Document the session discovery paths

README.md

@@ -8,7 +8,7 @@ Part of the Moonarch ecosystem.
 - **greetd IPC** — Communicates via `$GREETD_SOCK` (length-prefixed JSON)
 - **User list** — Parsed from `/etc/passwd` (UID 1000–65533)
 - **Avatars** — AccountsService icons, `~/.face` fallback, default SVG with theme tinting
-- **Sessions** — Discovered from `/usr/share/wayland-sessions/` and `/usr/share/xsessions/`
+- **Sessions** — Discovered from `wayland-sessions/` and `xsessions/` in every `XDG_DATA_DIRS` entry, with `/usr/share` as fallback
 - **Last user/session** — Remembered in `/var/cache/moongreet/`
 - **Power actions** — Reboot / Shutdown via `loginctl`
 - **Layer Shell** — Fullscreen via gtk4-layer-shell (TOP layer)