feat: 将项目从nano重命名为beaver并更新相关配置

- 将所有环境变量前缀从NANO_改为BEAVER_
- 更新README.md文档内容，包括项目介绍、组件说明和快速开始指南
- 修改.gitignore文件，添加auth-portal运行时路径排除规则
- 更新app-instance镜像标签从nano/app-instance改为beaver/app-instance
- 增强技能安全检查器，支持工具前缀白名单功能
- 添加技能草稿重新检查安全性API端点
- 扩展证据选择器，收集工具调用名称用于技能学习
- 改进技能合成器，基于实际调用的工具生成工具提示
- 优化路由超时处理机制，增加重试逻辑
- 更新后端架构文档，添加可视化入口和基础概念说明
- 实现在WebSocket消息中传递工具迭代次数信息

app-instance/backend/beaver/skills/learning/evidence.py

@@ -42,6 +42,8 @@ class EvidenceSelector:
         resolved_session_ids: list[str] = list(dict.fromkeys(session_ids or []))
         task_summaries: list[str] = []
         session_excerpts: list[str] = []
+        tool_names: list[str] = []
+        selected_tool_names: list[str] = []
         for run_id in run_ids:
             record = runs_by_id.get(run_id)
             if record is None:
@@ -56,12 +58,19 @@ class EvidenceSelector:
                 excerpt = self._session_excerpt(record.session_id, run_id)
                 if excerpt:
                     session_excerpts.append(excerpt)
+                run_tool_names, run_selected_tool_names = self._run_tool_names(record.session_id, run_id)
+                tool_names.extend(run_tool_names)
+                selected_tool_names.extend(run_selected_tool_names)
         return EvidencePacket(
             run_ids=resolved_run_ids,
             session_ids=resolved_session_ids,
             task_summaries=task_summaries[:8],
             session_excerpts=session_excerpts[:6],
-            metadata={"bounded": True},
+            metadata={
+                "bounded": True,
+                "tool_names": _unique_strings(tool_names),
+                "selected_tool_names": _unique_strings(selected_tool_names),
+            },
         )
 
     def _session_excerpt(self, session_id: str, run_id: str) -> str:
@@ -74,3 +83,37 @@ class EvidenceSelector:
                 continue
             visible.append(f"{event.role}: {event.content.strip()}")
         return "\n".join(visible[:12])[:2000]
+
+    def _run_tool_names(self, session_id: str, run_id: str) -> tuple[list[str], list[str]]:
+        if self.session_manager is None:
+            return [], []
+
+        names: list[str] = []
+        selected_names: list[str] = []
+        for event in self.session_manager.get_run_event_records(session_id, run_id):
+            if event.tool_name:
+                names.append(event.tool_name)
+            if event.tool_calls:
+                for call in event.tool_calls:
+                    if not isinstance(call, dict):
+                        continue
+                    name = call.get("name")
+                    function = call.get("function")
+                    if not name and isinstance(function, dict):
+                        name = function.get("name")
+                    if name:
+                        names.append(str(name))
+            if event.event_type == "tool_selection_snapshotted" and isinstance(event.event_payload, dict):
+                selected = event.event_payload.get("tool_names")
+                if isinstance(selected, list):
+                    selected_names.extend(str(item) for item in selected if str(item).strip())
+        return _unique_strings(names), _unique_strings(selected_names)
+
+
+def _unique_strings(values: list[str]) -> list[str]:
+    result: list[str] = []
+    for value in values:
+        cleaned = str(value).strip()
+        if cleaned and cleaned not in result:
+            result.append(cleaned)
+    return result