Version: 0.9.65.dev.260503

后端：
1. 阶段 1.5/1.6
收口 llm-service / rag-service，统一模型出口与检索基础设施入口，清退 backend/infra/llm 与 backend/infra/rag 旧实现；
2. 同步更新相关调用链与微服务迁移计划文档

backend/newAgent/shared/node_thinking.go

@@ -1,10 +1,10 @@
 package newagentshared
 
-import infrallm "github.com/LoveLosita/smartflow/backend/infra/llm"
+import llmservice "github.com/LoveLosita/smartflow/backend/services/llm"
 
-func ResolveThinkingMode(enabled bool) infrallm.ThinkingMode {
+func ResolveThinkingMode(enabled bool) llmservice.ThinkingMode {
 	if enabled {
-		return infrallm.ThinkingModeEnabled
+		return llmservice.ThinkingModeEnabled
 	}
-	return infrallm.ThinkingModeDisabled
+	return llmservice.ThinkingModeDisabled
 }