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

README.md

@@ -277,11 +277,12 @@ Press `l` in the TUI to view real-time HTTP traffic for a selected forward. The
 | LATENCY | Request duration |
 | PATH | Request path |
 
-**Keyboard shortcuts:**
+**List view shortcuts:**
 
 | Key | Action |
 |-----|--------|
 | `↑/↓` | Navigate entries |
+| `Enter` | View request details |
 | `g/G` | Jump to top/bottom |
 | `a` | Toggle auto-scroll |
 | `f` | Cycle filter mode (All → Non-2xx → Errors) |
@@ -289,6 +290,26 @@ Press `l` in the TUI to view real-time HTTP traffic for a selected forward. The
 | `c` | Clear all filters |
 | `q` | Close log viewer |
 
+**Detail view:**
+
+Press `Enter` on any entry to see full request/response details including:
+- Request and response headers (alphabetically sorted)
+- Request and response bodies
+- Timing information and status codes
+
+| Key | Action |
+|-----|--------|
+| `↑/↓` | Scroll content |
+| `PgUp/PgDn` | Scroll by page |
+| `g` | Jump to top |
+| `c` | Copy response body to clipboard |
+| `Esc/q` | Return to list |
+
+**Body display features:**
+- **JSON formatting** - JSON bodies are pretty-printed with syntax highlighting
+- **Compression handling** - gzip/deflate content is automatically decompressed
+- **Binary detection** - Binary content shows a placeholder instead of garbled data
+
 **Filter modes:**
 - **All** - Show all entries
 - **Non-2xx** - Hide successful (2xx) responses