Remove user message check for Qwen model

Removed the logic to ensure at least one user message is included in recent messages to avoid Qwen model error.

internal/agent/memory_compressor.go

@@ -345,29 +345,8 @@ func (mc *MemoryCompressor) adjustRecentStartForToolCalls(msgs []ChatMessage, re
 		adjusted--
 	}
 
-	// Ensure at least one user message is included in recent messages to avoid Qwen model error
-	// Qwen models require a user message in the message array, otherwise they return:
-	// "No user query found in messages"
-	hasUserMessage := false
-	for i := adjusted; i < len(msgs); i++ {
-		if strings.EqualFold(msgs[i].Role, "user") {
-			hasUserMessage = true
-			break
-		}
-	}
-
-	// If no user message in recent messages, adjust backwards to include one
-	if !hasUserMessage {
-		for adjusted > 0 {
-			adjusted--
-			if strings.EqualFold(msgs[adjusted].Role, "user") {
-				break
-			}
-		}
-	}
-
 	if adjusted != recentStart {
-		mc.logger.Debug("adjusted recent window to keep tool call context and user message",
+		mc.logger.Debug("adjusted recent window to keep tool call context",
 			zap.Int("original_recent_start", recentStart),
 			zap.Int("adjusted_recent_start", adjusted),
 		)