refactor(dotfiles): rename system/ to common/ and remove unused configs

Rename dotfiles/system to dotfiles/common for clarity - indicates
shared dotfiles used across all desktop environments (DWM, Hyprland).

Removed config directories for uninstalled applications:
- ghostty (using different terminal)
- lf (using ranger instead)
- mopidy (using mpd instead)
- nitrogen (X11-only, obsolete for Wayland)
- pychess (not installed)
- JetBrains (not installed via archsetup)
- youtube-dl (using yt-dlp with different config location)

Kept audacious config for potential future use.

Updated all references in archsetup, CLAUDE.md, todo.org, and
validation.sh.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/dotfiles/common/.config/user-dirs.dirs b/dotfiles/common/.config/user-dirs.dirs
new file mode 100644
index 0000000..0db0cae
--- /dev/null
+++ b/dotfiles/common/.config/user-dirs.dirs
@@ -0,0 +1,15 @@
+# This file is written by xdg-user-dirs-update
+# If you want to change or add directories, just edit the line you're
+# interested in. All local changes will be retained on the next run.
+# Format is XDG_xxx_DIR="$HOME/yyy", where yyy is a shell-escaped
+# homedir-relative path, or XDG_xxx_DIR="/yyy", where /yyy is an
+# absolute path. No other format is supported.
+# 
+XDG_DESKTOP_DIR="$HOME/"
+XDG_DOWNLOAD_DIR="$HOME/downloads"
+XDG_TEMPLATES_DIR="$HOME/"
+XDG_PUBLICSHARE_DIR="$HOME/"
+XDG_DOCUMENTS_DIR="$HOME/documents"
+XDG_MUSIC_DIR="$HOME/music"
+XDG_PICTURES_DIR="$HOME/pictures"
+XDG_VIDEOS_DIR="$HOME/videos"