feat: restore missing Import Model List button and add REST bridge for ComfyUI integration

src/test/java/de/tki/comfymodels/service/RestBridgeServiceTest.java

@@ -0,0 +1,53 @@
+package de.tki.comfymodels.service;
+
+import de.tki.comfymodels.service.impl.RestBridgeService;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.util.concurrent.atomic.AtomicReference;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class RestBridgeServiceTest {
+
+    private RestBridgeService restBridge;
+    private final int testPort = 12346;
+    private final String testToken = "test-token";
+
+    @BeforeEach
+    void setUp() {
+        restBridge = new RestBridgeService();
+        restBridge.setPort(testPort);
+        restBridge.setApiToken(testToken);
+        restBridge.startServer();
+    }
+
+    @AfterEach
+    void tearDown() {
+        restBridge.stopServer();
+    }
+
+    @Test
+    void testWorkflowImport() throws Exception {
+        AtomicReference<String> receivedWorkflow = new AtomicReference<>();
+        restBridge.setWorkflowConsumer(receivedWorkflow::set);
+
+        String testJson = "{\"nodes\": []}";
+        HttpClient client = HttpClient.newHttpClient();
+        HttpRequest request = HttpRequest.newBuilder()
+                .uri(URI.create("http://127.0.0.1:" + testPort + "/import"))
+                .header("Authorization", "Bearer " + testToken)
+                .POST(HttpRequest.BodyPublishers.ofString(testJson))
+                .build();
+
+        HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
+
+        assertEquals(200, response.statusCode());
+        assertEquals(testJson, receivedWorkflow.get());
+    }
+}