fix(kiosk): correct VT hints, UTF-8 logo, ignore accidental power-off

Three fresh-install kiosk issues found on a Framework node:
- MOTD said 'Ctrl+Alt+F7 for kiosk' / 'F1 for terminal', but the kiosk's
  Xorg runs on vt1 — so F7 was an empty black VT (the reported black screen
  and the failed 'return to kiosk'). Corrected: kiosk=F1, terminal=F2.
- The UTF-8 block-glyph logo corrupted intermittently because returning from
  the kiosk can leave the console VT out of UTF-8 mode; force it with ESC%G.
- A short power-button press shut the node down instantly. Ignore the short
  press, keep long-press poweroff, so accidental brushes don't kill the node.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

image-recipe/_archived/build-auto-installer-iso.sh

@@ -2490,6 +2490,17 @@ HandleLidSwitchExternalPower=ignore
 HandleLidSwitchDocked=ignore
 LIDCONF
 
+# Kiosk appliance: a short press or accidental brush of the power button used
+# to shut the node down instantly (confirmed on a Framework node — "Power key
+# pressed short -> Powering off"). Ignore the short press; keep a deliberate
+# long press (hold ~2s) as the intentional power-off, so the node isn't taken
+# down by accident but can still be shut down on purpose without a keyboard.
+cat > /mnt/target/etc/systemd/logind.conf.d/power-key.conf <<'PWRCONF'
+[Login]
+HandlePowerKey=ignore
+HandlePowerKeyLongPress=poweroff
+PWRCONF
+
 # Copy Archipelago binaries and files
 if [ -d "$BOOT_MEDIA/archipelago/bin" ]; then
     cp -r "$BOOT_MEDIA/archipelago/bin/"* /mnt/target/usr/local/bin/ 2>/dev/null || true
@@ -2649,6 +2660,11 @@ if [ -t 0 ] && [ -z "$ARCHIPELAGO_WELCOMED" ]; then
     W='\033[1;37m'
     N='\033[0m'
 
+    # The logo uses UTF-8 block-drawing glyphs. Switching back from the kiosk
+    # (Xorg on vt1) can leave the console VT out of UTF-8 mode, which renders
+    # them as garbage bytes ("sometimes corrupt"). ESC % G forces the VT into
+    # UTF-8 mode so the logo always draws correctly.
+    printf '\033%%G' 2>/dev/null || true
     clear
     echo -e "  ${O}▄▀█ █▀▄ █▀▀ █ █ █ █▀█ █▀▀ █   ▄▀█ █▀▀ █▀█${N}"
     echo -e "  ${O}█▀█ █▀▄ █   █▀█ █ █▀▀ ██▀ █   █▀█ █ █ █ █${N}"
@@ -2664,10 +2680,14 @@ if [ -t 0 ] && [ -z "$ARCHIPELAGO_WELCOMED" ]; then
     if [ -b /dev/mapper/archipelago-data ] || [ -b /dev/mapper/archipelago_crypt ]; then
         echo -e "  ${OD}storage   LUKS2 encrypted${N}"
     fi
+    # The kiosk's Xorg runs on vt1 (see archipelago-kiosk-launcher: "Xorg :0
+    # vt1"), so Ctrl+Alt+F1 IS the kiosk and a terminal is on another VT (F2,
+    # where systemd auto-spawns a getty). The old hints had these backwards —
+    # they sent you to an empty black VT7 and there was no way back to the kiosk.
     if systemctl is-active archipelago-kiosk.service >/dev/null 2>&1; then
-        echo -e "  ${OD}display   Kiosk active (Ctrl+Alt+F1 for terminal)${N}"
+        echo -e "  ${OD}display   Kiosk active (Ctrl+Alt+F2 for terminal)${N}"
     else
-        echo -e "  ${OD}display   Console (Ctrl+Alt+F7 for kiosk)${N}"
+        echo -e "  ${OD}display   Console (Ctrl+Alt+F1 for kiosk)${N}"
     fi
     echo ""
 fi

image-recipe/configs/archipelago-kiosk-launcher.sh

@@ -82,6 +82,24 @@ configure_display() {
 
 configure_display
 
+# --- Kiosk UI scaling for large / high-res displays -----------------------
+# REVERT: set env ARCHIPELAGO_KIOSK_SCALE=1 (per-node, no rebuild), or restore
+# the hardcoded --force-device-scale-factor=1 below to disable entirely.
+#
+# A big TV reports its full native resolution as the CSS viewport, so a 4K
+# panel becomes a 3840px-wide viewport and the UI renders tiny — and a
+# keyboard-less kiosk can't zoom. Derive Chromium's device-scale-factor from
+# the detected panel width so the *effective* CSS viewport lands near a
+# comfortable across-the-room target, scaling the whole UI up on big screens:
+#   1920x1080 -> 1.50 | 2560x1440 -> 2.00 | 3840x2160 -> 3.00 (clamped 1.0-3.0)
+KIOSK_TARGET_CSS_WIDTH=${ARCHIPELAGO_KIOSK_TARGET_CSS_WIDTH:-1280}
+if [ -n "${ARCHIPELAGO_KIOSK_SCALE:-}" ]; then
+    KIOSK_SCALE=$ARCHIPELAGO_KIOSK_SCALE
+else
+    KIOSK_SCALE=$(awk -v w="$KIOSK_MODE_W" -v t="$KIOSK_TARGET_CSS_WIDTH" \
+        'BEGIN{if(t<=0)t=1280; s=w/t; s=int(s*4+0.5)/4; if(s<1)s=1; if(s>3)s=3; printf "%.2f", s}')
+fi
+
 xhost +SI:localuser:archipelago 2>/dev/null || true
 xsetroot -solid black 2>/dev/null || true
 xset s off 2>/dev/null || true
@@ -142,7 +160,7 @@ while true; do
       --window-size=${KIOSK_MODE_W},${KIOSK_MODE_H} \
       --window-position=0,0 \
       --start-fullscreen \
-      --force-device-scale-factor=1 \
+      --force-device-scale-factor=${KIOSK_SCALE} \
       --disable-background-networking \
       --disable-background-timer-throttling \
       --disable-backgrounding-occluded-windows \