Fix memory leaks in XML conversion: ensure xmlStreamParser.destroy() is invoked during teardown and replace addListener with on for conversion events to avoid accumulating listeners.

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Co-Authored-By: Codebuff <noreply@codebuff.com>

Author: brandonkachen

npm-app/src/client.ts

@@ -1348,6 +1348,8 @@ export class Client {
       this.cancelCurrentInput()
       this.currentOnChunk = undefined
 
+      xmlStreamParser.destroy()
+
       const additionalMessages = prompt
         ? [
             { role: 'user' as const, content: prompt },

npm-app/src/display/markdown-renderer.ts

@@ -101,7 +101,7 @@ export class MarkdownStreamRenderer {
         this.width = process.stdout.columns || this.width
       }
       // Use .once with bound handler tracker to avoid duplication
-      process.stdout.addListener('resize', this.resizeHandler)
+      process.stdout.on('resize', this.resizeHandler)
     }
   }