feat: ClubLog Most Wanted rank in the entry band matrix

Opt-in (Settings → General). Shows a "MW #rank" pill next to the DXCC entity
name in the entry-strip band/slot matrix — ClubLog's Most Wanted ranking
(1 = most wanted), personalised to the operator's callsign and refreshed daily.

- internal/clublog/mostwanted.go: fetch mostwanted.php?api=1&callsign=<CALL>
  (rank→DXCC JSON, real User-Agent), invert to dxcc→rank, cache to
  <dataDir>/clublog_mostwanted.json; NeedsRefresh invalidates on callsign change.
- app.go: keyClublogMostWanted setting, a.clublogMW, startup refresh goroutine,
  activeCallsign() helper, and Get/Set/Download bindings mirroring the cty ones.
  WorkedBefore now carries MWRank (qso.WorkedBefore.MWRank) when enabled.
- BandSlotGrid.tsx: MW pill next to the entity name, colour-tiered by rank.
- SettingsModal General: toggle + download button + status, mirroring the
  ClubLog cty-exceptions block.

Also reorganises the changelog: the theme-persistence fix (landed after the
v0.20.11 tag) plus this feature go under a new 0.20.12 entry; 0.20.11 keeps only
what shipped in its binary.

app.go

@@ -136,6 +136,7 @@ const (
 	keyAwardEditsSeeded = "awards.defs.editflag" // one-shot: back-fill the user-edited flag
 
 	keyClublogCtyEnabled = "clublog.cty_exceptions" // "1" → apply ClubLog exceptions
+	keyClublogMostWanted = "clublog.most_wanted"    // "1" → show ClubLog Most Wanted rank in the entry matrix
 
 	// E-mail / SMTP — send QSO recordings to the correspondent.
 	keyEmailEnabled    = "email.enabled"
@@ -464,6 +465,7 @@ type App struct {
 	extsvc         *extsvc.Manager
 	winkeyer       *winkeyer.Manager
 	clublog        *clublog.Manager
+	clublogMW      *clublog.MostWanted // ClubLog "Most Wanted" DXCC ranking (opt-in)
 	motorAnt       motorAntenna        // motorized antenna (Ultrabeam or SteppIR); nil when disabled
 	ubFollowStop   chan struct{}       // stops the "follow frequency" loop; nil when off
 	motorInhibStop chan struct{}       // stops the "inhibit TX while moving" loop; nil when off
@@ -954,6 +956,30 @@ func (a *App) startup(ctx context.Context) {
 		}
 	}()
 
+	// ClubLog "Most Wanted" DXCC ranking (opt-in, Settings → General). Loaded from
+	// the cached JSON, then refreshed daily and whenever the operator's callsign
+	// changes (the ranking is personalised per callsign). Best-effort.
+	a.clublogMW = clublog.NewMostWanted(dataDir)
+	go func() {
+		if a.settings == nil {
+			return
+		}
+		if v, _ := a.settings.Get(a.ctx, keyClublogMostWanted); v != "1" {
+			return // feature off — don't touch the network
+		}
+		_ = a.clublogMW.LoadFromDisk()
+		call := a.activeCallsign()
+		if a.clublogMW.NeedsRefresh(call, 24*time.Hour) {
+			if err := a.clublogMW.Download(context.Background(), call); err != nil {
+				applog.Printf("clublog most-wanted: auto-refresh failed: %v", err)
+			}
+		}
+		if a.clublogMW.Loaded() {
+			c, d, n := a.clublogMW.Info()
+			applog.Printf("clublog most-wanted: loaded %d entities for %s (%s)", n, c, d)
+		}
+	}()
+
 	// POTA: background poller of api.pota.app so cluster spots can be tagged
 	// when the DX station is currently activating a park. Best-effort.
 	a.pota = pota.New(func(format string, args ...any) { applog.Printf(format, args...) })
@@ -5247,7 +5273,13 @@ func (a *App) WorkedBefore(callsign string, dxccHint int) (qso.WorkedBefore, err
 			dxccHint = dxcc.EntityDXCC(m.Entity.Name)
 		}
 	}
-	return a.qso.WorkedBefore(a.ctx, callsign, dxccHint)
+	wb, err := a.qso.WorkedBefore(a.ctx, callsign, dxccHint)
+	// Attach the ClubLog Most Wanted rank for this entity (opt-in) so the entry
+	// matrix can show it next to the country name.
+	if err == nil && wb.DXCC > 0 && a.clublogMW != nil && a.clublogMostWantedEnabled() {
+		wb.MWRank = a.clublogMW.Rank(wb.DXCC)
+	}
+	return wb, err
 }
 
 // SetCompactMode toggles a tiny always-on-top window that exposes just the
@@ -7327,6 +7359,74 @@ func (a *App) DownloadClublogCty() (ClublogCtyInfo, error) {
 	return a.GetClublogCtyInfo(), nil
 }
 
+// activeCallsign is the current profile's callsign (upper-cased), "" if none.
+func (a *App) activeCallsign() string {
+	if a.profiles == nil {
+		return ""
+	}
+	if p, err := a.profiles.Active(a.ctx); err == nil {
+		return strings.ToUpper(strings.TrimSpace(p.Callsign))
+	}
+	return ""
+}
+
+func (a *App) clublogMostWantedEnabled() bool {
+	if a.settings == nil {
+		return false
+	}
+	v, _ := a.settings.Get(a.ctx, keyClublogMostWanted)
+	return v == "1"
+}
+
+// ClublogMostWantedInfo is the UI status of the ClubLog Most Wanted data.
+type ClublogMostWantedInfo struct {
+	Enabled  bool   `json:"enabled"`
+	Loaded   bool   `json:"loaded"`
+	Callsign string `json:"callsign"`
+	Date     string `json:"date"`
+	Count    int    `json:"count"`
+}
+
+// GetClublogMostWantedInfo returns the current Most Wanted status.
+func (a *App) GetClublogMostWantedInfo() ClublogMostWantedInfo {
+	info := ClublogMostWantedInfo{Enabled: a.clublogMostWantedEnabled()}
+	if a.clublogMW != nil {
+		info.Loaded = a.clublogMW.Loaded()
+		info.Callsign, info.Date, info.Count = a.clublogMW.Info()
+	}
+	return info
+}
+
+// SetClublogMostWantedEnabled toggles the Most Wanted feature. On first enable it
+// loads the cached list (the UI then calls Download to fetch a fresh one).
+func (a *App) SetClublogMostWantedEnabled(on bool) error {
+	if a.settings == nil {
+		return fmt.Errorf("db not initialized")
+	}
+	v := "0"
+	if on {
+		v = "1"
+	}
+	if err := a.settings.Set(a.ctx, keyClublogMostWanted, v); err != nil {
+		return err
+	}
+	if on && a.clublogMW != nil && !a.clublogMW.Loaded() {
+		_ = a.clublogMW.LoadFromDisk() // ok if not downloaded yet
+	}
+	return nil
+}
+
+// DownloadClublogMostWanted fetches a fresh Most Wanted list for the active call.
+func (a *App) DownloadClublogMostWanted() (ClublogMostWantedInfo, error) {
+	if a.clublogMW == nil {
+		return ClublogMostWantedInfo{}, fmt.Errorf("clublog not initialized")
+	}
+	if err := a.clublogMW.Download(a.ctx, a.activeCallsign()); err != nil {
+		return a.GetClublogMostWantedInfo(), err
+	}
+	return a.GetClublogMostWantedInfo(), nil
+}
+
 // applyClublogException overrides a QSO's entity fields from a ClubLog
 // exception matching its callsign at its date. force=true ignores the
 // enable toggle (used by the explicit "Update from ClubLog" action).