Fix shutdown requests

app/src/main/java/io/xpipe/app/beacon/BeaconRequestHandler.java

@@ -28,7 +28,8 @@ public class BeaconRequestHandler<T> implements HttpHandler {
 
     @Override
     public void handle(HttpExchange exchange) {
-        if (OperationMode.isInShutdown()) {
+        if (OperationMode.isInShutdown() && !beaconInterface.acceptInShutdown()) {
+            writeError(exchange, new BeaconClientErrorResponse("Daemon is currently in shutdown"), 400);
             return;
         }
 

beacon/src/main/java/io/xpipe/beacon/BeaconInterface.java

@@ -62,6 +62,10 @@ public abstract class BeaconInterface<T> {
         return (Class<T>) Class.forName(name);
     }
 
+    public boolean acceptInShutdown() {
+        return false;
+    }
+
     public boolean requiresCompletedStartup() {
         return true;
     }

beacon/src/main/java/io/xpipe/beacon/api/AskpassExchange.java

@@ -12,6 +12,11 @@ import java.util.UUID;
 
 public class AskpassExchange extends BeaconInterface<AskpassExchange.Request> {
 
+    @Override
+    public boolean acceptInShutdown() {
+        return true;
+    }
+
     @Override
     public String getPath() {
         return "/askpass";

beacon/src/main/java/io/xpipe/beacon/api/HandshakeExchange.java

@@ -11,6 +11,11 @@ import lombok.extern.jackson.Jacksonized;
 
 public class HandshakeExchange extends BeaconInterface<HandshakeExchange.Request> {
 
+    @Override
+    public boolean acceptInShutdown() {
+        return true;
+    }
+
     @Override
     public String getPath() {
         return "/handshake";