fix super admin pi cwd double-prefixing absolute paths

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

src/servers/api/pi/websocket.ts

@@ -40,7 +40,11 @@ const resolveCwd = (email: string, role: string, cwd?: string) => {
   const root = getHomeDirForRole(email, role);
   if (!cwd || cwd === '~') return root;
   if (cwd.startsWith('~/')) return join(root, cwd.slice(2));
-  if (cwd.startsWith('/')) return join(root, cwd.slice(1));
+  if (cwd.startsWith('/')) {
+    // Super Admin: trust absolute paths as-is
+    if (role === 'Super Admin') return cwd;
+    return join(root, cwd.slice(1));
+  }
   return join(root, cwd);
 };