fix(command-handler): add echo-dedup for WS commands to prevent Discord relay

extension/src/command-handler.ts

@@ -109,6 +109,8 @@ export function handleWSCommand(ctx: CommandHandlerContext, data: { text?: strin
 
     // General text → send as user message to AG
     ctx.logToFile(`[WS-CMD] Sending text to AG: ${text.substring(0, 80)}`);
+    // Mark for echo-dedup: step-probe will skip relaying this back to Discord
+    ctx.recentDiscordSentTexts.set(text.trim(), Date.now());
     if (ctx.sdk) {
         try {
             ctx.sdk.cascade.sendPrompt(text);