chore: rollback mount path

runtime/src/runtime/mount.py

@@ -60,7 +60,7 @@ def start_rclone_mount() -> None:
             "rclone",
             "mount",
             REMOTE_BUCKET,
-            str(WORKSPACES_ROOT),
+            WORKSPACES_ROOT.as_posix(),
             "--allow-other",
             "--vfs-cache-mode", "full",
             "--vfs-cache-max-size", "20G",

runtime/src/runtime/process.py

@@ -24,7 +24,6 @@ from common.utils import get_free_port, start_process
 from runtime.mount import WORKSPACES_ROOT
 
 PUBLIC_BASE_URL = settings.public_base_url
-JUPYTER_PROCESS_CWD = Path("/app")
 
 
 class JupyterProcessRecord(TypedDict):
@@ -108,7 +107,7 @@ async def start_workspace(ws_id: str) -> dict:
             "--allow-root",
             f"--ServerApp.token={token}",
             f"--ServerApp.base_url={base_path}",
-            f"--ServerApp.root_dir={workspace_path}",
+            "--notebook-dir=.",
             "--ServerApp.terminals_enabled=False",
             "--NotebookApp.terminals_enabled=False",
             "--ServerApp.allow_origin=*",
@@ -118,11 +117,7 @@ async def start_workspace(ws_id: str) -> dict:
         ]
 
         try:
-            # Keep the server process cwd off the rclone/FUSE mount. Remote
-            # S3 directory refreshes can replace a virtual directory inode,
-            # leaving a long-lived cwd marked "(deleted)" and making
-            # os.getcwd() fail while Jupyter starts kernels or nbconvert.
-            process, log_file = start_process(cmd, JUPYTER_PROCESS_CWD)
+            process, log_file = start_process(cmd, workspace_path)
         except Exception as e:
             logger.error(f"Failed to start Jupyter for {ws_id}: {e}")
             raise HTTPException(