Switch the lab reflector to jayReflector and harden local station use.

Build DJ1JAY’s fork with an optional Satellite/Trunk stub, allow -c/--config, open capture and playback as separate devices, and add a lab start helper.

Co-authored-by: Cursor <cursoragent@cursor.com>

station/config.go

@@ -1,7 +1,9 @@
 package station
 
 import (
+	"errors"
 	"fmt"
+	"io/fs"
 	"math"
 	"os"
 	"path/filepath"
@@ -48,13 +50,13 @@ var callsignPattern = regexp.MustCompile(`^[A-Z0-9][A-Z]{0,2}\d[A-Z0-9]{0,3}[A-Z
 func loadConfig(path string) (loaded, error) {
 	body, err := os.ReadFile(path)
 	if err != nil {
-		if os.IsNotExist(err) {
+		if errors.Is(err, fs.ErrNotExist) {
 			if err := writeTemplate(path); err != nil {
 				return loaded{}, err
 			}
 			return loaded{}, fmt.Errorf("created %s", path)
 		}
-		return loaded{}, fmt.Errorf("could not be read")
+		return loaded{}, fmt.Errorf("the file could not be read: %w", err)
 	}
 	return parseConfig(path, body)
 }
@@ -83,7 +85,7 @@ func writeTemplate(path string) error {
 func parseConfig(path string, body []byte) (loaded, error) {
 	var shape fileShape
 	if err := jsonv2.Unmarshal(body, &shape); err != nil {
-		return loaded{}, fmt.Errorf("could not be read")
+		return loaded{}, fmt.Errorf("the file could not be read: %w", err)
 	}
 	if block, notice := blockedLog(shape); block {
 		cfg, err := parseOperational(shape)
@@ -99,7 +101,7 @@ func parseConfig(path string, body []byte) (loaded, error) {
 		}
 		shape = withLogDefaults(shape)
 		if err := rewriteConfig(path, shape); err != nil {
-			return loaded{}, fmt.Errorf("could not be read")
+			return loaded{}, fmt.Errorf("the file could not be read: %w", err)
 		}
 	}
 	cfg, err := parseOperational(shape)