fix(counties): make the cluster and the entry panel agree on a US county

An operator asked why K1SEI showed "Middlesex" in Info (F2) and "Lower
Connecticut River Valley" in the cluster. Two sources: the entry panel has
a callbook answer, a spot carries only a callsign so the cluster derives one
from the FCC licence ZIP through GeoNames — and GeoNames has followed the
Census in replacing Connecticut's counties with the 2022 planning regions.
No award, callbook or log uses those, so every CT station matched nothing:
new county for ever, and counting toward nothing.

Measured against a full ULS import (1 556 444 US callsigns), 23 223 resolved
to a name the USA-CA reference does not contain. Three causes, three fixes:

  - Spelling. "City and County of San Francisco", "Baltimore (city)",
    "Nome (CA)", plus counties renamed since the award list was drawn
    (Kusilvak, Oglala Lakota, the Valdez-Cordova split) and Alaska's four
    "X City and Borough", whose reference codes read "JUNEAUCITYAND" because
    the county-type suffix strip eats the wrong end. Normalised in
    award.USCountyKey, which both sides already go through. 7 515 callsigns,
    no re-download needed.

  - Doña Ana, NM shipped into the reference as "NM/DO̱AANA" — mangled by a
    non-UTF-8 CSV line, a code nothing could ever produce, so that county was
    unwinnable and silent about it. Row repaired, cntygen now refuses such a
    line, and a test makes every one of the 3 102 references reproduce its own
    code from its own name.

  - Connecticut. A planning region is drawn from towns in several counties, so
    no name maps to a name — only the ZIP can resolve it. cmd/ctzipgen builds
    the table from the Census 2020 crosswalk, filling PO-box-only ZIPs from the
    nearest resolved centroid; all 11 ZIPs GeoNames still labels with a real
    county agree with the result. 15 037 callsigns, applied at import, so the
    store now carries a rules version and Settings says when a re-download is
    needed.

Alignment itself is the last piece: a spot now shows the county the station is
logged with when we have one, and falls back to the ZIP-derived county only for
stations never worked.

internal/qso/qso.go

@@ -2265,6 +2265,52 @@ func (r *Repo) WorkedCountyKeys(ctx context.Context, keyFn func(state, cnty stri
 	return out, rows.Err()
 }
 
+// CallCounties returns callsign → "STATE,County" for every US station already
+// logged with a county, newest QSO winning.
+//
+// It exists so the cluster shows the SAME county the entry panel does. The
+// entry panel gets its county from a callbook, which knows where the licensee
+// actually lives; a spot carries only a callsign, so the cluster falls back to
+// deriving one from the FCC licence address, which is right about 98% of the
+// time. Where the log already holds a callbook's answer for that station, the
+// two panels disagreeing is pure noise — this is what lets the better answer
+// win in both.
+//
+// One DISTINCT scan when the cluster snapshot is rebuilt, then map lookups per
+// spot, like the worked-county and worked-grid sets beside it.
+func (r *Repo) CallCounties(ctx context.Context) (map[string]string, error) {
+	rows, err := r.db.QueryContext(ctx,
+		`SELECT callsign, COALESCE(state,''), COALESCE(cnty,'') FROM qso
+		 WHERE dxcc IN (291,110,6) AND cnty IS NOT NULL AND cnty != ''
+		 ORDER BY qso_date, time_on`)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	out := make(map[string]string, 1024)
+	for rows.Next() {
+		var call, state, cnty string
+		if err := rows.Scan(&call, &state, &cnty); err != nil {
+			return nil, err
+		}
+		call = strings.ToUpper(strings.TrimSpace(call))
+		cnty = strings.TrimSpace(cnty)
+		if call == "" || cnty == "" {
+			continue
+		}
+		// Store the ADIF "STATE,County" shape whatever the log holds, so the
+		// caller has both halves without a second column.
+		if !strings.Contains(cnty, ",") {
+			if state = strings.TrimSpace(state); state == "" {
+				continue
+			}
+			cnty = state + "," + cnty
+		}
+		out[call] = cnty
+	}
+	return out, rows.Err()
+}
+
 // CountyWorked reports whether one US county has already been worked.
 //
 // It exists so the entry panel can flag a new county without loading the whole