feat: complete session preferences and PAM fixture gates

legacy/go/config/config.go

@@ -168,7 +168,6 @@ func LoadVariables(filename string) (map[string]string, error) {
 	if err != nil {
 		return nil, fmt.Errorf("read %s: %w", filename, err)
 	}
-	// Parse a flat TOML table of string values.
 	vars := make(map[string]string)
 	var table map[string]any
 	if err := toml.Unmarshal(raw, &table); err != nil {
@@ -180,8 +179,6 @@ func LoadVariables(filename string) (map[string]string, error) {
 	return vars, nil
 }
 
-// ── variable substitution ───────────────────────────────────────────────
-
 func resolveVars(in string, vars map[string]string) string {
 	for k, v := range vars {
 		in = strings.ReplaceAll(in, "$"+k, v)
@@ -189,8 +186,6 @@ func resolveVars(in string, vars map[string]string) string {
 	return in
 }
 
-// ── embedded default config ─────────────────────────────────────────────
-
 const defaultTOML = `
 tty = 2
 main_log_path = "/var/log/latchd.log"