chore(lint): fix golangci-lint issues in navigation-station-demo

- Add package comment (revive: package-comments)
- Use index-based range loop for stations slice to avoid 160-byte copy
  per iteration (gocritic: rangeValCopy)
- Rename unused client parameters to _ in three stub functions (revive:
  unused-parameter)
- Remove custom min() helper; Go 1.21+ provides a built-in min (revive:
  redefines-builtin-id)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cmd/soundtouch-cli/cmd_preset.go

@@ -151,6 +151,7 @@ func resolveLocationAndMetadata(params *presetParams) error {
 		!isOrionLocation(params.location) &&
 		(strings.HasPrefix(params.location, "http://") || strings.HasPrefix(params.location, "https://")) {
 		params.location = buildOrionLocation(params.serviceURL, params.name, params.artwork, resolvedLocation)
+
 		fmt.Printf("  Wrapped stream URL in Orion location for LOCAL_INTERNET_RADIO\n")
 	} else if params.source == "LOCAL_INTERNET_RADIO" &&
 		params.serviceURL == "" &&