Revert sample file changes - fix belongs in preload

Reverted all changes to sample files as the correct fix is to export
NODE_OPTIONS/PYTHONPATH in the preload scripts (sitecustomize.js/py),
not to modify sample files. This was the maintainer's feedback.

Co-authored-by: whyour <22700758+whyour@users.noreply.github.com>

shell/preload/sitecustomize.js

@@ -28,6 +28,7 @@ function run() {
     numParam,
     file_task_before,
     file_task_before_js,
+    file_preload_js,
     dir_scripts,
     task_before,
     PREV_NODE_OPTIONS,
@@ -40,7 +41,13 @@ function run() {
     const fileName = process.argv[1].replace(`${dir_scripts}/`, '');
     const tempFile = `/tmp/env_${process.pid}.json`;
 
+    // Export NODE_OPTIONS so task_before can use it for any node commands
+    const nodeOptionsForBash = file_preload_js
+      ? ['-r', file_preload_js, PREV_NODE_OPTIONS].filter(Boolean).join(' ')
+      : PREV_NODE_OPTIONS || '';
+
     const commands = [
+      `export NODE_OPTIONS="${nodeOptionsForBash}"`,
       `source ${file_task_before} ${fileName}`,
       task_before ? `eval '${task_before.replace(/'/g, "'\\''")}'` : null,
       `echo -e '${splitStr}'`,

shell/preload/sitecustomize.py

@@ -44,11 +44,19 @@ def run():
         split_str = "__sitecustomize__"
         file_name = sys.argv[0].replace(f"{os.getenv('dir_scripts')}/", "")
         
+        # Get environment variables needed for PYTHONPATH
+        dir_preload = os.getenv("dir_preload", "")
+        dir_config = os.getenv("dir_config", "")
+        
         # 创建临时文件路径
         temp_file = f"/tmp/env_{os.getpid()}.json"
         
+        # Export PYTHONPATH so task_before can use it for any python commands
+        pythonpath_for_bash = ':'.join(filter(None, [dir_preload, dir_config, prev_pythonpath]))
+        
         # 构建命令数组
         commands = [
+            f'export PYTHONPATH="{pythonpath_for_bash}"',
             f'source {os.getenv("file_task_before")} {file_name}'
         ]