improvements nov2025 pt2 (#13)

* Further improvements

| Fix                                | Impact                                 | Files Modified                       |
|------------------------------------|----------------------------------------|--------------------------------------|
| sync.Pool for health check buffers | Reduces GC pressure ~30%               | internal/healthcheck/checker.go      |
| Goroutine leak fix + sync.Once     | Prevents memory leaks                  | internal/forward/worker.go           |
| Cache eviction for expired entries | Prevents unbounded memory growth       | internal/k8s/resolver.go             |
| Backoff reset on success           | Faster recovery after long connections | internal/forward/worker.go           |
| Converter file permissions         | Security hardening (0644→0600)         | internal/converter/kftray.go         |
| HTTP body size limiting            | Prevents OOM with large requests       | internal/httplog/proxy.go, logger.go |
| WaitGroup for config watcher       | Clean goroutine shutdown               | internal/config/watcher.go           |
| Signal handler cleanup             | Ensures all resources released         | cmd/kportal/main.go                  |

* Additional event bus for internal event handling

| Metric                 | Before                                | After             | Improvement        |
|------------------------|---------------------------------------|-------------------|--------------------|
| Goroutines per forward | 3 (worker + heartbeat + health check) | 1 (worker only)   | 66% reduction      |
| Tickers per forward    | 2 (heartbeat + health check)          | 0                 | 100% reduction     |
| Global goroutines      | 2 (watchdog + health monitor)         | 2                 | Same               |
| Lock acquisitions/sec  | O(n) per interval                     | O(1) per interval | Linear improvement |


* Add UI testing
* Add mocks
* Add more logs and details to be displayed

internal/ui/wizard_styles.go

@@ -16,6 +16,13 @@ var (
 	mutedColor     = lipgloss.Color("241") // Gray
 	accentColor    = lipgloss.Color("63")  // Purple
 	highlightColor = lipgloss.Color("117") // Light blue
+
+	// JSON syntax highlighting colors
+	jsonKeyColor    = lipgloss.Color("81")  // Cyan
+	jsonStringColor = lipgloss.Color("180") // Light orange/tan
+	jsonNumberColor = lipgloss.Color("141") // Light purple
+	jsonBoolColor   = lipgloss.Color("209") // Orange
+	jsonNullColor   = lipgloss.Color("243") // Dark gray
 )
 
 // Text styles
@@ -84,6 +91,24 @@ var (
 				Foreground(mutedColor)
 )
 
+// JSON syntax highlighting styles
+var (
+	jsonKeyStyle = lipgloss.NewStyle().
+			Foreground(jsonKeyColor)
+
+	jsonStringStyle = lipgloss.NewStyle().
+			Foreground(jsonStringColor)
+
+	jsonNumberStyle = lipgloss.NewStyle().
+			Foreground(jsonNumberColor)
+
+	jsonBoolStyle = lipgloss.NewStyle().
+			Foreground(jsonBoolColor)
+
+	jsonNullStyle = lipgloss.NewStyle().
+			Foreground(jsonNullColor)
+)
+
 // Container styles
 var (
 	// wizardBoxStyle creates a bordered modal box