Add dotfiles integration module (fedora-dots)

New modules/user/dotfiles.sh behind a menu question ('Clone personal
dotfiles?', default no) and --dotfiles=yes|no flag.

Does a --bare clone of yuri/fedora-dots into ~/.cfg.git, checks the repo
out into $HOME with status.showUntrackedFiles=no, and handles an empty
repo gracefully (configures the alias, skips checkout). Existing
~/.cfg.git is left untouched (idempotent).

Fix proven in the harness: the module originally used a plain git clone,
which creates a working copy and breaks the git-dir alias — the same
failure YuKu hit manually; --bare is required.
Dispatch runs the dotfiles module before DE/TWM so configs are in place
when sessions are installed.

setup.sh

@@ -21,6 +21,7 @@ DE=""
 TWM=""
 SELINUX_OPT=""
 SNAPPER_OPT=""
+DOTFILES_OPT=""
 
 usage() {
     cat <<'EOF'
@@ -36,6 +37,7 @@ Options:
   --twm=NAME    chadwm | hyprland | mango | niri | none
   --selinux=X   keep | disabled   (asked, default keep)
   --snapper=X   yes | no          (asked when / is btrfs, default yes)
+  --dotfiles=X  yes | no          (clone personal dotfiles, default no)
   -y, --yes     never prompt (requires --de and --twm)
   -d, --debug   pause after each section instead of aborting on error
   -h, --help    show this help
@@ -59,6 +61,7 @@ for arg in "$@"; do
         --de=*)     DE="${arg#*=}" ;;
         --selinux=*) SELINUX_OPT="${arg#*=}" ;;
         --snapper=*) SNAPPER_OPT="${arg#*=}" ;;
+        --dotfiles=*) DOTFILES_OPT="${arg#*=}" ;;
         --twm=*)    TWM="${arg#*=}" ;;
         -h|--help)  usage; exit 0 ;;
         *)
@@ -256,9 +259,23 @@ case "${SELINUX_OPT:-}" in
 esac
 case "${SNAPPER_OPT:-}" in
     yes)   BTRFS_SNAPPER=true ;;
-    no|"") : ;;
+    no)    BTRFS_SNAPPER=false ;;   # explicit flag beats the interactive default
+    ""|keep) : ;;
     *) err "Unknown --snapper value: '$SNAPPER_OPT' (yes|no)"; exit 2 ;;
 esac
+
+DOTFILES=false
+if [[ -z "$DOTFILES_OPT" ]]; then
+    printf "\n"
+    choice=$(ask_yes_no "Clone personal dotfiles (fedora-dots) into \$HOME?" "no")
+    [[ "$choice" == "yes" ]] && DOTFILES=true
+else
+    case "$DOTFILES_OPT" in
+        yes) DOTFILES=true ;;
+        no)  : ;;
+        *) err "Unknown --dotfiles value: '$DOTFILES_OPT' (yes|no)"; exit 2 ;;
+    esac
+fi
 pause_if_debug
 
 #------------------------------------------
@@ -361,6 +378,11 @@ if [[ "$BTRFS_SNAPPER" == "true" ]]; then
     pause_if_debug
 fi
 
+if [[ "$DOTFILES" == "true" ]]; then
+    run_module "$SCRIPT_DIR/modules/user/dotfiles.sh"
+    pause_if_debug
+fi
+
 if [[ "$DE" != "none" ]]; then
     run_module "$SCRIPT_DIR/modules/de/${DE}.sh"
     pause_if_debug
@@ -378,7 +400,9 @@ step "7 Summary"
 rule
 ok "DE:  $DE"
 ok "TWM: $TWM"
-ok "SELinux: $([[ "$SELINUX_DISABLED" == "true" ]] && echo disabled || echo keeping)"; ok "Btrfs snapshots: $([[ "$BTRFS_SNAPPER" == "true" ]] && echo yes || echo skipped)"
+ok "SELinux: $([[ "$SELINUX_DISABLED" == "true" ]] && echo disabled || echo keeping)"
+ok "Btrfs snapshots: $([[ "$BTRFS_SNAPPER" == "true" ]] && echo yes || echo skipped)"
+ok "Dotfiles: $([[ "$DOTFILES" == "true" ]] && echo clone || echo no)"
 DM=$(detect_display_manager)
 ok "Display manager: ${DM:-none}"