session observer session close fixed, kill process fixed and optimized, git submodule path updated

src/modules/run_process.js

@@ -71,6 +71,9 @@ const run_app = async (app_path, app_port) => {
 }
 
 const kill_proc = (pid) => {
+    if (!is_proc_running(pid)) {
+        return
+    }
     if (process.platform === 'win32') {
         spawn('taskkill', ['/pid', pid, '/f', '/t'])
     }