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

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

@@ -0,0 +1,88 @@
+package de.tki.comfymodels.service;
+
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class InstallationPathTest {
+
+    @TempDir
+    Path tempDir;
+
+    @Test
+    void testStandardLayout() throws IOException {
+        Path customNodes = tempDir.resolve("custom_nodes");
+        Files.createDirectory(customNodes);
+        
+        File inputPath = tempDir.toFile();
+        File customNodesDir = findCustomNodes(inputPath);
+        
+        assertNotNull(customNodesDir);
+        assertEquals(customNodes.toAbsolutePath().toString(), customNodesDir.getAbsolutePath());
+    }
+
+    @Test
+    void testPortableLayout() throws IOException {
+        Path comfyDir = tempDir.resolve("ComfyUI");
+        Files.createDirectory(comfyDir);
+        Path customNodes = comfyDir.resolve("custom_nodes");
+        Files.createDirectory(customNodes);
+        
+        File inputPath = tempDir.toFile();
+        File customNodesDir = findCustomNodes(inputPath);
+        
+        assertNotNull(customNodesDir);
+        assertEquals(customNodes.toAbsolutePath().toString(), customNodesDir.getAbsolutePath());
+    }
+
+    @Test
+    void testDesktopAppLayout() throws IOException {
+        Path resources = tempDir.resolve("resources");
+        Files.createDirectory(resources);
+        Path comfyDir = resources.resolve("ComfyUI");
+        Files.createDirectory(comfyDir);
+        Path customNodes = comfyDir.resolve("custom_nodes");
+        Files.createDirectory(customNodes);
+        
+        File inputPath = tempDir.toFile();
+        File customNodesDir = findCustomNodes(inputPath);
+        
+        assertNotNull(customNodesDir);
+        assertEquals(customNodes.toAbsolutePath().toString(), customNodesDir.getAbsolutePath());
+    }
+
+    @Test
+    void testDirectSelection() throws IOException {
+        Path customNodes = tempDir.resolve("custom_nodes");
+        Files.createDirectory(customNodes);
+        
+        File inputPath = customNodes.toFile();
+        File customNodesDir = findCustomNodes(inputPath);
+        
+        assertNotNull(customNodesDir);
+        assertEquals(customNodes.toAbsolutePath().toString(), customNodesDir.getAbsolutePath());
+    }
+
+    /**
+     * Logic extracted from Main.java for testing
+     */
+    private File findCustomNodes(File inputPath) {
+        File c1 = new File(inputPath, "custom_nodes");
+        File c2 = new File(inputPath, "ComfyUI" + File.separator + "custom_nodes");
+        File c3 = new File(inputPath, "resources" + File.separator + "ComfyUI" + File.separator + "custom_nodes");
+        File c4 = inputPath;
+
+        if (c1.exists() && c1.isDirectory()) return c1;
+        if (c2.exists() && c2.isDirectory()) return c2;
+        if (c3.exists() && c3.isDirectory()) return c3;
+        if (c4.getName().equalsIgnoreCase("custom_nodes") && c4.isDirectory()) return c4;
+        
+        return null;
+    }
+}

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());
+    }
+}