updates

.env.example

@@ -9,6 +9,9 @@ APP_PASSWORD=change-me
 SESSION_TTL_HOURS=720
 # Data dir: holds kisassistant.db (SQLite: users, sessions, chats, shares)
 DATA_DIR=./data
+# Local file CDN (avatars today, more namespaces tomorrow).
+# Dev default is a folder next to the codebase; NixOS points it under state dir.
+CDN_DIR=./cdn
 
 # Per-driver debug logging to stdout ([driver:name] lines).
 DRIVER_DEBUG=true