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, 78 deletions

diff --git a/dotfiles/system/.local/bin/get-arch-iso.sh b/dotfiles/system/.local/bin/get-arch-iso.sh
deleted file mode 100755
index 635034a..0000000
--- a/dotfiles/system/.local/bin/get-arch-iso.sh
+++ /dev/null
@@ -1,78 +0,0 @@
-#!/usr/bin/env bash
-# fetch-arch-iso.sh
-# Downloads the latest Arch ISO + signature, checks GPG key, verifies the download.
-
-set -u
-set -o pipefail
-
-# CONFIGURATION
-BASE_DIR="${HOME}/downloads/isos"
-ISO_NAME="archlinux-x86_64.iso"
-SIG_NAME="${ISO_NAME}.sig"
-ISO_URL="https://geo.mirror.pkgbuild.com/iso/latest/${ISO_NAME}"
-SIG_URL="https://geo.mirror.pkgbuild.com/iso/latest/${SIG_NAME}"
-# The “Arch Linux Master Key” is what signs the ISO. We look for its name in your keyring.
-ARCH_KEY_SEARCH="Arch Linux Master Key"
-
-# 1) Build target directory, e.g. ~/downloads/isos/archlinux.2025.08.22
-today=$(date +%Y.%m.%d)
-TARGET_DIR="${BASE_DIR}/archlinux.${today}"
-
-mkdir -p "${TARGET_DIR}" || {
-  echo "Error: could not create ${TARGET_DIR}" >&2
-  exit 1
-}
-
-# 2) A small helper to download with one retry
-download_with_retry() {
-  local url=$1 out=$2
-  echo " -> Downloading ${url} to ${out}"
-  if ! wget -q --show-progress -O "${out}" "${url}"; then
-    echo "   First attempt failed; retrying once..."
-    if ! wget -q --show-progress -O "${out}" "${url}"; then
-      echo "Error: failed to download ${url} after 2 tries."
-      echo "       Please check your network connectivity."
-      exit 1
-    fi
-  fi
-}
-
-# 3) Make sure GPG is installed (we assume gpg binary exists)
-if ! command -v gpg >/dev/null; then
-  echo "Error: gpg is not installed. Please install it and re-run."
-  exit 1
-fi
-
-# 4) Check for the Arch Linux signing key
-if ! gpg --list-keys "${ARCH_KEY_SEARCH}" >/dev/null 2>&1; then
-  echo "Warning: Arch Linux signing key not found in your keyring."
-  read -p "Install archlinux-keyring package now? [y/N] " ans
-  ans=${ans,,}  # tolower
-  if [[ "${ans}" == "y" || "${ans}" == "yes" ]]; then
-    sudo pacman -Sy --needed archlinux-keyring || {
-      echo "Error: could not install archlinux-keyring." >&2
-      exit 1
-    }
-  else
-    echo "Cannot verify ISO without the Arch key. Aborting."
-    exit 1
-  fi
-fi
-
-# 5) Download the ISO and its .sig
-download_with_retry "${ISO_URL}" "${TARGET_DIR}/${ISO_NAME}"
-download_with_retry "${SIG_URL}" "${TARGET_DIR}/${SIG_NAME}"
-
-# 6) Verify the ISO against the signature
-echo " -> Verifying the ISO with GPG..."
-if gpg --verify "${TARGET_DIR}/${SIG_NAME}" "${TARGET_DIR}/${ISO_NAME}"; then
-  echo
-  echo "SUCCESS: The ISO signature is valid."
-  echo "You can now burn or mount ${TARGET_DIR}/${ISO_NAME} with confidence."
-  exit 0
-else
-  echo
-  echo "ERROR: GPG signature verification failed!"
-  echo "       The downloaded ISO may be corrupted or tampered with."
-  exit 1
-fi