chore: upload app/core/paths.py

app/core/paths.py

@@ -0,0 +1,45 @@
+"""Persistent disk path helpers.
+
+HF Spaces 免费版 `/data` 是持久卷挂载点 (即使容器重启也保留).
+在本地 dev 时, 退回到仓库内 `./data/`.
+"""
+from __future__ import annotations
+
+from pathlib import Path
+
+from app.config import settings
+
+
+def data_dir() -> Path:
+    """根数据目录 (确保存在)."""
+    p = Path(settings.data_dir).expanduser().resolve()
+    p.mkdir(parents=True, exist_ok=True)
+    return p
+
+
+def upload_dir() -> Path:
+    """用户上传的原始文件目录."""
+    p = data_dir() / "uploads"
+    p.mkdir(parents=True, exist_ok=True)
+    return p
+
+
+def sqlite_dir() -> Path:
+    """SQLite 文件 (元数据 + LangGraph checkpoint) 目录."""
+    p = data_dir() / "sqlite"
+    p.mkdir(parents=True, exist_ok=True)
+    return p
+
+
+def chroma_dir() -> Path:
+    """ChromaDB 持久化目录."""
+    p = data_dir() / "chroma"
+    p.mkdir(parents=True, exist_ok=True)
+    return p
+
+
+def hf_cache_dir() -> Path:
+    """HuggingFace 模型缓存目录 (避免重复下载)."""
+    p = data_dir() / ".cache" / "huggingface"
+    p.mkdir(parents=True, exist_ok=True)
+    return p