fix(rotator): put the SP/LP readout inside the compass itself

It went under the Station Control rotator; the compass that wanted it is the
docked one beside the entry strip. Both are the same RotorCompass, so the
readout moves INTO that component: every compass in the app carries it, and no
caller draws its own.

The bezel already showed the short path as a red marker, but a marker is a
direction, not a number — and the numbers in the status bar are 10px, which is
what prompted this.

Clickable only when the caller passed onGoto, since a compass rendered without
one cannot turn anything and a button that does nothing is worse than a label.

internal/extsvc/extsvc.go

@@ -65,23 +65,25 @@ const (
 // AutoUpload + UploadMode are common to all (timing is per-service, so the
 // user can run e.g. Club Log immediate and QRZ delayed).
 type ServiceConfig struct {
-	APIKey               string     `json:"api_key"`
-	URL                  string     `json:"url"`                    // Cloudlog/Wavelog: base URL of the user's own instance
-	StationID            string     `json:"station_id"`             // Cloudlog/Wavelog: station profile (location) id
-	Email                string     `json:"email"`                  // Club Log account email
-	Username             string     `json:"username"`               // LoTW website login (for confirmation download)
-	Password             string     `json:"password"`               // Club Log account / LoTW website password
-	Callsign             string     `json:"callsign"`               // Club Log / HRDLog logbook (owner) callsign
-	Code                 string     `json:"code"`                   // HRDLog: account upload code
-	QTHNickname          string     `json:"qth_nickname"`           // eQSL: QTH nickname (when the account has several)
-	ForceStationCallsign string     `json:"force_station_callsign"` // QRZ + LoTW: override STATION_CALLSIGN
-	TQSLPath             string     `json:"tqsl_path"`              // LoTW: path to tqsl.exe
-	StationLocation      string     `json:"station_location"`       // LoTW: TQSL Station Location name
-	KeyPassword          string     `json:"key_password"`           // LoTW: certificate private-key password (optional)
-	UploadFlags          []string   `json:"upload_flags"`           // LoTW: set of lotw_sent values that mean "ready to upload" — any of "N"/"R"
-	WriteLog             bool       `json:"write_log"`              // LoTW: pass -t to write a TQSL diagnostic log
-	AutoUpload           bool       `json:"auto_upload"`
-	UploadMode           UploadMode `json:"upload_mode"`
+	APIKey               string   `json:"api_key"`
+	URL                  string   `json:"url"`                    // Cloudlog/Wavelog: base URL of the user's own instance
+	StationID            string   `json:"station_id"`             // Cloudlog/Wavelog: station profile (location) id
+	Email                string   `json:"email"`                  // Club Log account email
+	Username             string   `json:"username"`               // LoTW website login (for confirmation download)
+	Password             string   `json:"password"`               // Club Log account / LoTW website password
+	Callsign             string   `json:"callsign"`               // Club Log / HRDLog logbook (owner) callsign
+	Code                 string   `json:"code"`                   // HRDLog: account upload code
+	QTHNickname          string   `json:"qth_nickname"`           // eQSL: QTH nickname (when the account has several)
+	ForceStationCallsign string   `json:"force_station_callsign"` // QRZ + LoTW: override STATION_CALLSIGN
+	TQSLPath             string   `json:"tqsl_path"`              // LoTW: path to tqsl.exe
+	StationLocation      string   `json:"station_location"`       // LoTW: TQSL Station Location name
+	KeyPassword          string   `json:"key_password"`           // LoTW: certificate private-key password (optional)
+	UploadFlags          []string `json:"upload_flags"`           // LoTW: set of lotw_sent values that mean "ready to upload" — any of "N"/"R"
+	WriteLog             bool     `json:"write_log"`              // LoTW: pass -t to write a TQSL diagnostic log
+	AutoUpload           bool     `json:"auto_upload"`
+	// OnAir: HRDLog only — publish the live frequency, mode and rig on the site.
+	OnAir      bool       `json:"on_air"`
+	UploadMode UploadMode `json:"upload_mode"`
 }
 
 // normalised returns the config with whitespace trimmed and a valid upload

internal/extsvc/hrdlog.go

@@ -6,6 +6,7 @@ import (
 	"io"
 	"net/http"
 	"net/url"
+	"strconv"
 	"strings"
 	"time"
 )
@@ -143,3 +144,59 @@ func TestHRDLog(ctx context.Context, client *http.Client, cfg ServiceConfig) (st
 	}
 	return fmt.Sprintf("Credentials accepted — %s", callsign), nil
 }
+
+// hrdlogOnAirURL is HRDLog's live-status endpoint — what puts "F4BPO is on air
+// 14,074,000 FM IC-7300" on the site's front page.
+//
+// Endpoint and field names taken from HRDLog's own library (github.com/iw1qlh/
+// HRDLOG-net-library, HrdProtocol.SendOnAirAsync), not from guesswork: it posts
+// Frequency in Hz, Mode, Radio, Callsign, Code and App.
+//
+// HTTPS where that library uses plain HTTP. The upload code is a credential and
+// has no business crossing the network in clear; the sibling NewEntry endpoint
+// on the same host already serves TLS.
+const hrdlogOnAirURL = "https://robot.hrdlog.net/OnAir.aspx"
+
+// SendHRDLogOnAir publishes the current frequency, mode and rig.
+//
+// Deliberately fire-and-forget in spirit: it is a status broadcast, so a
+// failure is logged and never surfaced as an error the operator must clear —
+// but the message is returned so the caller can log WHAT the site said rather
+// than only that something went wrong.
+func SendHRDLogOnAir(ctx context.Context, client *http.Client, callsign, code string, freqHz int64, mode, radio string) (string, error) {
+	callsign = strings.ToUpper(strings.TrimSpace(callsign))
+	code = strings.TrimSpace(code)
+	if callsign == "" || code == "" {
+		return "", fmt.Errorf("hrdlog: callsign and upload code required")
+	}
+	if freqHz <= 0 {
+		return "", fmt.Errorf("hrdlog: no frequency to announce")
+	}
+	form := url.Values{}
+	form.Set("Callsign", callsign)
+	form.Set("Code", code)
+	form.Set("App", hrdlogApp)
+	form.Set("Frequency", strconv.FormatInt(freqHz, 10))
+	form.Set("Mode", strings.TrimSpace(mode))
+	form.Set("Radio", strings.TrimSpace(radio))
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, hrdlogOnAirURL, strings.NewReader(form.Encode()))
+	if err != nil {
+		return "", fmt.Errorf("hrdlog on-air: build request: %w", err)
+	}
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+	if client == nil {
+		client = &http.Client{Timeout: 15 * time.Second}
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return "", fmt.Errorf("hrdlog on-air: %w", err)
+	}
+	defer resp.Body.Close()
+	body, _ := io.ReadAll(io.LimitReader(resp.Body, 32*1024))
+	msg := strings.TrimSpace(string(body))
+	if resp.StatusCode != http.StatusOK {
+		return msg, fmt.Errorf("hrdlog on-air: http %d", resp.StatusCode)
+	}
+	return msg, nil
+}