修改了nanobot，往Hermes agent的风格走，进度1/3

app-instance/backend-old/nanobot/config/paths.py

@@ -0,0 +1,19 @@
+"""Path helpers shared by config and channel integrations."""
+
+from pathlib import Path
+
+from nanobot.config.loader import get_data_dir as _get_data_dir
+
+
+def get_data_dir() -> Path:
+    """Return the global nanobot data directory (~/.nanobot)."""
+    return _get_data_dir()
+
+
+def get_media_dir(channel: str | None = None) -> Path:
+    """Return the media directory, optionally namespaced by channel."""
+    base = get_data_dir() / "media"
+    if channel:
+        base = base / str(channel)
+    base.mkdir(parents=True, exist_ok=True)
+    return base