feat: complete agent monitoring - hook, UI, and backend filter

- Add event_type and framework filters to events query endpoint
- Add /agents SPA route to web-ui server
- Add Agents nav link and route in frontend
- Add agents page CSS (timeline, VM pills, stats panel)
- Build VM status strip, activity timeline, and real-time stats
- Add agentmon hook for OpenClaw (HOOK.md + handler.ts)
- Add docker-compose, Dockerfile, and supporting infra files

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

cmd/web-ui/main.go

@@ -48,7 +48,7 @@ func main() {
 	// SPA catch-all: serve index.html for all other routes
 	mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
 		// Serve index.html for SPA routes
-		if r.URL.Path == "/" || strings.HasPrefix(r.URL.Path, "/sessions") || strings.HasPrefix(r.URL.Path, "/runs") {
+		if r.URL.Path == "/" || strings.HasPrefix(r.URL.Path, "/sessions") || strings.HasPrefix(r.URL.Path, "/runs") || strings.HasPrefix(r.URL.Path, "/openclaw") || strings.HasPrefix(r.URL.Path, "/agents") {
 			f, err := staticFiles.Open("static/index.html")
 			if err != nil {
 				http.Error(w, "index.html not found", http.StatusInternalServerError)