feat(slog): add slog.Handler adapter (#20)

* docs: add example programs for common usage patterns

Adds four focused examples in examples/ directory:
- basic: drop-in logger with web UI
- namespaces: namespace-based logging by component
- client: programmatic log client with filtering
- log-levels: all log levels and filtering

Fixes #7

* feat(slog): add slog.Handler adapter for log-socket

Implements log/slog.Handler that routes structured log records into the
log-socket broadcasting system. Supports namespaces, WithAttrs,
WithGroup, and configurable minimum level.

Also adds Broadcast() as a public entry point for adapter packages
that construct log.Entry values directly.

* chore: update to Go 1.26, resolve slog LogValuer values

log/log.go

@@ -103,7 +103,7 @@ func createLog(e Entry) {
 	namespacesMux.Lock()
 	namespaces[e.Namespace] = true
 	namespacesMux.Unlock()
-	
+
 	sliceTex.Lock()
 	for _, c := range clients {
 		func(c *Client, e Entry) {
@@ -133,7 +133,7 @@ func createLog(e Entry) {
 func GetNamespaces() []string {
 	namespacesMux.RLock()
 	defer namespacesMux.RUnlock()
-	
+
 	result := make([]string, 0, len(namespaces))
 	for ns := range namespaces {
 		result = append(result, ns)
@@ -556,3 +556,37 @@ func fileInfo(skip int) string {
 	}
 	return fmt.Sprintf("%s:%d", file, line)
 }
+
+// Broadcast sends an [Entry] to all registered clients. This is the public
+// entry point used by adapter packages (such as the slog handler) that
+// construct entries themselves. The unexported level field is inferred from
+// [Entry.Level] when not already set.
+func Broadcast(e Entry) {
+	if e.level == 0 && e.Level != "" && e.Level != "TRACE" {
+		e.level = parseLevelString(e.Level)
+	}
+	createLog(e)
+}
+
+func parseLevelString(s string) Level {
+	switch s {
+	case "TRACE":
+		return LTrace
+	case "DEBUG":
+		return LDebug
+	case "INFO":
+		return LInfo
+	case "NOTICE":
+		return LNotice
+	case "WARN":
+		return LWarn
+	case "ERROR":
+		return LError
+	case "PANIC":
+		return LPanic
+	case "FATAL":
+		return LFatal
+	default:
+		return LInfo
+	}
+}