feat: add root browserDialers tags for dialerProxy integration

Agent-Logs-Url: https://github.com/XTLS/Xray-core/sessions/808be5b1-7ed2-4309-87f1-18a808d6aba4

Co-authored-by: RPRX <63339210+RPRX@users.noreply.github.com>

transport/internet/browser_dialer/dialer.go

@@ -33,6 +33,7 @@ type task struct {
 
 var sockoptDialers map[string]*dialerInstance
 var dialerServers map[string]*dialerServer
+var dialerTags map[string]string
 var mu sync.RWMutex
 
 const browserDialerSubprotocol = "browser-dialer"
@@ -51,6 +52,37 @@ func HasBrowserDialerWithAddress(addr string) bool {
 	return ok
 }
 
+func GetAddressByTag(tag string) (string, bool) {
+	if tag == "" {
+		return "", false
+	}
+	mu.RLock()
+	defer mu.RUnlock()
+	addr, ok := dialerTags[tag]
+	return addr, ok
+}
+
+func ConfigureDialerTags(tags map[string]string) error {
+	next := make(map[string]string, len(tags))
+	for tag, addr := range tags {
+		if tag == "" {
+			return errors.New("browserDialers tag cannot be empty")
+		}
+		if addr == "" {
+			return errors.New("browserDialers url cannot be empty for tag: ", tag)
+		}
+		if err := EnsureDialerWithAddress(addr); err != nil {
+			return errors.New("invalid browserDialers entry for tag ", tag).Base(err)
+		}
+		next[tag] = addr
+	}
+
+	mu.Lock()
+	dialerTags = next
+	mu.Unlock()
+	return nil
+}
+
 type webSocketExtra struct {
 	Protocol string `json:"protocol,omitempty"`
 }