feat: i18n moonarch-update via pacman gettext + inline DE

Prompts and log lines now follow the user's LANG. Reuses pacman's
gettext catalog for strings with matching upstream msgids
(Proceed with installation?, [Y/n], Starting full system upgrade...,
Do you want to remove these packages?). Moonarch-specific strings
go through an inline _t "en" "de" helper keyed off ${LANG%%.*}.

confirm() switches to pacman-style: :: prefix, default Y, accepts
y/Y/j/J. No PKGBUILD change — gettext ships with base.

DECISIONS.md

@@ -1,5 +1,11 @@
 # Decisions
 
+## 2026-04-19 – moonup i18n: reuse pacman gettext catalog + inline fallback
+- **Who**: Dominik, ClaudeCode
+- **Why**: moonup prompts looked foreign next to pacman/paru output (`[y/N]` vs `[J/n]`, English strings on a German system). User wanted consistency with the rest of the pacman UX.
+- **Tradeoffs**: Full `.po`/`.mo` build-chain for moonarch was overkill for ~15 strings. gettext-only approach misses most moonarch-specific strings (no matching msgids in pacman catalog). Chose hybrid: `TEXTDOMAIN=pacman` for strings that match upstream msgids (prompts like `Proceed with installation?`, `Do you want to remove these packages?`, `[Y/n]`, `Starting full system upgrade...`), inline `_t()` helper for moonarch-specific strings.
+- **How**: `moonarch-update` sets `TEXTDOMAIN=pacman`/`TEXTDOMAINDIR=/usr/share/locale`. `_t "en" "de"` picks by `${LANG%%.*}` matching `de_*`. `confirm()` now uses `::` prefix, default Y, accepts `y/Y/j/J`. No PKGBUILD change — `gettext` is in `base`. pacman msgids with trailing `\n` (e.g. `Starting full system upgrade...\n`) require ANSI-C quoting `$'...\n'` to match.
+
 ## 2026-04-08 – Battery conservation mode: udev + sysfs + Waybar toggle
 - **Who**: Dominik, ClaudeCode
 - **Why**: Laptops with `charge_control_end_threshold` support benefit from limiting charge to 80% to extend battery lifespan. Needed a user-friendly toggle without requiring sudo.

scripts/moonarch-update

@@ -4,6 +4,21 @@
 
 set -euo pipefail
 
+# --- i18n ---
+# Reuse pacman's gettext catalog for prompts that match upstream msgids.
+# For moonarch-specific strings fall back to _t() inline translation.
+export TEXTDOMAIN=pacman
+export TEXTDOMAINDIR=/usr/share/locale
+YN=$(gettext "[Y/n]")
+
+_t() {
+    # _t "english" "deutsch" — picks by $LANG
+    case "${LANG%%.*}" in
+        de_*) printf '%s' "$2" ;;
+        *)    printf '%s' "$1" ;;
+    esac
+}
+
 # --- Helper functions ---
 
 log() {
@@ -19,8 +34,8 @@ read_packages() {
 }
 
 confirm() {
-    read -r -p "$1 [y/N] " response
-    [[ "$response" =~ ^[yY]$ ]]
+    read -r -p ":: $1 $YN " response
+    [[ -z "$response" || "$response" =~ ^[yYjJ]$ ]]
 }
 
 OFFICIAL_PACKAGES="/usr/share/moonarch/official.txt"
@@ -29,85 +44,85 @@ AUR_PACKAGES="/usr/share/moonarch/aur.txt"
 # --- Prerequisites ---
 
 if [[ $EUID -eq 0 ]]; then
-    err "Do NOT run as root. The script uses sudo where needed."
+    err "$(_t "Do NOT run as root. The script uses sudo where needed." "Nicht als root ausführen. Das Script verwendet sudo wo nötig.")"
     exit 1
 fi
 
 # --- 1. Update system packages ---
 
-log "=== Update system packages ==="
+log "=== $(gettext $'Starting full system upgrade...\n' | tr -d '\n.') ==="
 
-if confirm "Run pacman -Syu?"; then
+if confirm "$(_t "Run pacman -Syu?" "pacman -Syu ausführen?")"; then
     sudo pacman -Syu
 else
-    log "System update skipped."
+    log "$(_t "System update skipped." "Systemaktualisierung übersprungen.")"
 fi
 
 if command -v paru &>/dev/null; then
-    if confirm "Update AUR packages (paru -Sua)?"; then
+    if confirm "$(_t "Update AUR packages (paru -Sua)?" "AUR-Pakete aktualisieren (paru -Sua)?")"; then
         paru -Sua
     else
-        log "AUR update skipped."
+        log "$(_t "AUR update skipped." "AUR-Aktualisierung übersprungen.")"
     fi
 fi
 
 # --- 2. Reconcile package lists ---
 
-log "=== Reconcile package lists ==="
+log "=== $(_t "Reconcile package lists" "Paketlisten abgleichen") ==="
 
 if [[ -f "$OFFICIAL_PACKAGES" ]]; then
     MISSING_OFFICIAL=$(comm -23 <(read_packages "$OFFICIAL_PACKAGES" | sort) <(pacman -Qq | sort) || true)
     if [[ -n "$MISSING_OFFICIAL" ]]; then
-        log "Missing official packages:"
+        log "$(_t "Missing official packages:" "Fehlende offizielle Pakete:")"
         echo "$MISSING_OFFICIAL"
-        if confirm "Install?"; then
+        if confirm "$(gettext 'Proceed with installation?')"; then
             # shellcheck disable=SC2086
             sudo pacman -S --needed --noconfirm $MISSING_OFFICIAL
         fi
     else
-        log "All official packages installed."
+        log "$(_t "All official packages installed." "Alle offiziellen Pakete installiert.")"
     fi
 fi
 
 if [[ -f "$AUR_PACKAGES" ]] && command -v paru &>/dev/null; then
     MISSING_AUR=$(comm -23 <(read_packages "$AUR_PACKAGES" | sort) <(pacman -Qq | sort) || true)
     if [[ -n "$MISSING_AUR" ]]; then
-        log "Missing AUR packages:"
+        log "$(_t "Missing AUR packages:" "Fehlende AUR-Pakete:")"
         echo "$MISSING_AUR"
-        if confirm "Install?"; then
+        if confirm "$(gettext 'Proceed with installation?')"; then
             # shellcheck disable=SC2086
             paru -S --needed --noconfirm $MISSING_AUR
         fi
     else
-        log "All AUR packages installed."
+        log "$(_t "All AUR packages installed." "Alle AUR-Pakete installiert.")"
     fi
 fi
 
 # --- 3. Orphaned packages ---
 
-log "=== Orphaned packages ==="
+log "=== $(_t "Orphaned packages" "Verwaiste Pakete") ==="
 
 ORPHANS=$(pacman -Qdtq 2>/dev/null || true)
 if [[ -n "$ORPHANS" ]]; then
-    log "Orphaned packages found:"
+    log "$(_t "Orphaned packages found:" "Verwaiste Pakete gefunden:")"
     echo "$ORPHANS"
-    if confirm "Remove?"; then
+    if confirm "$(gettext 'Do you want to remove these packages?')"; then
         # shellcheck disable=SC2086
         sudo pacman -Rsn --noconfirm $ORPHANS
     fi
 else
-    log "No orphaned packages."
+    log "$(_t "No orphaned packages." "Keine verwaisten Pakete.")"
 fi
 
 # --- Done ---
 
 log ""
 log "============================================"
-log "  Moonarch update complete!"
+log "  $(_t "Moonarch update complete!" "Moonarch-Aktualisierung abgeschlossen!")"
 log "============================================"
 
 # Keep terminal open when launched from a GUI (e.g. Waybar on-click)
 if [[ -t 0 ]]; then
     echo
-    read -n 1 -s -r -p "Press any key to close..."
+    read -n 1 -s -r -p "$(_t "Press any key to close..." "Beliebige Taste drücken zum Schließen …")"
 fi