style(audio): fix formatting and add missing newlines

- Fix indentation and alignment in performance tests
- Add missing newlines at end of files
- Clean up error message formatting for consistency

internal/audio/performance_critical_test.go

@@ -45,7 +45,7 @@ func TestPerformanceCriticalPaths(t *testing.T) {
 // This is the most critical path that must not interfere with KVM
 func testAudioFrameProcessingLatency(t *testing.T) {
 	const (
-		frameCount = 1000
+		frameCount         = 1000
 		maxLatencyPerFrame = 100 * time.Microsecond // Very strict requirement
 	)
 
@@ -202,7 +202,7 @@ func testMemoryAllocationPatterns(t *testing.T) {
 // testConcurrentAccessPerformance tests performance under concurrent access
 func testConcurrentAccessPerformance(t *testing.T) {
 	const (
-		numGoroutines = 10
+		numGoroutines          = 10
 		operationsPerGoroutine = 1000
 	)
 
@@ -306,7 +306,7 @@ func TestRegressionDetection(t *testing.T) {
 	start := time.Now()
 	for i := 0; i < 100; i++ {
 		_ = ValidateAudioFrameFast(frameData)
-			RecordFrameReceived(len(frameData))
+		RecordFrameReceived(len(frameData))
 	}
 	frameProcessingTime := time.Since(start) / 100