feat: 增强 Agent 意图识别和上下文管理

- 新增 intent_router.py 意图路由模块
- 优化 context.py 上下文管理
- 增强 loop.py Agent 运行循环
- 更新 memory.py 记忆模块
- 修复 builtin.py 工具函数

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/agents/agent/memory.py

@@ -537,7 +537,7 @@ class AgentMemory:
             except:
                 pass
 
-        # Check if content contains tool_calls or tool_result markers
+        # Check if content contains tool_calls or tool_result markers, or is JSON
         # Format as Markdown (产品经理指定格式)
         entry_lines = [
             f"## 消息 {msg_count}",
@@ -553,7 +553,20 @@ class AgentMemory:
             entry_lines.append(f"工具结果: {content[len('[tool_result]'):]}")
             entry_lines.append(f"内容: ")
         else:
-            entry_lines.append(f"内容: {content}")
+            # Check if it's a JSON object (new format with content + tool_calls)
+            try:
+                data = json.loads(content)
+                if isinstance(data, dict):
+                    # New JSON format: might have content and/or tool_calls
+                    if "content" in data:
+                        entry_lines.append(f"内容: {data['content']}")
+                    if "tool_calls" in data:
+                        entry_lines.append(f"工具调用: {json.dumps(data['tool_calls'])}")
+                else:
+                    entry_lines.append(f"内容: {content}")
+            except (json.JSONDecodeError, TypeError):
+                # Not JSON, treat as regular content
+                entry_lines.append(f"内容: {content}")
 
         entry = "\n".join(entry_lines) + "\n\n"
 
@@ -631,6 +644,9 @@ class AgentMemory:
                 if line.startswith("工具调用:") and current_message is not None:
                     tool_calls_json = line.split(":", 1)[1].strip()
                     try:
+                        # Set role if not already set
+                        if not current_message.get("role"):
+                            current_message["role"] = "assistant"
                         current_message["tool_calls"] = json.loads(tool_calls_json)
                     except json.JSONDecodeError:
                         pass
@@ -641,6 +657,7 @@ class AgentMemory:
                     tool_result_json = line.split(":", 1)[1].strip()
                     try:
                         tool_result = json.loads(tool_result_json)
+                        current_message["role"] = "tool"  # Set role to tool
                         current_message["tool_call_id"] = tool_result.get("tool_call_id", "")
                         current_message["name"] = tool_result.get("name", "")
                         current_message["content"] = tool_result.get("content", "")