Fix Transmission connection testing and API compatibility

- Updated TransmissionClient to use correct method names from transmission-promise
- Changed sessionGet to session() and sessionSet to sessionUpdate()
- Added robust error handling in connection test
- Improved logging for connection debugging
- Fixed error handling in TransmissionClient constructor

🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

modules/transmission-client.js

@@ -28,8 +28,14 @@ class TransmissionClient {
       this.dirMappings = config.remoteConfig.directoryMapping;
     }
     
-    // Initialize the connection
-    this.initializeConnection();
+    // Initialize the connection - but don't throw if it fails initially
+    // This allows the object to be created even if the connection fails
+    try {
+      this.initializeConnection();
+    } catch (error) {
+      console.error("Failed to initialize Transmission connection:", error.message);
+      // Don't throw - allow methods to handle connection retry logic
+    }
   }
 
   /**
@@ -64,13 +70,17 @@ class TransmissionClient {
    */
   async getStatus() {
     try {
+      // Use the session-stats method for basic connectivity check
       const sessionInfo = await this.client.sessionStats();
-      const version = await this.client.sessionGet();
+      
+      // Use the session-get method to get version info
+      // Note: In transmission-promise, this is 'session' not 'sessionGet'
+      const session = await this.client.session();
       
       return {
         connected: true,
-        version: version.version,
-        rpcVersion: version['rpc-version'],
+        version: session.version || "Unknown",
+        rpcVersion: session['rpc-version'] || "Unknown",
         downloadSpeed: sessionInfo.downloadSpeed,
         uploadSpeed: sessionInfo.uploadSpeed,
         torrentCount: sessionInfo.torrentCount,
@@ -446,7 +456,8 @@ class TransmissionClient {
    */
   async setSessionParams(params) {
     try {
-      await this.client.sessionSet(params);
+      // In transmission-promise, the method is sessionUpdate not sessionSet
+      await this.client.sessionUpdate(params);
       return {
         success: true,
         message: 'Session parameters updated successfully'

server.js

@@ -885,7 +885,15 @@ app.post('/api/transmission/remove', authenticateJWT, async (req, res) => {
 
 app.post('/api/transmission/test', authenticateJWT, async (req, res) => {
   try {
-    const { host, port, username, password } = req.body;
+    const { host, port, username, password, path: rpcPath } = req.body;
+    
+    // Debug info
+    console.log('Testing Transmission connection with params:', {
+      host: host || 'from config',
+      port: port || 'from config',
+      username: username ? 'provided' : 'from config',
+      path: rpcPath || 'from config',
+    });
     
     // Create a temporary client for testing
     const testConfig = {
@@ -894,26 +902,48 @@ app.post('/api/transmission/test', authenticateJWT, async (req, res) => {
         port: port || config.transmissionConfig.port,
         username: username || config.transmissionConfig.username,
         password: password || config.transmissionConfig.password,
-        path: config.transmissionConfig.path
+        path: rpcPath || config.transmissionConfig.path
+      },
+      // Also include remoteConfig to ensure proper remote handling
+      remoteConfig: {
+        // If host is provided and different from localhost, set isRemote to true
+        isRemote: host && host !== 'localhost' ? true : config.remoteConfig?.isRemote || false,
+        directoryMapping: config.remoteConfig?.directoryMapping || {}
       }
     };
     
-    const testClient = new TransmissionClient(testConfig);
-    const status = await testClient.getStatus();
+    // Log the actual test config (without password)
+    console.log('Test configuration:', {
+      host: testConfig.transmissionConfig.host,
+      port: testConfig.transmissionConfig.port,
+      path: testConfig.transmissionConfig.path,
+      isRemote: testConfig.remoteConfig.isRemote
+    });
     
-    if (status.connected) {
-      res.json({
-        success: true,
-        message: 'Successfully connected to Transmission server',
-        data: {
-          version: status.version,
-          rpcVersion: status.rpcVersion
-        }
-      });
-    } else {
-      res.status(400).json({
+    try {
+      const testClient = new TransmissionClient(testConfig);
+      const status = await testClient.getStatus();
+      
+      if (status.connected) {
+        res.json({
+          success: true,
+          message: 'Successfully connected to Transmission server',
+          data: {
+            version: status.version,
+            rpcVersion: status.rpcVersion
+          }
+        });
+      } else {
+        res.status(400).json({
+          success: false,
+          message: `Failed to connect: ${status.error}`
+        });
+      }
+    } catch (error) {
+      console.error('Error testing Transmission connection:', error);
+      res.status(500).json({
         success: false,
-        message: `Failed to connect: ${status.error}`
+        message: `Error testing connection: ${error.message}`
       });
     }
   } catch (error) {