fix(run): keep json auth output clean

Author: OnlyYu1996

src/cortex-cli/src/agent_cmd/tests.rs

@@ -3,10 +3,9 @@
 #[cfg(test)]
 mod tests {
     use crate::agent_cmd::cli::{CopyArgs, ExportArgs};
-    use crate::agent_cmd::loader::{
-        load_builtin_agents, parse_frontmatter, read_file_with_encoding,
-    };
+    use crate::agent_cmd::loader::{load_builtin_agents, parse_frontmatter};
     use crate::agent_cmd::types::AgentMode;
+    use crate::utils::file::read_file_with_encoding;
 
     #[test]
     fn test_read_file_with_utf8() {

src/cortex-cli/src/main.rs

@@ -177,6 +177,7 @@ async fn main() -> Result<()> {
         };
 
         tracing_subscriber::fmt()
+            .with_writer(std::io::stderr)
             .with_env_filter(&filter_str)
             .init();
     }