong for half of them: a paper QSL is not uploaded. Every entry
now says whether it sets a STATUS or a DATE, and in which direction — "QRZ.com
sent status", "LoTW received date" — which is also how the ADIF fields read.

Added: the QRZ.com received status (the column existed, it was simply never
offered) and the ten confirmation DATES — QSL / LoTW / eQSL / QRZ.com in both
directions, Club Log and HRDLog outbound only, those two having no return
channel. Dates use the same picker as the QSL Info tab, with a Today (UTC)
button; clearing the field writes an empty value, which is how a wrong date is
removed from a batch.

Fields are grouped by CHANNEL now, each status followed by its date, in the same
order as the QSL Info tab — a longer list, but nothing to hunt for.

The repository whitelist is extended to match: without it the new columns would
have been refused at write time. The old ids (qrz_upload, clublog_upload,
hrdlog_upload) still resolve, in case anything still holds one.

internal/qso/qso.go

@@ -536,11 +536,23 @@ type UploadRow struct {
 // uploadStatusCols whitelists the per-service sent-status columns the QSL
 // Manager may filter on (guards the dynamic column name in the query).
 var uploadStatusCols = map[string]bool{
-	"lotw_sent":                 true,
-	"eqsl_sent":                 true,
-	"qrzcom_qso_upload_status":  true,
-	"clublog_qso_upload_status": true,
-	"hrdlog_qso_upload_status":  true,
+	"lotw_sent":                  true,
+	"eqsl_sent":                  true,
+	"qrzcom_qso_upload_status":   true,
+	"qrzcom_qso_download_status": true,
+	"clublog_qso_upload_status":  true,
+	"hrdlog_qso_upload_status":   true,
+	// Confirmation dates (ADIF YYYYMMDD strings, so plain TEXT like the rest).
+	"qsl_sent_date":            true,
+	"qsl_rcvd_date":            true,
+	"lotw_sent_date":           true,
+	"lotw_rcvd_date":           true,
+	"eqsl_sent_date":           true,
+	"eqsl_rcvd_date":           true,
+	"qrzcom_qso_upload_date":   true,
+	"qrzcom_qso_download_date": true,
+	"clublog_qso_upload_date":  true,
+	"hrdlog_qso_upload_date":   true,
 }
 
 // ListForUpload returns QSOs whose per-service sent-status column equals