fix(McpService): improve client connection handling with error logging

src/main/services/MCPService.ts

@@ -46,6 +46,7 @@ class McpService {
     // Check if we already have a client for this server configuration
     const existingClient = this.clients.get(serverKey)
     if (existingClient) {
+      try {
         // Check if the existing client is still connected
         const pingResult = await existingClient.ping()
         Logger.info(`[MCP] Ping result for ${server.name}:`, pingResult)
@@ -56,8 +57,11 @@ class McpService {
         } else {
           return existingClient
         }
+      } catch (error) {
+        Logger.error(`[MCP] Error pinging server ${server.name}:`, error)
+        this.clients.delete(serverKey)
+      }
     }
-
     // Create new client instance for each connection
     const client = new Client({ name: 'Cherry Studio', version: app.getVersion() }, { capabilities: {} })