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, 60 insertions, 0 deletions

diff --git a/dotfiles/common/.zsh/modules/Test/W01history.ztst b/dotfiles/common/.zsh/modules/Test/W01history.ztst
new file mode 100644
index 0000000..6ef9b11
--- /dev/null
+++ b/dotfiles/common/.zsh/modules/Test/W01history.ztst
@@ -0,0 +1,60 @@
+# Tests for BANG_HIST replacements
+
+%prep
+
+  if [[ -t 0 ]]; then print -u $ZTST_fd History tests write to /dev/tty; fi
+
+%test
+
+  $ZTST_testdir/../Src/zsh -fis <<<'
+  print one two three four five six seven eight nine ten
+  print !:$ !:10 !:9 !:1 !:0
+  print one two three four five six seven eight nine ten
+  print !:0-$ !:1-2
+  ' 2>/dev/null
+0:History word references
+>one two three four five six seven eight nine ten
+>ten ten nine one print
+>one two three four five six seven eight nine ten
+>print one two three four five six seven eight nine ten one two
+
+  $ZTST_testdir/../Src/zsh -fis <<<'
+  print line one of an arbitrary series
+  print issue two for some mystery sequence
+  print !-1:5-$
+  print !1:2
+  print !2:2
+  print !-3:1-$
+  ' 2>/dev/null
+0:History line numbering
+>line one of an arbitrary series
+>issue two for some mystery sequence
+>mystery sequence
+>one
+>two
+>mystery sequence
+
+  $ZTST_testdir/../Src/zsh -fis <<<'
+  print All metaphor, Malachi, stilts and all
+  print !1:2:s/,/\\\\?/ !1:2:s/m/shm/:s/,/\!/
+  print !1:2:&
+  print -l !1:2-3:gs/a/o/
+  ' 2>/dev/null
+0:History substitution
+>All metaphor, Malachi, stilts and all
+>metaphor? shmetaphor!
+>metaphor!
+>metophor,
+>Molochi,
+
+  $ZTST_testdir/../Src/zsh -fis <<<'
+  echo foo bar
+  echo $(!!) again
+  echo more $( !! )' 2>/dev/null
+0:Regression test for history references in command substitution
+>foo bar
+>foo bar again
+>more foo bar again
+*?*
+F:Check that a history bug introduced by workers/34160 is working again.
+# Discarded line of error output consumes prompts printed by "zsh -i".