v0.5.4: installer UX polish — terse menu, VEILOR OS wordmark, hostname auto

User boot-tested v0.5.2 + in-VM patch. Requested polish:

- Banner: replace slant-figlet `veilor-os` + "hardened. branded. yours."
  tagline with figlet ANSI Regular `VEILOR OS` wordmark (5-line block).
  No tagline. Border preserved by gum style call.
- Menu header: "Welcome. What would you like to do?" → "Welcome"
- Menu labels:
    "Install veilor-os to disk"     → "Install"
    "Try live — desktop (KDE Plasma)" → "live - (KDE)"
    "Try live — shell"              → "live - shell"
    "Reboot" / "Power off"          unchanged
- Hostname prompt removed — hardcoded to "veilor". User can change
  post-install via hostnamectl. Cuts one prompt from install flow.
  Confirmation summary drops the Hostname row.
- Locale options trimmed: en_GB.UTF-8, en_US.UTF-8 only (was 4 incl
  de_DE, fr_FR). i18n not v0.5 priority.

Verified in-VM rendering of the menu changes via sed-patch on v0.5.2
ISO. ksvalidator + bash -n clean.

assets/installer/banner.txt

@@ -1,7 +1,5 @@
-                _ __
- _   _____  (_) /___  _____      ____  _____
-| | / / _ \/ / / __ \/ ___/_____/ __ \/ ___/
-| |/ /  __/ / / /_/ / /  /_____/ /_/ (__  )
-|___/\___/_/_/\____/_/         \____/____/
-
-         hardened. branded. yours.
+██    ██ ███████ ██ ██       ██████  ██████       ██████  ███████
+██    ██ ██      ██ ██      ██    ██ ██   ██     ██    ██ ██
+██    ██ █████   ██ ██      ██    ██ ██████      ██    ██ ███████
+ ██  ██  ██      ██ ██      ██    ██ ██   ██     ██    ██      ██
+  ████   ███████ ██ ███████  ██████  ██   ██      ██████  ███████

overlay/usr/local/bin/veilor-installer

@@ -180,10 +180,10 @@ prompt_error() {
 }
 
 main_menu() {
-    prompt_choose "Welcome. What would you like to do?" \
-        "Install veilor-os to disk" \
-        "Try live — desktop (KDE Plasma)" \
-        "Try live — shell" \
+    prompt_choose "Welcome" \
+        "Install" \
+        "live - (KDE)" \
+        "live - shell" \
         "Reboot" \
         "Power off"
 }
@@ -205,7 +205,8 @@ collect_answers() {
     disk=$(prompt_choose_pairs "Select install disk (will be ERASED)" "${disks_pairs[@]}") || return 1
 
     # ── Hostname ──
-    hostname=$(prompt_input "Set hostname" "veilor") || return 1
+    # Hardcoded for branded consistency. Post-install: `hostnamectl set-hostname`.
+    hostname="veilor"
 
     # Reject shell-special and sed-special chars in passwords. Generated
     # kickstart writes them via heredoc + sed substitution; bare $, ", \, `
@@ -240,15 +241,12 @@ collect_answers() {
     # ── Locale ──
     locale=$(prompt_choose "Choose locale" \
         "en_GB.UTF-8" \
-        "en_US.UTF-8" \
-        "de_DE.UTF-8" \
-        "fr_FR.UTF-8") || return 1
+        "en_US.UTF-8") || return 1
 
     # ── Confirmation ──
     prompt_confirm "About to install veilor-os:
 
   Disk:       $disk (will be ERASED)
-  Hostname:   $hostname
   Locale:     $locale
   LUKS:       set
   Admin pw:   set
@@ -572,13 +570,13 @@ banner
 
 while true; do
     case "$(main_menu)" in
-        "Install veilor-os to disk")
+        "Install")
             if collect_answers && generate_ks; then
                 run_install || continue
             fi
             ;;
-        "Try live — desktop (KDE Plasma)") launch_desktop ;;
-        "Try live — shell") drop_to_shell ;;
+        "live - (KDE)") launch_desktop ;;
+        "live - shell") drop_to_shell ;;
         "Reboot") systemctl reboot ;;
         "Power off") systemctl poweroff ;;
         *) drop_to_shell ;;