fix: resolve whitespace (wsl_v5) issues - part 1

- Fix whitespace issues in cmd files (example-mdns, example-upnp, soundtouch-cli, websocket-demo)
- Fix whitespace issues in client.go and websocket.go
- Fix whitespace issues in test files
- Restore accidentally removed deviceHost variable
- Add proper spacing around loops, conditionals, and function calls

Progress: Continuing to resolve remaining wsl_v5 linting issues

pkg/client/balance_test.go

@@ -351,6 +351,7 @@ func TestClient_IncreaseBalance(t *testing.T) {
 					w.WriteHeader(http.StatusOK)
 				}
 			}))
+
 			defer server.Close()
 
 			config := &Config{
@@ -438,6 +439,7 @@ func TestClient_DecreaseBalance(t *testing.T) {
 					w.WriteHeader(http.StatusOK)
 				}
 			}))
+
 			defer server.Close()
 
 			config := &Config{

pkg/client/bass_integration_test.go

@@ -366,6 +366,7 @@ func BenchmarkClient_Bass_Integration(b *testing.B) {
 
 	b.Run("GetBass", func(b *testing.B) {
 		b.ResetTimer()
+
 		for i := 0; i < b.N; i++ {
 			_, err := client.GetBass()
 			if err != nil {
@@ -377,6 +378,7 @@ func BenchmarkClient_Bass_Integration(b *testing.B) {
 	b.Run("SetBass", func(b *testing.B) {
 		bassLevels := []int{-3, 0, 3, -1, 1} // Cycle through different levels
 		b.ResetTimer()
+
 		for i := 0; i < b.N; i++ {
 			level := bassLevels[i%len(bassLevels)]
 			err := client.SetBass(level)

pkg/client/client.go

@@ -248,6 +248,7 @@ func (c *Client) VolumeDown() error {
 // SelectPreset sends a preset key command (1-6)
 func (c *Client) SelectPreset(presetNumber int) error {
 	var keyValue string
+
 	switch presetNumber {
 	case 1:
 		keyValue = models.KeyPreset1
@@ -648,6 +649,7 @@ func (c *Client) get(endpoint string, result interface{}) error {
 	if err != nil {
 		return fmt.Errorf("failed to execute request: %w", err)
 	}
+
 	defer func() {
 		if closeErr := resp.Body.Close(); closeErr != nil {
 			// Log the error but don't override the main error
@@ -704,6 +706,7 @@ func (c *Client) post(endpoint string, payload, result interface{}) error {
 	if err != nil {
 		return fmt.Errorf("failed to execute request: %w", err)
 	}
+
 	defer func() {
 		if closeErr := resp.Body.Close(); closeErr != nil {
 			// Log the error but don't override the main error

pkg/client/websocket.go

@@ -362,6 +362,7 @@ func (ws *WebSocketClient) handleEvent(event *models.WebSocketEvent) {
 
 	for _, eventType := range eventTypes {
 		hasKnownEvent = true
+
 		switch eventType {
 		case models.EventTypeNowPlaying:
 			if handlers.OnNowPlaying != nil && event.NowPlayingUpdated != nil {