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, 0 insertions, 142 deletions

diff --git a/dotfiles/system/.zsh/modules/Src/signals.h b/dotfiles/system/.zsh/modules/Src/signals.h
deleted file mode 100644
index 41ac88c..0000000
--- a/dotfiles/system/.zsh/modules/Src/signals.h
+++ /dev/null
@@ -1,142 +0,0 @@
-/*
- * signals.h - header file for signals handling code
- *
- * This file is part of zsh, the Z shell.
- *
- * Copyright (c) 1992-1997 Paul Falstad
- * All rights reserved.
- *
- * Permission is hereby granted, without written agreement and without
- * license or royalty fees, to use, copy, modify, and distribute this
- * software and to distribute modified versions of this software for any
- * purpose, provided that the above copyright notice and the following
- * two paragraphs appear in all copies of this software.
- *
- * In no event shall Paul Falstad or the Zsh Development Group be liable
- * to any party for direct, indirect, special, incidental, or consequential
- * damages arising out of the use of this software and its documentation,
- * even if Paul Falstad and the Zsh Development Group have been advised of
- * the possibility of such damage.
- *
- * Paul Falstad and the Zsh Development Group specifically disclaim any
- * warranties, including, but not limited to, the implied warranties of
- * merchantability and fitness for a particular purpose.  The software
- * provided hereunder is on an "as is" basis, and Paul Falstad and the
- * Zsh Development Group have no obligation to provide maintenance,
- * support, updates, enhancements, or modifications.
- *
- */
-
-#define SIGNAL_HANDTYPE void (*)_((int))
-
-#ifndef HAVE_KILLPG
-# define killpg(pgrp,sig) kill(-(pgrp),sig)
-#endif
-
-#define SIGZERR   (SIGCOUNT+1)
-#define SIGDEBUG  (SIGCOUNT+2)
-#define VSIGCOUNT (SIGCOUNT+3)
-#define SIGEXIT    0
-
-#ifdef SV_BSDSIG
-# define SV_INTERRUPT SV_BSDSIG
-#endif
-
-/* If not a POSIX machine, then we create our *
- * own POSIX style signal sets functions.     */
-#ifndef POSIX_SIGNALS
-# define sigemptyset(s)    (*(s) = 0)
-# if NSIG == 32
-#  define sigfillset(s)    (*(s) = ~(sigset_t)0, 0)
-# else
-#  define sigfillset(s)    (*(s) = (1 << NSIG) - 1, 0)
-# endif
-# define sigaddset(s,n)    (*(s) |=  (1 << ((n) - 1)), 0)
-# define sigdelset(s,n)    (*(s) &= ~(1 << ((n) - 1)), 0)
-# define sigismember(s,n)  ((*(s) & (1 << ((n) - 1))) != 0)
-#endif   /* ifndef POSIX_SIGNALS */
- 
-#define child_block()      signal_block(sigchld_mask)
-#define child_unblock()    signal_unblock(sigchld_mask)
-
-#ifdef SIGWINCH
-# define winch_block()      signal_block(signal_mask(SIGWINCH))
-# define winch_unblock()    signal_unblock(signal_mask(SIGWINCH))
-#else
-# define winch_block()      0
-# define winch_unblock()    0
-#endif
-
-/* ignore a signal */
-#define signal_ignore(S)   signal(S, SIG_IGN)
-
-/* return a signal to it default action */
-#define signal_default(S)  signal(S, SIG_DFL)
-
-/* Use a circular queue to save signals caught during    *
- * critical sections of code.  You call queue_signals to *
- * start queueing, and unqueue_signals to process the    *
- * queue and stop queueing.  Since the kernel doesn't    *
- * queue signals, it is probably overkill for zsh to do  *
- * this, but it shouldn't hurt anything to do it anyway. */
-
-#define MAX_QUEUE_SIZE 128
-
-#define run_queued_signals() do { \
-    while (queue_front != queue_rear) {      /* while signals in queue */ \
-	sigset_t oset; \
-	queue_front = (queue_front + 1) % MAX_QUEUE_SIZE; \
-	oset = signal_setmask(signal_mask_queue[queue_front]); \
-	zhandler(signal_queue[queue_front]);  /* handle queued signal   */ \
-	signal_setmask(oset); \
-    } \
-} while (0)
-
-#ifdef DEBUG
-
-#define queue_signals()    (queue_in++, queueing_enabled++)
-
-#define unqueue_signals()  do { \
-    DPUTS(!queueing_enabled, "BUG: unqueue_signals called but not queueing"); \
-    --queue_in; \
-    if (!--queueing_enabled) run_queued_signals(); \
-} while (0)
-
-#define dont_queue_signals() do { \
-    queue_in = queueing_enabled; \
-    queueing_enabled = 0; \
-    run_queued_signals(); \
-} while (0)
-
-#define restore_queue_signals(q) do { \
-    DPUTS2(queueing_enabled && queue_in != q, \
-         "BUG: q = %d != queue_in = %d", q, queue_in); \
-    queue_in = (queueing_enabled = (q)); \
-} while (0)
-
-#else /* !DEBUG */
-
-#define queue_signals()    (queueing_enabled++)
-
-#define unqueue_signals()  do { \
-    if (!--queueing_enabled) run_queued_signals(); \
-} while (0)
-
-#define dont_queue_signals() do { \
-    queueing_enabled = 0; \
-    run_queued_signals(); \
-} while (0)
-
-#define restore_queue_signals(q) (queueing_enabled = (q))
-
-#endif /* DEBUG */
-
-#define queue_signal_level() queueing_enabled
-
-#ifdef BSD_SIGNALS
-#define signal_block(S) sigblock(S)
-#else
-extern sigset_t signal_block _((sigset_t));
-#endif  /* BSD_SIGNALS   */
-
-extern sigset_t signal_unblock _((sigset_t));