xiaoli-cli 7.0.0: 重构底层架构 + 移除工具截断

- 重构 core/ 底层 (7文件): app/runner/engine/parser/history/safety/display
- FC原生调用为主，prompt-JSON保底
- 移除所有工具返回截断 (ai_search/git_tools/cmd_executor/browser_auto/network_tools/sub_agent/tool_search)
- 删除无用文件 (旧服务器/WebUI/彩蛋/启动器等21个文件)
- 清理 constants.py 死代码
- 版本号更新为 7.0.0

core/history.py

@@ -0,0 +1,84 @@
+"""线程安全对话历史"""
+import json
+import threading
+from .types import Message
+
+
+class History:
+    def __init__(self, max_size=999999):
+        self._msgs = []
+        self._lock = threading.RLock()
+        self._max = max_size
+
+    def add_user(self, text):
+        with self._lock:
+            self._msgs.append(Message("user", text))
+            self._trim()
+
+    def add_assistant(self, text, tool_calls=None):
+        with self._lock:
+            m = Message("assistant", text)
+            if tool_calls:
+                m.tool_calls = tool_calls
+            self._msgs.append(m)
+            self._trim()
+
+    def add_tool(self, call_id, name, result):
+        with self._lock:
+            self._msgs.append(Message("tool", result, tool_call_id=call_id, name=name))
+            self._trim()
+
+    def add_cancel(self, name, args):
+        with self._lock:
+            self._msgs.append(Message("user", f"工具 {name} 已取消。参数: {args}"))
+            self._trim()
+
+    def _trim(self):
+        if len(self._msgs) > self._max:
+            self._msgs = self._msgs[-self._max:]
+
+    def render(self, system_prompt="", current=None, fc=False):
+        """渲染为消息列表。fc=True 用 role:tool，否则工具结果用 role:user"""
+        with self._lock:
+            result = []
+            if system_prompt:
+                result.append({"role": "system", "content": system_prompt})
+            for m in self._msgs:
+                if m.role == "tool" and not fc:
+                    result.append({"role": "user", "content": m.content})
+                else:
+                    entry = {"role": m.role, "content": m.content}
+                    if fc and m.role == "tool" and m.tool_call_id:
+                        entry["tool_call_id"] = m.tool_call_id
+                        if m.name:
+                            entry["name"] = m.name
+                    if fc and m.role == "assistant" and m.tool_calls:
+                        # content 为空时设为 None（OpenAI 规范：有 tool_calls 时 content 可为 null）
+                        if not entry.get("content"):
+                            entry["content"] = None
+                        # arguments 必须是 JSON 字符串（OpenAI 规范）
+                        entry["tool_calls"] = [
+                            {"id": tc.id, "type": "function",
+                             "function": {
+                                 "name": tc.name,
+                                 "arguments": json.dumps(tc.arguments, ensure_ascii=False) if tc.arguments
+                                              else json.dumps({"args": tc.args}, ensure_ascii=False)
+                             }}
+                            for tc in m.tool_calls
+                        ]
+                    result.append(entry)
+            if current:
+                result.append({"role": "user", "content": current})
+            return result
+
+    def snapshot(self):
+        with self._lock:
+            return list(self._msgs)
+
+    def clear(self):
+        with self._lock:
+            self._msgs.clear()
+
+    def __len__(self):
+        with self._lock:
+            return len(self._msgs)