Fix golangci-lint findings and improve code quality

Move example files to separate packages to avoid main redeclaration. Fix cyclomatic complexity and variable shadowing. Address errcheck and wsl linting issues. Update tests to handle capabilities and fix panics. Apply consistent formatting with gofmt.

cmd/soundtouch-cli/cmd_audio.go

@@ -62,9 +62,11 @@ func setAudioDSPControls(c *cli.Context) error {
 	}
 
 	fmt.Println("✅ DSP controls updated successfully")
+
 	if audioMode != "" {
 		fmt.Printf("   Audio Mode: %s\n", audioMode)
 	}
+
 	if videoSyncDelay != 0 {
 		fmt.Printf("   Video Sync Delay: %d ms\n", videoSyncDelay)
 	}
@@ -161,21 +163,24 @@ func setAudioToneControls(c *cli.Context) error {
 	}
 
 	var bass, treble *int
+
 	var err error
 
 	if bassStr != "" {
-		bassVal, err := strconv.Atoi(bassStr)
-		if err != nil {
+		bassVal, errVal := strconv.Atoi(bassStr)
+		if errVal != nil {
 			return fmt.Errorf("invalid bass value: %s", bassStr)
 		}
+
 		bass = &bassVal
 	}
 
 	if trebleStr != "" {
-		trebleVal, err := strconv.Atoi(trebleStr)
-		if err != nil {
+		trebleVal, errVal := strconv.Atoi(trebleStr)
+		if errVal != nil {
 			return fmt.Errorf("invalid treble value: %s", trebleStr)
 		}
+
 		treble = &trebleVal
 	}
 
@@ -194,9 +199,11 @@ func setAudioToneControls(c *cli.Context) error {
 	}
 
 	fmt.Println("✅ Advanced tone controls updated successfully")
+
 	if bass != nil {
 		fmt.Printf("   Bass: %d\n", *bass)
 	}
+
 	if treble != nil {
 		fmt.Printf("   Treble: %d\n", *treble)
 	}
@@ -295,21 +302,24 @@ func setAudioLevelControls(c *cli.Context) error {
 	}
 
 	var frontCenter, rearSurround *int
+
 	var err error
 
 	if frontCenterStr != "" {
-		frontCenterVal, err := strconv.Atoi(frontCenterStr)
-		if err != nil {
+		frontCenterVal, errVal := strconv.Atoi(frontCenterStr)
+		if errVal != nil {
 			return fmt.Errorf("invalid front-center value: %s", frontCenterStr)
 		}
+
 		frontCenter = &frontCenterVal
 	}
 
 	if rearSurroundStr != "" {
-		rearSurroundVal, err := strconv.Atoi(rearSurroundStr)
-		if err != nil {
+		rearSurroundVal, errVal := strconv.Atoi(rearSurroundStr)
+		if errVal != nil {
 			return fmt.Errorf("invalid rear-surround value: %s", rearSurroundStr)
 		}
+
 		rearSurround = &rearSurroundVal
 	}
 
@@ -328,9 +338,11 @@ func setAudioLevelControls(c *cli.Context) error {
 	}
 
 	fmt.Println("✅ Speaker level controls updated successfully")
+
 	if frontCenter != nil {
 		fmt.Printf("   Front-Center Speaker: %d\n", *frontCenter)
 	}
+
 	if rearSurround != nil {
 		fmt.Printf("   Rear-Surround Speakers: %d\n", *rearSurround)
 	}