ASCII-only spinner frames and output (VM locale rendered braille as garbage)

The braille spinner frames and the em-dash separator are multibyte
UTF-8; on the VM session they rendered as changing random letters, not
a spinner. Frames are now the classic | / - \ cycle, the separator is
':', and the two user-facing info lines that carried em-dashes are
ASCII too. Verified under LANG=C LC_ALL=C in a pty: zero non-ASCII
bytes in the entire output.

setup.sh

@@ -220,7 +220,7 @@ if [[ -z "$SELINUX_OPT" ]]; then
     [[ "$choice" == "yes" ]] && SELINUX_DISABLED=true
     printf "\n"
     if findmnt -n -o FSTYPE / 2>/dev/null | grep -q btrfs; then
-        ok "Root filesystem is btrfs — snapshots + zstd compression will be set up."
+        ok "Root filesystem is btrfs: snapshots + zstd compression will be set up."
         BTRFS_SNAPPER=true
     else
         info "Root filesystem is not btrfs; skipping snapshot setup."
@@ -259,7 +259,7 @@ pause_if_debug
 if [[ -z "$DE" ]]; then
     step "4 Desktop environment"
     rule
-    color_gray "  Bare Fedora install — picking a DE is what gives you a graphical login."
+    color_gray "Bare Fedora install: picking a DE is what gives you a graphical login."
     choice=$(ui_choose "Desktop environment" "Select desktop environment:" \
               "None (TWM only, SDDM via TWM module)" \
               "GNOME (gdm)" "Plasma (sddm)" "XFCE (sddm)" "None (TWM only, SDDM via TWM module)")