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>

config_path.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+)
+
+func defaultConfigPath() (string, error) {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return "", err
+	}
+	return filepath.Join(home, ".funknetz.json"), nil
+}
+
+// resolveConfigPath picks the config file from -c / --config in args (no program name).
+// The default is ~/.funknetz.json. A relative path is resolved against the process CWD.
+func resolveConfigPath(args []string) (string, error) {
+	fs := flag.NewFlagSet("funknetz", flag.ContinueOnError)
+	fs.SetOutput(io.Discard)
+	var config string
+	fs.StringVar(&config, "config", "", "path to the station config file")
+	fs.StringVar(&config, "c", "", "path to the station config file")
+	if err := fs.Parse(args); err != nil {
+		return "", err
+	}
+	if config == "" {
+		path, err := defaultConfigPath()
+		if err != nil {
+			return "", fmt.Errorf("config path: %w", err)
+		}
+		return path, nil
+	}
+	abs, err := filepath.Abs(config)
+	if err != nil {
+		return "", fmt.Errorf("config path: %w", err)
+	}
+	return abs, nil
+}