feat(webui): add minimal dashboard (Pico.css) with tail, trigger, status; JSON endpoints: /api/info,/api/channels,/api/tail,/api/trigger; default compose/UI auth via HTTP_TOKEN

cmd/sojuboy/main.go

@@ -118,6 +118,10 @@ func main() {
 		Metrics:           metrics,
 		Ready:             func() bool { return atomic.LoadInt64(&metrics.ConnectedGauge) == 1 },
 		SummarizerTimeout: cfg.SummarizerTimeout,
+		Version:           version,
+		Commit:            commit,
+		BuiltAt:           builtAt,
+		StartedAt:         time.Now(),
 	}
 	go func() {
 		if err := api.Start(ctx); err != nil && err != http.ErrServerClosed {