feat(outlook): 添加Outlook集成功能支持

添加完整的Outlook MCP集成，包括邮件和日历功能，通过AuthZ模式进行认证和权限管理，
支持邮箱连接、断开、状态检查和数据同步等功能。

fix(config): 统一配置文件路径从.nanobot到.beaver

将配置文件路径从/root/.nanobot统一更改为/root/.beaver，更新Dockerfile中的环境变量定义，
确保所有组件使用一致的配置目录结构。

feat(agent): 添加代理删除功能和助手身份提示

为代理注册表添加delete_agent方法，实现代理的动态删除功能；同时添加海狸助手身份提示，
确保AI助手在交互中保持一致的身份认知。

feat(engine): 增强引擎循环并添加意图决策快照

扩展AgentLoop类，添加intent_agent_decision参数用于意图驱动的代理决策，并在会话中记录
决策快照，便于后续分析和调试。

feat(authz): 扩展认证客户端功能

为AuthzClient添加设置权限、用户注册、后端注册和Outlook设置管理等新方法，增强系统
的认证和授权能力。

app-instance/backend/beaver/skills/catalog/loader.py

@@ -67,7 +67,12 @@ class SkillsLoader:
         self.extra_dirs = [Path(item) for item in (extra_dirs or [])]
         self.skill_store = skill_store or SkillSpecStore(self.workspace)
 
-    def list_skills(self, *, filter_unavailable: bool = True) -> list[SkillRecord]:
+    def list_skills(
+        self,
+        *,
+        filter_unavailable: bool = True,
+        include_internal: bool = False,
+    ) -> list[SkillRecord]:
         """列出当前可见的 skills。
 
         优先级：
@@ -80,9 +85,11 @@ class SkillsLoader:
 
         found: dict[str, SkillRecord] = {}
 
-        for record in self.list_published_skills():
+        for record in self.list_published_skills(filter_unavailable=filter_unavailable):
             if record.name in found:
                 continue
+            if not include_internal and self._record_internal(record):
+                continue
             if filter_unavailable and not self._record_available(record):
                 continue
             found[record.name] = record
@@ -101,6 +108,8 @@ class SkillsLoader:
                 if name in found:
                     continue
                 frontmatter, body = parse_frontmatter(skill_file.read_text(encoding="utf-8"))
+                if not include_internal and _truthy(frontmatter.get("internal")):
+                    continue
                 normalized_frontmatter = dict(frontmatter)
                 record = SkillRecord(
                     name=name,
@@ -375,11 +384,15 @@ class SkillsLoader:
         return []
 
     def _find_record(self, name: str) -> SkillRecord | None:
-        for record in self.list_skills(filter_unavailable=False):
+        for record in self.list_skills(filter_unavailable=False, include_internal=True):
             if record.name == name:
                 return record
         return None
 
+    @staticmethod
+    def _record_internal(record: SkillRecord) -> bool:
+        return _truthy((record.frontmatter or {}).get("internal"))
+
     def _record_available(self, record: SkillRecord) -> bool:
         content = record.path.read_text(encoding="utf-8")
         frontmatter, _ = parse_frontmatter(content)
@@ -405,3 +418,9 @@ class SkillsLoader:
 def summarize_body(body: str) -> str:
     cleaned = " ".join(line.strip() for line in body.splitlines()[:3] if line.strip()).strip()
     return cleaned[:240]
+
+
+def _truthy(value: Any) -> bool:
+    if isinstance(value, bool):
+        return value
+    return str(value or "").strip().lower() in {"1", "true", "yes", "y", "on"}