moved from tauri to a server with embedded UI

server/src/state.rs

@@ -0,0 +1,30 @@
+use std::path::PathBuf;
+use std::sync::Mutex;
+use tokio::sync::watch;
+
+pub struct SessionState {
+    pub project_root: Mutex<Option<PathBuf>>,
+    pub cancel_tx: watch::Sender<bool>,
+    pub cancel_rx: watch::Receiver<bool>,
+}
+
+impl Default for SessionState {
+    fn default() -> Self {
+        let (cancel_tx, cancel_rx) = watch::channel(false);
+        Self {
+            project_root: Mutex::new(None),
+            cancel_tx,
+            cancel_rx,
+        }
+    }
+}
+
+impl SessionState {
+    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(|| "No project is currently open.".to_string())?;
+        Ok(root.clone())
+    }
+}