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>

2 files changed, 0 insertions, 28 deletions

diff --git a/dotfiles/system/.gnupg/gpg-agent.conf b/dotfiles/system/.gnupg/gpg-agent.conf
deleted file mode 100644
index 6448665..0000000
--- a/dotfiles/system/.gnupg/gpg-agent.conf
+++ /dev/null
@@ -1,18 +0,0 @@
-# Pinentry configuration
-pinentry-program /usr/bin/pinentry-dmenu
-pinentry-timeout 10
-allow-loopback-pinentry
-
-# Cache passphrases for entire login session (400 days)
-default-cache-ttl 34560000
-max-cache-ttl 34560000
-
-# Enable SSH support (use gpg-agent for SSH keys too)
-enable-ssh-support
-
-# Prevent external programs from clearing cache
-no-allow-external-cache
-
-# Keep running even when no connections
-keep-display
-keep-tty
diff --git a/dotfiles/system/.gnupg/pinentry-dmenu.conf b/dotfiles/system/.gnupg/pinentry-dmenu.conf
deleted file mode 100644
index ccd4d55..0000000
--- a/dotfiles/system/.gnupg/pinentry-dmenu.conf
+++ /dev/null
@@ -1,10 +0,0 @@
-asterisk= "* ";
-prompt = "$";
-font = "BerkeleyMono Nerd Font:size=12";
-prompt_fg = "#eeeeee";
-prompt_bg = "#d9904a";
-normal_fg = "#ffffff";
-normal_bg = "#000000";
-select_fg = "#eeeeee";
-select_bg = "#d9904a";
-desc_fg = "#eeeeee";