huskies: merge 858

server/src/state.rs

@@ -3,6 +3,7 @@ use std::path::PathBuf;
 use std::sync::Mutex;
 use tokio::sync::watch;
 
+/// Global server session state: the open project root and a cancellation signal.
 pub struct SessionState {
     pub project_root: Mutex<Option<PathBuf>>,
     pub cancel_tx: watch::Sender<bool>,
@@ -21,6 +22,7 @@ impl Default for SessionState {
 }
 
 impl SessionState {
+    /// Return the currently open project root, or an error if no project is open.
     pub fn get_project_root(&self) -> Result<PathBuf, String> {
         let root_guard = self.project_root.lock().map_err(|e| e.to_string())?;
         let root = root_guard.as_ref().ok_or_else(|| {