Refactor HF_HUB_CACHE export to check for /data directory existence

bash_guofang

@@ -1,5 +1,7 @@
 alias claude='env -u TERM_PROGRAM https_proxy=http://localhost:3128 claude'
 alias codex="all_proxy=http://localhost:3128 codex --dangerously-bypass-approvals-and-sandbox"
 alias hf="env -u HF_HUB_OFFLINE all_proxy=http://localhost:3128 hf"
-export HF_HUB_CACHE=/data/guofang/.cache/huggingface/hub
+if [ -d /data ]; then
+    export HF_HUB_CACHE=/data/guofang/.cache/huggingface/hub
+fi
 export HF_HUB_OFFLINE=1