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/frontend/app/(app)/files/page.tsx

@@ -18,18 +18,21 @@ import {
   FileArchive,
   FileSpreadsheet,
 } from 'lucide-react';
+import ReactMarkdown from 'react-markdown';
+import remarkGfm from 'remark-gfm';
 import {
   browseWorkspace,
+  getWorkspaceFile,
   getWorkspaceDownloadUrl,
   uploadToWorkspace,
   deleteWorkspacePath,
   createWorkspaceDir,
   getAccessToken,
 } from '@/lib/api';
-import type { WorkspaceItem } from '@/lib/api';
+import type { WorkspaceFileContent, WorkspaceItem } from '@/lib/api';
 import { Button } from '@/components/ui/button';
 import { ScrollArea } from '@/components/ui/scroll-area';
-import { pickAppText } from '@/lib/i18n/core';
+import { type AppLocale, pickAppText } from '@/lib/i18n/core';
 import { useAppI18n } from '@/lib/i18n/provider';
 
 export default function FilesPage() {
@@ -41,6 +44,9 @@ export default function FilesPage() {
   const [uploadProgress, setUploadProgress] = useState(0);
   const [showMkdir, setShowMkdir] = useState(false);
   const [newDirName, setNewDirName] = useState('');
+  const [selectedFile, setSelectedFile] = useState<WorkspaceFileContent | null>(null);
+  const [previewLoading, setPreviewLoading] = useState(false);
+  const [previewError, setPreviewError] = useState<string | null>(null);
   const fileInputRef = useRef<HTMLInputElement>(null);
   const mkdirInputRef = useRef<HTMLInputElement>(null);
 
@@ -50,6 +56,8 @@ export default function FilesPage() {
       const data = await browseWorkspace(path);
       setItems(data.items);
       setCurrentPath(data.path);
+      setSelectedFile(null);
+      setPreviewError(null);
     } catch {
       // ignore
     } finally {
@@ -65,6 +73,20 @@ export default function FilesPage() {
     load(path);
   };
 
+  const openFile = async (item: WorkspaceItem) => {
+    if (item.type !== 'file') return;
+    setPreviewLoading(true);
+    setPreviewError(null);
+    try {
+      setSelectedFile(await getWorkspaceFile(item.path));
+    } catch (err: any) {
+      setPreviewError(err.message || pickAppText(locale, '加载文件失败', 'Failed to load file'));
+      setSelectedFile(null);
+    } finally {
+      setPreviewLoading(false);
+    }
+  };
+
   const handleDelete = async (item: WorkspaceItem) => {
     const label = item.type === 'directory'
       ? pickAppText(locale, '文件夹', 'folder')
@@ -79,6 +101,9 @@ export default function FilesPage() {
     try {
       await deleteWorkspacePath(item.path);
       setItems((prev) => prev.filter((i) => i.path !== item.path));
+      if (selectedFile?.path === item.path) {
+        setSelectedFile(null);
+      }
     } catch {
       // ignore
     }
@@ -165,7 +190,7 @@ export default function FilesPage() {
   };
 
   return (
-    <div className="max-w-4xl mx-auto p-6">
+    <div className="mx-auto max-w-7xl p-6">
       {/* Header */}
       <div className="flex items-center justify-between mb-4">
         <h1 className="text-2xl font-bold">{pickAppText(locale, '文件管理', 'Files')}</h1>
@@ -280,84 +305,191 @@ export default function FilesPage() {
         </div>
       )}
 
-      {/* File list */}
-      {loading && items.length === 0 ? (
-        <div className="flex items-center justify-center py-20 text-muted-foreground">
-          <Loader2 className="w-6 h-6 animate-spin" />
+      <div className="grid gap-4 lg:grid-cols-[minmax(360px,440px)_minmax(0,1fr)]">
+        {/* File list */}
+        <div className="min-h-[520px] rounded-lg border border-border bg-card">
+          {loading && items.length === 0 ? (
+            <div className="flex items-center justify-center py-20 text-muted-foreground">
+              <Loader2 className="w-6 h-6 animate-spin" />
+            </div>
+          ) : items.length === 0 ? (
+            <div className="flex flex-col items-center justify-center py-20 text-muted-foreground">
+              <FolderOpen className="w-12 h-12 mb-4 opacity-50" />
+              <p className="text-lg font-medium">{pickAppText(locale, '空文件夹', 'Empty folder')}</p>
+              <p className="text-sm">{pickAppText(locale, '点击上方"上传"或"新建文件夹"按钮开始使用', 'Use "Upload" or "New folder" above to get started')}</p>
+            </div>
+          ) : (
+            <ScrollArea className="h-[calc(100vh-15rem)] min-h-[520px]">
+              <div className="space-y-1 p-2">
+                {items.map((item) => (
+                  <button
+                    key={item.path}
+                    type="button"
+                    className={`group flex w-full items-center gap-3 rounded-lg border px-3 py-2.5 text-left transition-colors hover:bg-accent/30 ${
+                      selectedFile?.path === item.path ? 'border-primary bg-accent/40' : 'border-border bg-card'
+                    }`}
+                    onClick={() => {
+                      if (item.type === 'directory') {
+                        navigateTo(item.path);
+                      } else {
+                        void openFile(item);
+                      }
+                    }}
+                  >
+                    <div className="flex-shrink-0">
+                      {item.type === 'directory' ? (
+                        <Folder className="w-5 h-5 text-blue-500" />
+                      ) : (
+                        <FileIcon name={item.name} contentType={item.content_type} />
+                      )}
+                    </div>
+
+                    <div className="min-w-0 flex-1">
+                      <div className="truncate text-sm font-medium">{item.name}</div>
+                      <p className="text-xs text-muted-foreground">
+                        {item.type === 'file' && formatSize(item.size)}
+                        {item.modified && (
+                          <>
+                            {item.type === 'file' && ' · '}
+                            {formatDate(item.modified)}
+                          </>
+                        )}
+                      </p>
+                    </div>
+
+                    <div className="flex items-center gap-1 opacity-0 transition-opacity group-hover:opacity-100">
+                      {item.type === 'file' && (
+                        <span
+                          role="button"
+                          tabIndex={0}
+                          className="inline-flex h-7 w-7 items-center justify-center rounded-md hover:bg-accent"
+                          onClick={(event) => {
+                            event.stopPropagation();
+                            void handleDownload(item);
+                          }}
+                          onKeyDown={(event) => {
+                            if (event.key === 'Enter' || event.key === ' ') {
+                              event.preventDefault();
+                              event.stopPropagation();
+                              void handleDownload(item);
+                            }
+                          }}
+                          title={pickAppText(locale, '下载', 'Download')}
+                        >
+                          <Download className="w-4 h-4" />
+                        </span>
+                      )}
+                      <span
+                        role="button"
+                        tabIndex={0}
+                        className="inline-flex h-7 w-7 items-center justify-center rounded-md text-destructive hover:bg-accent hover:text-destructive"
+                        onClick={(event) => {
+                          event.stopPropagation();
+                          void handleDelete(item);
+                        }}
+                        onKeyDown={(event) => {
+                          if (event.key === 'Enter' || event.key === ' ') {
+                            event.preventDefault();
+                            event.stopPropagation();
+                            void handleDelete(item);
+                          }
+                        }}
+                        title={pickAppText(locale, '删除', 'Delete')}
+                      >
+                        <Trash2 className="w-4 h-4" />
+                      </span>
+                    </div>
+                  </button>
+                ))}
+              </div>
+            </ScrollArea>
+          )}
         </div>
-      ) : items.length === 0 ? (
-        <div className="flex flex-col items-center justify-center py-20 text-muted-foreground">
-          <FolderOpen className="w-12 h-12 mb-4 opacity-50" />
-          <p className="text-lg font-medium">{pickAppText(locale, '空文件夹', 'Empty folder')}</p>
-          <p className="text-sm">{pickAppText(locale, '点击上方"上传"或"新建文件夹"按钮开始使用', 'Use "Upload" or "New folder" above to get started')}</p>
+
+        <FilePreviewPanel
+          file={selectedFile}
+          loading={previewLoading}
+          error={previewError}
+          formatSize={formatSize}
+          formatDate={formatDate}
+          downloadUrl={selectedFile ? getWorkspaceDownloadUrl(selectedFile.path) : null}
+          locale={locale}
+        />
+      </div>
+    </div>
+  );
+}
+
+function FilePreviewPanel({
+  file,
+  loading,
+  error,
+  formatSize,
+  formatDate,
+  downloadUrl,
+  locale,
+}: {
+  file: WorkspaceFileContent | null;
+  loading: boolean;
+  error: string | null;
+  formatSize: (bytes: number | null) => string;
+  formatDate: (iso: string) => string;
+  downloadUrl: string | null;
+  locale: AppLocale;
+}) {
+  return (
+    <div className="min-h-[520px] rounded-lg border border-border bg-card p-4">
+      {loading ? (
+        <div className="flex h-[420px] items-center justify-center text-muted-foreground">
+          <Loader2 className="h-6 w-6 animate-spin" />
+        </div>
+      ) : error ? (
+        <div className="flex h-[420px] items-center justify-center text-center text-sm text-destructive">{error}</div>
+      ) : !file ? (
+        <div className="flex h-[420px] flex-col items-center justify-center text-center text-muted-foreground">
+          <FileText className="mb-3 h-10 w-10 opacity-50" />
+          <p className="text-sm font-medium">{pickAppText(locale, '点击左侧文件查看内容', 'Click a file to preview its contents')}</p>
         </div>
       ) : (
-        <ScrollArea className="h-[calc(100vh-14rem)]">
-          <div className="space-y-1">
-            {items.map((item) => (
-              <div
-                key={item.path}
-                className="flex items-center gap-3 px-4 py-2.5 rounded-lg border border-border bg-card hover:bg-accent/30 transition-colors group"
-              >
-                {/* Icon */}
-                <div className="flex-shrink-0">
-                  {item.type === 'directory' ? (
-                    <Folder className="w-5 h-5 text-blue-500" />
-                  ) : (
-                    <FileIcon name={item.name} contentType={item.content_type} />
-                  )}
-                </div>
-
-                {/* Name - clickable for directories */}
-                <div className="flex-1 min-w-0">
-                  {item.type === 'directory' ? (
-                    <button
-                      onClick={() => navigateTo(item.path)}
-                      className="text-sm font-medium truncate hover:underline text-left block w-full"
-                    >
-                      {item.name}
-                    </button>
-                  ) : (
-                    <p className="text-sm font-medium truncate">{item.name}</p>
-                  )}
-                  <p className="text-xs text-muted-foreground">
-                    {item.type === 'file' && formatSize(item.size)}
-                    {item.modified && (
-                      <>
-                        {item.type === 'file' && ' · '}
-                        {formatDate(item.modified)}
-                      </>
-                    )}
-                  </p>
-                </div>
-
-                {/* Actions */}
-                <div className="flex items-center gap-1 opacity-0 group-hover:opacity-100 transition-opacity">
-                  {item.type === 'file' && (
-                    <Button
-                      variant="ghost"
-                      size="icon"
-                      className="h-7 w-7"
-                      onClick={() => handleDownload(item)}
-                      title={pickAppText(locale, '下载', 'Download')}
-                    >
-                      <Download className="w-4 h-4" />
-                    </Button>
-                  )}
-                  <Button
-                    variant="ghost"
-                    size="icon"
-                    className="h-7 w-7 text-destructive hover:text-destructive"
-                    onClick={() => handleDelete(item)}
-                    title={pickAppText(locale, '删除', 'Delete')}
-                  >
-                    <Trash2 className="w-4 h-4" />
-                  </Button>
-                </div>
-              </div>
-            ))}
+        <div className="space-y-3">
+          <div className="flex flex-wrap items-start justify-between gap-3 border-b border-border pb-3">
+            <div className="min-w-0">
+              <h2 className="break-all text-base font-semibold">{file.name}</h2>
+              <p className="mt-1 text-xs text-muted-foreground">
+                {formatSize(file.size)} · {formatDate(file.modified)} · {file.content_type}
+                {file.is_truncated ? ` · ${pickAppText(locale, '仅预览前 1MB', 'Showing first 1MB')}` : ''}
+              </p>
+            </div>
+            {downloadUrl && (
+              <Button variant="outline" size="sm" asChild>
+                <a href={downloadUrl}>
+                  <Download className="mr-2 h-4 w-4" />
+                  {pickAppText(locale, '下载', 'Download')}
+                </a>
+              </Button>
+            )}
           </div>
-        </ScrollArea>
+
+          {isImage(file) && downloadUrl ? (
+            <div className="flex max-h-[620px] items-start justify-center overflow-auto rounded-md border border-border bg-muted/20 p-3">
+              {/* eslint-disable-next-line @next/next/no-img-element */}
+              <img src={downloadUrl} alt={file.name} className="max-h-[580px] max-w-full object-contain" />
+            </div>
+          ) : file.is_binary ? (
+            <div className="flex h-[360px] flex-col items-center justify-center text-center text-muted-foreground">
+              <FileArchive className="mb-3 h-10 w-10 opacity-50" />
+              <p className="text-sm font-medium">{pickAppText(locale, '该文件不能直接预览', 'This file cannot be previewed')}</p>
+            </div>
+          ) : isMarkdown(file) ? (
+            <div className="prose prose-sm max-h-[620px] max-w-none overflow-auto text-black prose-a:text-black prose-code:text-black prose-headings:text-black prose-li:text-black prose-p:text-black prose-pre:bg-muted prose-pre:text-black prose-strong:text-black [&>*:first-child]:mt-0 [&>*:last-child]:mb-0">
+              <ReactMarkdown remarkPlugins={[remarkGfm]}>{file.content || ''}</ReactMarkdown>
+            </div>
+          ) : (
+            <pre className="max-h-[620px] overflow-auto whitespace-pre-wrap rounded-md border border-border bg-background p-4 text-xs leading-5 text-black">
+              {file.content || ''}
+            </pre>
+          )}
+        </div>
       )}
     </div>
   );
@@ -383,3 +515,11 @@ function FileIcon({ name, contentType }: { name: string; contentType?: string })
   }
   return <FileText className="w-5 h-5 text-muted-foreground" />;
 }
+
+function isImage(file: WorkspaceFileContent): boolean {
+  return file.content_type.startsWith('image/');
+}
+
+function isMarkdown(file: WorkspaceFileContent): boolean {
+  return file.path.toLowerCase().endsWith('.md') || file.content_type.includes('markdown');
+}