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, 112 deletions

diff --git a/dotfiles/system/.config/rofi/config.rasi b/dotfiles/system/.config/rofi/config.rasi
deleted file mode 100644
index 3f50cc6..0000000
--- a/dotfiles/system/.config/rofi/config.rasi
+++ /dev/null
@@ -1,6 +0,0 @@
-configuration {
-    show-icons: true;
-    dpi: 1;
-}
-
-@theme "~/.config/rofi/themes/rounded-gray-dark.rasi"
diff --git a/dotfiles/system/.config/rofi/themes/rounded-gray-dark.rasi b/dotfiles/system/.config/rofi/themes/rounded-gray-dark.rasi
deleted file mode 100644
index de5bbc3..0000000
--- a/dotfiles/system/.config/rofi/themes/rounded-gray-dark.rasi
+++ /dev/null
@@ -1,106 +0,0 @@
-/* ROFI THEME - Matched to dunst notifications */
-/* Based on: Newman Sanchez (https://github.com/newmanls) */
-
-* {
-    bg0:    #383c4af0;
-    bg1:    #2d303c;
-    bg2:    #4a4e5c80;
-    bg3:    #2d303c;
-    fg0:    #cdd1dc;
-    fg1:    #ffffff;
-    fg2:    #969696;
-    fg3:    #4a4e5c;
-
-    font:   "FiraCode Nerd Font Mono 10";
-
-    background-color:   transparent;
-    text-color:         @fg0;
-
-    margin:     0px;
-    padding:    0px;
-    spacing:    0px;
-}
-
-window {
-    location:       north;
-    y-offset:       calc(50% - 176px);
-    width:          480;
-    border-radius:  10px;
-    border:         1px;
-    border-color:   @bg1;
-
-    background-color:   @bg0;
-}
-
-mainbox {
-    padding:    12px;
-}
-
-inputbar {
-    background-color:   @bg1;
-    border-color:       @bg3;
-
-    border:         1px;
-    border-radius:  6px;
-
-    padding:    12px 20px;
-    spacing:    8px;
-    children:   [ prompt, entry ];
-}
-
-prompt {
-    text-color: @fg2;
-}
-
-entry {
-    placeholder:        "Search";
-    placeholder-color:  @fg3;
-}
-
-message {
-    margin:             12px 0 0;
-    border-radius:      6px;
-    border-color:       @bg2;
-    background-color:   @bg2;
-}
-
-textbox {
-    padding:    8px 24px;
-}
-
-listview {
-    background-color:   transparent;
-
-    margin:     12px 0 0;
-    lines:      8;
-    columns:    1;
-
-    fixed-height: false;
-}
-
-element {
-    padding:        8px 16px;
-    spacing:        8px;
-    border-radius:  6px;
-}
-
-element normal active {
-    text-color: @bg3;
-}
-
-element alternate active {
-    text-color: @bg3;
-}
-
-element selected normal, element selected active {
-    background-color:   @bg3;
-}
-
-element-icon {
-    size:           1em;
-    vertical-align: 0.5;
-}
-
-element-text {
-    text-color: inherit;
-}