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'