Merge pull request #112 from outis1one/claude/kiosk-web-management-5rl5zr

Claude/kiosk web management 5rl5zr
2026-08-20 11:41:41 -04:00
parent 1fad3393ac e607e8cea0
commit ff67e422a4
23 changed files with 3830 additions and 19 deletions
@@ -0,0 +1,2 @@
+node_modules/
+webui/test/fixtures/.fake-state/
@@ -1,6 +1,6 @@
 # Ubuntu Based Kiosk

-**Current Version:** 2.13.0 (check script header for latest version)
+**Current Version:** 2.17.0 (check script header for latest version)
 **Built with Claude Sonnet 4.6 AI assistance**
 **License:** GPL v3 - Keep derivatives open source
 **Repository:** https://github.com/outis1one/ubuntu-based-kiosk/
@@ -1291,6 +1291,17 @@ terminal menu and the web UI, so they can't drift apart).
  steps, so any code or hardware-config change picked up by the pull
  actually takes effect. Also offers an on-demand Electron version
  check. See "Recent Updates (v2.15.0)" below.
+- `webui/` + `menus/addon_webui.sh` — **Web UI** (Addons, installed by
+  default during provisioning): a small Node/Express app running as a
+  systemd service under `$KIOSK_USER` with zero ambient `sudo`, giving
+  a browser-based editor for Sites & Page Timing, Display & Interaction,
+  and Password Protection & Lockout, plus install/reconfigure for CUPS,
+  LMS/Squeezelite, and Asterisk Intercom, and Update — each reached
+  through a narrow, allow-listed root helper
+  (`webui_write_helper_script`) rather than any ambient privilege on
+  the service itself. No login of its own, put it behind your own
+  reverse proxy with Authelia forward-auth if it needs to be reachable
+  beyond a trusted LAN. See "Recent Updates (v2.17.0)" below.
 - `install.sh` — entry point for the modular tool, now grouped **Core
  Settings / Addons / Advanced** like the legacy menu. On a machine
  with no kiosk installed yet, it provisions one first (see
@@ -1346,9 +1357,26 @@ full migration pass.

 ## Project Status & Future Plans

-**Current Version:** 2.15.0
+**Current Version:** 2.17.0

-**Recent Updates (v2.15.0):**
+**Recent Updates (v2.17.0):**
+- **Web UI now installs by default** during first-time provisioning (fixed port 8090, no prompt) instead of being opt-in — the Addons menu entry still works standalone for reconfiguring the port or reinstalling it on a kiosk provisioned before this change.
+- **The web UI can now install/reconfigure CUPS Printing, LMS Server, Squeezelite Player, and Asterisk Intercom, and check for updates** — the same four addons plus Update named directly. Every one of these is the exact same interactive `action_*` function the terminal menu already uses (no prompt/mutation refactor of any addon file), driven by piping the right answers on stdin — the same technique this project's own bash tests already use to drive these functions.
+- **Privilege model:** the web service itself still runs as `$KIOSK_USER` with zero ambient `sudo`. A new narrow, allow-listed root helper is the only way it ever gains privilege — reachable only via a single-path passwordless sudo rule (generated and validated with `visudo -c -f` before being installed), and it re-checks its own fixed action allow-list before dispatching anything. Chosen over running the whole service as root after asking directly: since this repo has no login of its own by design, a request that reaches the web UI with no reverse proxy in front is effectively unauthenticated, so the allow-list bounds what that can actually do to five vetted actions, never a root shell.
+- Long-running installs stream live output to the browser via Server-Sent Events, one action at a time — a second request while one is in flight gets a clear `409`, never silently queued or dropped.
+- **Full visual redesign:** a sidebar shell (Sites/Display/Lockout/Addons/Update) replacing the single scrolling page of three cards, both light and dark themes via `prefers-color-scheme`, no external font/CDN dependency.
+- A real bug was found and fixed by actually driving the redesigned UI in a headless browser, not just by reading the code: refreshing an addon's pill/button after a successful install used to rebuild the whole card, which raced (and usually lost to) the success status/log that same job had just written a moment earlier. Fixed to update the pill/buttons in place, leaving the completed job's log exactly as the user left it.
+- Uninstall-via-web is deliberately still not offered, for any addon — flagged as needing its own double-confirmation design, not bundled into this pass. WiFi, Timezone, Power/Display/Quiet Hours, Diagnostics, Remote Access, Authelia, Factory Reset, Virtual Consoles, Emergency Hotspot, Clone Settings, and the fleet/multi-kiosk dashboard all remain out of scope for the web UI too — each a named, sequenced follow-up, not an oversight.
+
+**Previous (v2.16.0):**
+- **New: Web UI** (Addons → Web UI) — a small Node/Express app (`webui/`) giving a browser-based editor for Sites & Page Timing, Display & Interaction, and Password Protection & Lockout, the three Core Settings menus that are pure `config.json` read/write with no privileged system mutation involved. Runs as a systemd service under `$KIOSK_USER` (the same user Electron runs as), so it never needs `sudo` — it reads/writes `config.json` with normal filesystem permissions.
+- `webui/lib/config.js` re-implements `lib/config.sh`'s exact field list, defaults, and merge-on-save contract in JS — `kiosk-app/main.js` already reads the same `config.json` directly in JS, so this isn't a new pattern — meaning it can never silently clobber fields it doesn't track (Authelia's credentials, the unused quiet-hours fields, etc), the same failure mode previously fixed in `lib/config.sh`'s own history.
+- **No login of its own, by design.** Authelia runs elsewhere; the expectation is a reverse proxy (e.g. Caddy) with Authelia forward-auth in front of it, the same way other self-hosted apps get protected — Authelia integration is explicitly out of scope for this repo. Direct LAN access with no proxy in front has no authentication at all — treat it like SSH access to the kiosk.
+- Deliberately narrow scope for this first pass: WiFi, Timezone, Power/Display/Quiet Hours, Complete Uninstall, every other addon, and everything in Advanced remain terminal-only — a network-facing process shouldn't be handed `sudo`-level system mutation (netplan, `timedatectl`, `apt`, systemd timers) without a lot more thought than this pass gives it. A "restart kiosk display" action was left out for the same reason — would need a narrow polkit grant, a follow-up.
+- Wired into Complete Uninstall (`webui_do_uninstall`) and Clone Settings (addon-presence detection) the same way every other addon is.
+- This is the single-kiosk piece of the web-based GUI mentioned in this doc's "Modular Management" notes for a while — a central multi-kiosk fleet dashboard is an intentional follow-up, not part of this pass.
+
+**Previous (v2.15.0):**
 - **New: Upgrade** (Advanced → Upgrade) — not a port of the legacy Upgrade, which re-extracted `main.js`/`preload.js`/etc from its own heredocs on every run. `kiosk-app/` and `provision/files/` are real files in this git checkout now, so the modular Upgrade is `git pull` (after confirming a clean working tree, and only as a fast-forward — never an automatic merge) followed by re-running the same packages/kiosk-app/display/firewall/power-management steps `lib/provision.sh` already has for a fresh install, reused rather than reimplemented. Skips the interactive first-run settings wizard and the "reboot now" prompt.
 - Also offers an on-demand Electron version check regardless of whether there was code to pull (Electron isn't versioned by this repo) — reuses the existing, already-tested `action_update_electron` as-is.
 - Requires a real git checkout (not the no-git ZIP download option) and a clean working tree; a diverged local history fails the pull cleanly with a clear message rather than attempting an automatic merge.
@@ -32,7 +32,12 @@
 #     (menus/addon_authelia.sh), Remote Access - VNC/WireGuard/
 #     Tailscale/Netbird (menus/addon_remote_access.sh), LMS Server /
 #     Squeezelite Player (menus/addon_lms_squeezelite.sh), Asterisk
-#     Intercom - SIP extension client (menus/addon_asterisk_intercom.sh).
+#     Intercom - SIP extension client (menus/addon_asterisk_intercom.sh),
+#     Web UI (menus/addon_webui.sh - browser-based editor for Sites/
+#     Display/Lockout, the webui/ Node app installed as a systemd
+#     service; no login of its own, put it behind your own reverse proxy
+#     with Authelia forward-auth if it needs to be reachable beyond a
+#     trusted LAN - see the file header).
 #   Advanced: Diagnostics (menus/diagnostics.sh - system status/logs/
 #     audio/network), Electron Maintenance (menus/advanced_electron.sh -
 #     manual update, fix blank screen), Factory Reset
@@ -87,6 +92,8 @@ source "$SCRIPT_DIR/menus/addon_remote_access.sh"
 source "$SCRIPT_DIR/menus/addon_lms_squeezelite.sh"
 # shellcheck source=menus/addon_asterisk_intercom.sh
 source "$SCRIPT_DIR/menus/addon_asterisk_intercom.sh"
+# shellcheck source=menus/addon_webui.sh
+source "$SCRIPT_DIR/menus/addon_webui.sh"
 # shellcheck source=menus/advanced_electron.sh
 source "$SCRIPT_DIR/menus/advanced_electron.sh"
 # shellcheck source=menus/advanced_upgrade.sh
@@ -167,8 +174,8 @@ core_settings_menu() {
 }

 addons_menu_builder() {
-    MENU_LABELS=("CUPS Printing" "Authelia Auto-Login" "Remote Access" "LMS Server / Squeezelite Player" "Asterisk Intercom (SIP Extension)")
-    MENU_HANDLERS=(addon_cups_menu addon_authelia_menu remote_access_menu addon_lms_squeezelite_menu addon_asterisk_intercom_menu)
+    MENU_LABELS=("CUPS Printing" "Authelia Auto-Login" "Remote Access" "LMS Server / Squeezelite Player" "Asterisk Intercom (SIP Extension)" "Web UI")
+    MENU_HANDLERS=(addon_cups_menu addon_authelia_menu remote_access_menu addon_lms_squeezelite_menu addon_asterisk_intercom_menu addon_webui_menu)
 }

 addons_menu() {
@@ -31,6 +31,15 @@
 : "${NETPLAN_DIR:=/etc/netplan}"
 : "${POLKIT_DIR:=/etc/polkit-1/localauthority/50-local.d}"
 : "${WIREGUARD_DIR:=/etc/wireguard}"
+: "${WEBUI_DIR:=/opt/kiosk-webui}"
+: "${WEBUI_ENV_DIR:=/etc/kiosk-webui}"
+: "${SUDOERS_D_DIR:=/etc/sudoers.d}"
+# The one root-owned script the Web UI's addon-install/Update actions are
+# allowed to invoke via passwordless sudo (menus/addon_webui.sh writes it
+# and the matching /etc/sudoers.d/kiosk-webui rule - see that file's
+# header). Under $BIN_DIR since that's already the convention for every
+# other addon's own scripts.
+: "${WEBUI_HELPER_PATH:=$BIN_DIR/kiosk-webui-helper}"

 # The admin account actually running this tool (as opposed to $KIOSK_USER,
 # the kiosk's own restricted account) - used where an addon needs to grant
@@ -38,7 +38,8 @@
 # which is more risk than this pass should take on.
 #
 # Depends on: lib/menu.sh, lib/config.sh, lib/electron.sh being sourced
-# first, and every menus/*.sh this calls into for configuration.
+# first, and every menus/*.sh this calls into for configuration
+# (including menus/addon_webui.sh, for provision_configure_webui below).
 ################################################################################

 PROVISION_FILES="$SCRIPT_DIR/provision/files"
@@ -54,7 +55,7 @@ provision_install_file() {
 }

 provision_install_packages() {
-    echo "[1/9] Installing packages..."
+    echo "[1/10] Installing packages..."
    sudo apt update
    sudo apt install -y \
      xorg openbox lightdm unclutter screen curl git build-essential \
@@ -79,7 +80,7 @@ provision_install_packages() {
 }

 provision_create_kiosk_user() {
-    echo "[2/9] Creating kiosk user..."
+    echo "[2/10] Creating kiosk user..."
    if ! id "$KIOSK_USER" &>/dev/null; then
        sudo useradd -m -s /bin/bash -G audio,video,input,plugdev,netdev "$KIOSK_USER"
        echo "$KIOSK_USER:kiosk" | sudo chpasswd
@@ -98,7 +99,7 @@ provision_create_kiosk_user() {
 }

 provision_install_nodejs() {
-    echo "[3/9] Installing Node.js..."
+    echo "[3/10] Installing Node.js..."
    if ! command -v node &>/dev/null; then
        curl -fsSL https://deb.nodesource.com/setup_22.x | sudo -E bash -
        sudo apt install -y nodejs
@@ -107,7 +108,7 @@ provision_install_nodejs() {
 }

 provision_install_app() {
-    echo "[4/9] Installing kiosk app..."
+    echo "[4/10] Installing kiosk app..."
    sudo cp "$KIOSK_APP_SRC"/*.js "$KIOSK_APP_SRC"/*.html "$KIOSK_APP_SRC/package.json" "$KIOSK_APP_SRC/start.sh" "$KIOSK_DIR/"
    sudo chown "$KIOSK_USER:$KIOSK_USER" "$KIOSK_DIR"/*.js "$KIOSK_DIR"/*.html "$KIOSK_DIR/package.json" "$KIOSK_DIR/start.sh"
    sudo chmod +x "$KIOSK_DIR/start.sh"
@@ -150,7 +151,7 @@ EOF
 }

 provision_configure_display() {
-    echo "[5/9] Configuring display (LightDM/Openbox/touch/video)..."
+    echo "[5/10] Configuring display (LightDM/Openbox/touch/video)..."

    sudo -u "$KIOSK_USER" mkdir -p "$KIOSK_HOME/.config/openbox" "$KIOSK_HOME/.config/pulse"
    sudo mkdir -p /etc/X11/xorg.conf.d
@@ -183,7 +184,7 @@ provision_configure_display() {
 }

 provision_configure_firewall() {
-    echo "[6/9] Configuring firewall..."
+    echo "[6/10] Configuring firewall..."
    sudo ufw --force enable
    sudo ufw default deny incoming
    sudo ufw default allow outgoing
@@ -192,7 +193,7 @@ provision_configure_firewall() {
 }

 provision_configure_power_management() {
-    echo "[7/9] Configuring power management..."
+    echo "[7/10] Configuring power management..."
    sudo mkdir -p /etc/polkit-1/localauthority/50-local.d
    provision_install_file "etc/polkit-1/localauthority/50-local.d/kiosk-power.pkla" /etc/polkit-1/localauthority/50-local.d/kiosk-power.pkla

@@ -226,11 +227,43 @@ provision_configure_power_management() {
    fi
 }

+# Installed by default now, not opt-in - reuses menus/addon_webui.sh's
+# own install helpers directly rather than duplicating them, with a
+# fixed default port and no prompt (first-time install already has
+# plenty). See that file's header for the privilege model (a narrow
+# allow-listed root helper, not the service itself running as root) and
+# why this exists at all: browser-based config editing, and - via that
+# helper - install/reconfigure for CUPS/LMS/Squeezelite/Asterisk
+# Intercom and Update, none of which are reimplemented here.
+provision_configure_webui() {
+    echo "[8/10] Installing Web UI..."
+    if ! webui_install_app_files; then
+        log_warning "Web UI install failed - configure later: Addons -> Web UI"
+        return 0
+    fi
+
+    local port="8090"
+    webui_write_env_file "$port"
+    webui_write_unit_file
+    webui_write_helper_script
+    if ! webui_write_sudoers_file; then
+        log_warning "Web UI installed but its addon-install/Update helper could not be granted permission - configure later: Addons -> Web UI"
+        return 0
+    fi
+
+    if enable_and_start_units kiosk-webui; then
+        sudo ufw allow "${port}/tcp" comment 'Kiosk Web UI' 2>/dev/null || true
+        log_success "Web UI installed: http://$(get_ip_address):${port}"
+    else
+        log_warning "Web UI installed but failed to start - check: sudo journalctl -u kiosk-webui -n 50"
+    fi
+}
+
 # Configuration from here on is NOT reimplemented - it's the exact same
 # Core Settings / Advanced menus this tool already uses to manage a
 # kiosk after install, called directly instead of duplicated.
 provision_configure_kiosk_settings() {
-    echo "[8/9] Configuring kiosk settings..."
+    echo "[9/10] Configuring kiosk settings..."
    echo "Core Settings is next - sites, timezone, touch/navigation,"
    echo "password protection, WiFi, and schedules. Skip and configure"
    echo "later via ./install.sh if you'd rather do this after reboot."
@@ -256,7 +289,7 @@ provision_configure_kiosk_settings() {
 }

 provision_finish() {
-    echo "[9/9] Done."
+    echo "[10/10] Done."
    echo
    log_success "Core installation complete!"
    echo
@@ -289,6 +322,9 @@ run_first_time_install() {
    echo "  - Hardware video acceleration"
    echo "  - Audio support (PipeWire)"
    echo "  - Time synchronization (NTP)"
+    echo "  - Web UI (browser-based Sites/Display/Lockout editor, plus"
+    echo "    addon install/reconfigure and Update - no login of its own,"
+    echo "    see Addons -> Web UI)"
    echo
    echo "OPTIONAL (configure after install, via Addons):"
    echo "  - Lyrion Music Server (LMS) / Squeezelite"
@@ -317,6 +353,7 @@ run_first_time_install() {
    provision_configure_display
    provision_configure_firewall
    provision_configure_power_management
+    provision_configure_webui
    provision_configure_kiosk_settings
    provision_finish
    return 0
@@ -0,0 +1,353 @@
+#!/bin/bash
+################################################################################
+# menus/addon_webui.sh - "Web UI" addon: installs webui/ (a small Node/
+# Express app) as a systemd service running as $KIOSK_USER, giving a
+# browser-based editor for Sites & Page Timing, Display & Interaction,
+# and Password Protection & Lockout - config.json read/write only, no
+# sudo needed, since that file is already owned by $KIOSK_USER.
+#
+# Installed by default during first-time provisioning now
+# (lib/provision.sh's provision_configure_webui, which calls the same
+# install helpers this file defines) - this menu remains here for
+# reconfiguring the port, restarting the service, or reinstalling it on
+# a kiosk provisioned before this change.
+#
+# Also lets the web UI trigger a fixed, vetted set of privileged actions
+# - install/reconfigure CUPS/LMS/Squeezelite/Asterisk Intercom, and
+# Update - through a narrow, allow-listed root helper
+# (webui_write_helper_script below), rather than by giving the service
+# itself any elevated privilege. The helper is reachable only via a
+# single-path passwordless sudo rule (webui_write_sudoers_file) and
+# re-checks its own fixed action allow-list before dispatching anything,
+# even though the sudoers rule alone already restricts which script can
+# run - defense in depth. Each allow-listed action is the exact same
+# interactive `action_*` function the terminal menu already uses,
+# driven by piping the right answers on stdin, the same technique this
+# project's own bash tests already use (see webui/lib/actions.js and
+# webui/test/*.test.js). No prompt/mutation refactor of any addon file
+# was needed for this to work. Everything else (WiFi, Timezone, Power/
+# Display/Quiet Hours, Complete Uninstall, Remote Access, Authelia,
+# Factory Reset, Virtual Consoles, Emergency Hotspot, Clone Settings)
+# stays terminal-only for now.
+#
+# No login of its own, by design: this addon assumes it'll be put behind
+# a reverse proxy (e.g. Caddy) with Authelia forward-auth in front, the
+# same way other self-hosted apps get protected - Authelia integration
+# is explicitly out of scope for this repo (Authelia runs elsewhere).
+# Direct LAN access with no proxy in front has no authentication at all -
+# treat it the same as SSH access to this kiosk, which is also the
+# access level the privileged helper effectively grants if reached
+# without a proxy in front: bounded to its fixed action list, not a
+# root shell, but real system mutation all the same.
+#
+# webui/'s own app-level logic (config.json schema/merge, API
+# validation, the action allow-list/stdin synthesis, the job/SSE
+# system) lives and is tested entirely under webui/ - this file only
+# wires it up as a system service plus the privileged helper, and never
+# touches config.json itself.
+#
+# Depends on: lib/menu.sh, lib/config.sh being sourced first.
+################################################################################
+
+webui_is_installed() {
+    [[ -f "$SYSTEMD_DIR/kiosk-webui.service" ]]
+}
+
+webui_is_active() {
+    systemctl is-active --quiet kiosk-webui
+}
+
+webui_port() {
+    if sudo test -f "$WEBUI_ENV_DIR/webui.env" 2>/dev/null; then
+        sudo grep -oP '^PORT=\K.*' "$WEBUI_ENV_DIR/webui.env" 2>/dev/null || echo "8090"
+    else
+        echo "8090"
+    fi
+}
+
+addon_webui_status() {
+    if webui_is_installed && webui_is_active; then
+        echo "Web UI: running at http://$(get_ip_address):$(webui_port)"
+    elif webui_is_installed; then
+        echo "Web UI: installed but not running"
+    else
+        echo "Web UI: not installed"
+    fi
+}
+
+addon_webui_menu_builder() {
+    if webui_is_installed; then
+        MENU_LABELS=("Change port" "Restart service" "Uninstall")
+        MENU_HANDLERS=(action_webui_reconfigure action_webui_restart action_webui_uninstall)
+    else
+        MENU_LABELS=("Install Web UI")
+        MENU_HANDLERS=(action_webui_install)
+    fi
+}
+
+addon_webui_menu() {
+    run_menu "WEB UI" addon_webui_menu_builder addon_webui_status
+}
+
+################################################################################
+# Shared install helpers
+################################################################################
+
+# Copies webui/ from this checkout onto the kiosk and installs its npm
+# dependencies as $KIOSK_USER - same shape as provision_install_app in
+# lib/provision.sh, but addon-scoped (opt-in) rather than core. Every
+# critical step is individually guarded (matches menus/addon_cups.sh's
+# action_install_cups) rather than relying on set -e to stop a bare
+# sequence - menu actions are always invoked via run_menu's
+# `"${MENU_HANDLERS[...]}" "$choice" || true` dispatch, which already
+# exempts everything they do from set -e for the whole call, so a bare
+# unguarded sequence here would silently continue past a real failure
+# (e.g. attempting npm install into a directory `cp` never populated).
+webui_install_app_files() {
+    if ! sudo mkdir -p "$WEBUI_DIR"; then
+        log_error "Could not create $WEBUI_DIR"
+        return 1
+    fi
+    if ! sudo cp -r "$SCRIPT_DIR/webui/." "$WEBUI_DIR/"; then
+        log_error "Could not copy Web UI app files"
+        return 1
+    fi
+    sudo chown -R "$KIOSK_USER:$KIOSK_USER" "$WEBUI_DIR"
+    if ! sudo -u "$KIOSK_USER" bash -lc "cd '$WEBUI_DIR' && npm install --omit=dev --unsafe-perm"; then
+        log_error "npm install failed"
+        return 1
+    fi
+}
+
+webui_write_env_file() {
+    local port="$1"
+    sudo mkdir -p "$WEBUI_ENV_DIR"
+    sudo tee "$WEBUI_ENV_DIR/webui.env" > /dev/null <<EOF
+PORT=${port}
+BIND_ADDR=0.0.0.0
+CONFIG_PATH=${CONFIG_PATH}
+HELPER_PATH=${WEBUI_HELPER_PATH}
+EOF
+}
+
+# Writes the one root-owned script the Web UI is ever allowed to reach
+# via sudo (see the sudoers rule webui_write_sudoers_file writes right
+# after this). Sources the exact same files install.sh does - full path
+# list baked in at generation time from $SCRIPT_DIR, so the generated
+# script has no runtime dependency on where it happens to be invoked
+# from. The fixed ALLOWED_ACTIONS allow-list inside the script itself is
+# the real gate (checked in addition to, not instead of, the sudoers
+# rule only permitting this one script path) - a request that reaches
+# this script can only ever trigger one of these exact, already-tested
+# interactive `action_*` functions, driven the same way this project's
+# own bash tests already drive them: real answers piped in on stdin, in
+# the exact order the function's own prompts expect them. No prompt/
+# mutation refactor of any addon file needed for this to work.
+webui_write_helper_script() {
+    sudo mkdir -p "$(dirname "$WEBUI_HELPER_PATH")"
+    sudo tee "$WEBUI_HELPER_PATH" > /dev/null <<EOF
+#!/bin/bash
+set -euo pipefail
+
+# lib/provision.sh reads \$SCRIPT_DIR directly at source time (no
+# fallback default, unlike the lib/config.sh path vars) - must be a real
+# exported variable here, not just used to interpolate the source paths
+# below, or it's unbound under set -u.
+export SCRIPT_DIR="$SCRIPT_DIR"
+
+source "$SCRIPT_DIR/lib/menu.sh"
+source "$SCRIPT_DIR/lib/config.sh"
+source "$SCRIPT_DIR/lib/electron.sh"
+source "$SCRIPT_DIR/menus/sites.sh"
+source "$SCRIPT_DIR/menus/display.sh"
+source "$SCRIPT_DIR/menus/timezone.sh"
+source "$SCRIPT_DIR/menus/hidden_pin.sh"
+source "$SCRIPT_DIR/menus/lockout.sh"
+source "$SCRIPT_DIR/menus/wifi.sh"
+source "$SCRIPT_DIR/menus/power_schedule.sh"
+source "$SCRIPT_DIR/menus/diagnostics.sh"
+source "$SCRIPT_DIR/menus/addon_cups.sh"
+source "$SCRIPT_DIR/menus/addon_authelia.sh"
+source "$SCRIPT_DIR/menus/addon_remote_access.sh"
+source "$SCRIPT_DIR/menus/addon_lms_squeezelite.sh"
+source "$SCRIPT_DIR/menus/addon_asterisk_intercom.sh"
+source "$SCRIPT_DIR/menus/addon_webui.sh"
+source "$SCRIPT_DIR/menus/advanced_electron.sh"
+source "$SCRIPT_DIR/menus/advanced_upgrade.sh"
+source "$SCRIPT_DIR/menus/advanced_factory_reset.sh"
+source "$SCRIPT_DIR/menus/advanced_virtual_consoles.sh"
+source "$SCRIPT_DIR/menus/advanced_emergency_hotspot.sh"
+source "$SCRIPT_DIR/menus/complete_uninstall.sh"
+source "$SCRIPT_DIR/menus/clone_settings.sh"
+source "$SCRIPT_DIR/lib/provision.sh"
+
+# Read-only status wrappers, not addon logic of their own - just a
+# single fixed-shape JSON line so the web UI can show "Install" vs.
+# "Reconfigure" per addon in one round trip. None of the underlying
+# checks (dpkg query, systemctl is-active/is-enabled, a file-existence
+# test under \$KIOSK_HOME) need root, but this script is still only
+# reachable via the same sudo-gated path as everything else here - one
+# access path is simpler to reason about than two, and the extra sudo
+# call for a read-only check is negligible.
+status_all() {
+    echo "{\"cups\":\$(cups_is_installed && echo true || echo false),\"lms\":\$(lms_is_installed && echo true || echo false),\"squeezelite\":\$(squeezelite_is_installed && echo true || echo false),\"asterisk_intercom\":\$(baresip_is_installed && echo true || echo false)}"
+}
+
+ALLOWED_ACTIONS=(
+    action_install_cups
+    action_reconfigure_cups
+    action_install_lms
+    action_install_squeezelite
+    action_configure_asterisk_intercom
+    action_upgrade
+    status_all
+)
+
+action="\${1:-}"
+allowed=false
+for a in "\${ALLOWED_ACTIONS[@]}"; do
+    [[ "\$a" == "\$action" ]] && allowed=true && break
+done
+
+if ! \$allowed; then
+    echo "kiosk-webui-helper: action not permitted: \$action" >&2
+    exit 1
+fi
+
+"\$action"
+EOF
+    sudo chown root:root "$WEBUI_HELPER_PATH"
+    sudo chmod 750 "$WEBUI_HELPER_PATH"
+}
+
+# Grants $KIOSK_USER passwordless sudo on exactly this one script path -
+# no argument wildcarding at the sudoers level, since the script's own
+# ALLOWED_ACTIONS check above is the real gate. Validated with
+# `visudo -c -f` on a temp file before it's moved into place: a
+# malformed sudoers snippet can break sudo system-wide, so this step is
+# never skipped.
+webui_write_sudoers_file() {
+    local tmp
+    tmp=$(mktemp)
+    echo "${KIOSK_USER} ALL=(root) NOPASSWD: ${WEBUI_HELPER_PATH}" > "$tmp"
+
+    if ! sudo visudo -c -f "$tmp" &>/dev/null; then
+        log_error "Generated sudoers rule failed validation - not installed"
+        rm -f "$tmp"
+        return 1
+    fi
+
+    sudo mkdir -p "$SUDOERS_D_DIR"
+    sudo install -m 0440 -o root -g root "$tmp" "$SUDOERS_D_DIR/kiosk-webui"
+    rm -f "$tmp"
+}
+
+webui_write_unit_file() {
+    sudo tee "$SYSTEMD_DIR/kiosk-webui.service" > /dev/null <<EOF
+[Unit]
+Description=Kiosk Web UI
+After=network.target
+
+[Service]
+Type=simple
+User=${KIOSK_USER}
+WorkingDirectory=${WEBUI_DIR}
+EnvironmentFile=${WEBUI_ENV_DIR}/webui.env
+ExecStart=/usr/bin/node ${WEBUI_DIR}/server.js
+Restart=on-failure
+RestartSec=5
+
+[Install]
+WantedBy=multi-user.target
+EOF
+}
+
+################################################################################
+# Actions
+################################################################################
+
+action_webui_install() {
+    echo
+    echo "This installs a small web app for editing Sites & Page Timing,"
+    echo "Display & Interaction, and Password Protection & Lockout from a"
+    echo "browser - plus installing/reconfiguring CUPS, LMS/Squeezelite,"
+    echo "and Asterisk Intercom, and checking for updates. It has no login"
+    echo "of its own - put it behind your own reverse proxy (e.g. Caddy +"
+    echo "Authelia) if it needs to be reachable beyond a trusted LAN."
+    echo
+    ask_yes_no "Install the Web UI?" "n" || { echo "Cancelled"; return; }
+
+    local port
+    port=$(ask_integer "Port to listen on" "8090" 1024 65535)
+
+    echo "Installing app files and npm dependencies..."
+    if ! webui_install_app_files; then
+        log_error "Web UI install failed"
+        return 1
+    fi
+
+    webui_write_env_file "$port"
+    webui_write_unit_file
+    webui_write_helper_script
+    if ! webui_write_sudoers_file; then
+        log_error "Web UI install failed - could not grant the addon-install/Update helper permission"
+        return 1
+    fi
+
+    if enable_and_start_units kiosk-webui; then
+        sudo ufw allow "${port}/tcp" comment 'Kiosk Web UI' 2>/dev/null || true
+        log_success "Web UI installed: http://$(get_ip_address):${port}"
+    else
+        log_error "Web UI installed but failed to start - check: sudo journalctl -u kiosk-webui -n 50"
+        return 1
+    fi
+}
+
+action_webui_reconfigure() {
+    echo
+    local current_port
+    current_port=$(webui_port)
+    local port
+    port=$(ask_integer "Port to listen on" "$current_port" 1024 65535)
+
+    if [[ "$port" == "$current_port" ]]; then
+        echo "No change"
+        return
+    fi
+
+    webui_write_env_file "$port"
+    sudo systemctl restart kiosk-webui
+    sudo ufw allow "${port}/tcp" comment 'Kiosk Web UI' 2>/dev/null || true
+    log_success "Web UI now listening on port ${port}"
+}
+
+action_webui_restart() {
+    sudo systemctl restart kiosk-webui
+    sleep 1
+    if webui_is_active; then
+        log_success "Web UI restarted"
+    else
+        log_error "Web UI failed to restart - check: sudo journalctl -u kiosk-webui -n 50"
+        return 1
+    fi
+}
+
+action_webui_uninstall() {
+    echo
+    ask_yes_no "Uninstall the Web UI?" "n" || { echo "Cancelled"; return; }
+    webui_do_uninstall
+}
+
+# The actual removal, no prompt - shared with Complete Uninstall so that
+# operation doesn't need to re-implement Web UI teardown a second time.
+# No `ufw delete` - matches every other addon's uninstall in this
+# codebase, which never removes its own firewall rule either.
+webui_do_uninstall() {
+    sudo systemctl stop kiosk-webui 2>/dev/null || true
+    sudo systemctl disable kiosk-webui 2>/dev/null || true
+    sudo rm -f "$SYSTEMD_DIR/kiosk-webui.service"
+    sudo systemctl daemon-reload 2>/dev/null || true
+    sudo rm -f "$SUDOERS_D_DIR/kiosk-webui" "$WEBUI_HELPER_PATH"
+    sudo rm -rf "$WEBUI_DIR" "$WEBUI_ENV_DIR"
+    log_success "Web UI removed"
+}
@@ -64,6 +64,7 @@ clone_detect_addons() {
    command -v tailscale &>/dev/null && addons+=("tailscale")
    command -v netbird &>/dev/null && addons+=("netbird")
    baresip_is_installed 2>/dev/null && addons+=("asterisk_intercom")
+    webui_is_installed 2>/dev/null && addons+=("webui")

    if sudo -u "$KIOSK_USER" test -f "$CONFIG_PATH" 2>/dev/null; then
        local authelia_url
@@ -7,7 +7,8 @@
 # (cups_do_uninstall, vnc_do_uninstall, wireguard_do_uninstall,
 # tailscale_do_uninstall, netbird_do_uninstall, lms_do_uninstall,
 # squeezelite_do_uninstall, asterisk_intercom_do_uninstall,
-# power_schedule_do_remove_all, emergency_hotspot_do_disable) instead of
+# webui_do_uninstall, power_schedule_do_remove_all,
+# emergency_hotspot_do_disable) instead of
 # re-implementing removal logic for each addon a second time here - if an
 # addon's uninstall logic changes, this picks it up automatically. Only
 # the pieces no single addon owns - the kiosk user/files, Node.js/
@@ -57,6 +58,7 @@ action_complete_uninstall() {
    echo "  • Squeezelite and LMS (Lyrion Music Server)"
    echo "  • Remote access (VNC, WireGuard, Tailscale, Netbird)"
    echo "  • Asterisk Intercom (Baresip)"
+    echo "  • Web UI"
    echo "  • LightDM and Openbox"
    echo "  • All kiosk schedules and services"
    echo "  • Emergency hotspot configuration"
@@ -86,6 +88,7 @@ action_complete_uninstall() {
    lms_do_uninstall purge
    squeezelite_do_uninstall
    asterisk_intercom_do_uninstall purge
+    webui_do_uninstall

    echo "[3/12] Removing schedules and emergency hotspot..."
    power_schedule_do_remove_all
@@ -1,8 +1,95 @@
 #!/bin/bash
 ################################################################################
-###   Ubuntu Based Kiosk v2.15.0               ###
+###   Ubuntu Based Kiosk v2.17.0               ###
 ################################################################################
 #
+# RELEASE v2.17.0 - Web UI Now Installs by Default and Can Install/
+#                    Reconfigure Addons + Check for Updates
+# - Web UI (Addons -> Web UI) now installs by default during first-time
+#   provisioning (lib/provision.sh's provision_configure_webui), not
+#   opt-in - fixed port 8090, no prompt (matches every other core step).
+#   The Addons menu entry still works standalone for reconfiguring the
+#   port or reinstalling it on a kiosk provisioned before this change.
+# - The web UI can now install/reconfigure CUPS Printing, LMS Server,
+#   Squeezelite Player, and Asterisk Intercom, and check for updates -
+#   the same four addons plus Update this project's user asked for by
+#   name. Every one of these is the exact same interactive action_*
+#   function the terminal menu already uses (action_install_cups,
+#   action_install_lms, action_install_squeezelite,
+#   action_configure_asterisk_intercom, action_upgrade) - no
+#   prompt/mutation refactor of any addon file, driven instead by
+#   piping the right answers on stdin, the same technique this
+#   project's own bash tests already use to drive these functions.
+# - Privilege model: the web service itself still runs as $KIOSK_USER
+#   with zero ambient sudo. A new narrow, allow-listed root helper
+#   (menus/addon_webui.sh's webui_write_helper_script, reachable only
+#   via a single-path passwordless sudo rule generated and validated
+#   with `visudo -c -f` before being installed) is the only way the web
+#   UI ever gains privilege, and it re-checks its own fixed action
+#   allow-list before dispatching anything - a request that reaches it
+#   can only ever trigger one of five vetted actions, never a root
+#   shell. Chosen over running the whole service as root after asking
+#   directly: this repo has no login of its own by design (Authelia
+#   runs elsewhere), so a request that reaches it with no reverse proxy
+#   in front is effectively unauthenticated - the allow-list bounds
+#   what that can actually do.
+# - Long-running installs stream live output to the browser via
+#   Server-Sent Events (webui/lib/jobs.js), with only one action
+#   running at a time (a second request while one is in flight gets a
+#   clear 409, not silently queued or dropped).
+# - Full visual redesign: a sidebar shell (Sites/Display/Lockout/
+#   Addons/Update) replacing the single scrolling page of three cards,
+#   both light and dark themes via prefers-color-scheme, no external
+#   font/CDN dependency.
+# - A real bug was found and fixed by actually driving the redesigned
+#   UI in a headless browser, not just by reading the code: refreshing
+#   an addon's pill/button after a successful install used to rebuild
+#   the whole card, which raced (and usually lost to) the success
+#   status/log that same job had just written a moment earlier. Fixed
+#   to update pill/buttons in place, leaving the completed job's log
+#   exactly as the user left it.
+# - Uninstall-via-web is deliberately still not offered, for any addon -
+#   flagged as needing its own double-confirmation design, not bundled
+#   into this pass. WiFi, Timezone, Power/Display/Quiet Hours,
+#   Diagnostics, Remote Access, Authelia, Factory Reset, Virtual
+#   Consoles, Emergency Hotspot, Clone Settings, and the fleet/
+#   multi-kiosk dashboard all remain out of scope for the web UI too,
+#   each a named, sequenced follow-up rather than an oversight.
+#
+# RELEASE v2.16.0 - Web UI: Browser-Based Config Editor (install.sh ->
+#                    Addons -> Web UI)
+# - New: a small Node/Express app (webui/) installable via ./install.sh's
+#   Addons menu, giving a browser-based editor for Sites & Page Timing,
+#   Display & Interaction, and Password Protection & Lockout - the three
+#   Core Settings menus that are pure config.json read/write with no
+#   privileged system mutation involved. Runs as a systemd service under
+#   $KIOSK_USER (the same user Electron runs as), so it never needs sudo
+#   - it can read/write config.json directly with normal filesystem
+#   permissions. webui/lib/config.js re-implements lib/config.sh's exact
+#   schema and merge-on-save contract in JS (kiosk-app/main.js already
+#   reads the same file directly in JS - established precedent, not a
+#   new pattern), so it can never silently clobber fields it doesn't
+#   track (Authelia's credentials, quiet-hours fields, etc) - the same
+#   failure mode previously fixed in lib/config.sh's own history.
+# - No login of its own, by design - Authelia runs elsewhere, and the
+#   expectation is a reverse proxy (e.g. Caddy) with Authelia forward-
+#   auth in front of it, the same way other self-hosted apps get
+#   protected. Direct LAN access with no proxy in front has no
+#   authentication at all - treat it like SSH access to the kiosk.
+# - Deliberately narrow scope for this first pass: WiFi, Timezone,
+#   Power/Display/Quiet Hours, Complete Uninstall, every other addon,
+#   and everything in Advanced remain terminal-only - a network-facing
+#   process shouldn't be handed sudo-level system mutation (netplan,
+#   timedatectl, apt, systemd timers) without a lot more thought than
+#   this pass gives it. A "restart kiosk display" action was left out
+#   for the same reason - would need a narrow polkit grant, follow-up.
+# - Wired into Complete Uninstall (webui_do_uninstall) and Clone Settings
+#   (webui addon-presence detection) the same way every other addon is.
+# - This is the single-kiosk piece of the planned web-based GUI
+#   (mentioned in this repo's "Modular Management" notes for a while) -
+#   a central multi-kiosk fleet dashboard is an intentional follow-up,
+#   not part of this pass.
+#
 # RELEASE v2.15.0 - Upgrade Migrated to install.sh (Advanced -> Upgrade)
 # - New in ./install.sh's Advanced menu: Upgrade. Not a port of this
 #   script's Upgrade - that one re-extracted main.js/preload.js/etc from
@@ -546,7 +633,7 @@ set -euo pipefail
 ### SECTION 1: CONSTANTS & GLOBALS
 ################################################################################

-SCRIPT_VERSION="2.15.0"
+SCRIPT_VERSION="2.17.0"

 # Resolve the real path to this script file.
 # When piped (curl|bash or wget|bash), BASH_SOURCE[0] is a pipe descriptor,
@@ -0,0 +1,171 @@
+'use strict';
+
+// webui/lib/actions.js - the web UI's allow-list of privileged actions,
+// and how to turn a web form's fields into the exact stdin sequence the
+// real bash `action_*` function expects.
+//
+// Mirrors menus/addon_webui.sh's ALLOWED_ACTIONS array (inside the
+// generated kiosk-webui-helper script) - kept in sync by hand rather
+// than shared/generated, since both lists are short and deliberately
+// curated. A mismatch between the two just means an action fails closed
+// on whichever side is missing it, never open on both: server.js checks
+// this list before spawning anything, and the helper script re-checks
+// its own list before dispatching regardless of what server.js sent.
+//
+// Every buildStdin() below was verified against the real menus/*.sh
+// source (prompt order, defaults, and which fields reject a blank
+// answer and re-prompt) - see webui/test/actions.test.js, which drives
+// the actual bash functions with this exact output and checks the real
+// resulting state (cups_is_installed, lms_is_installed, etc), not just
+// that the process exits 0.
+
+const ACTIONS = {
+    install_cups: {
+        helperAction: 'action_install_cups',
+        label: 'Install CUPS Printing',
+        fields: [],
+        // action_install_cups's only prompt is "Install CUPS printing?
+        // (n)" - the web UI's own install button is the confirmation,
+        // so this always answers yes. No pause() in this function.
+        buildStdin() {
+            return 'y\n';
+        },
+    },
+
+    reconfigure_cups: {
+        helperAction: 'action_reconfigure_cups',
+        label: 'Reconfigure CUPS for network access',
+        fields: [],
+        // No prompts at all, no pause().
+        buildStdin() {
+            return '';
+        },
+    },
+
+    install_lms: {
+        helperAction: 'action_install_lms',
+        label: 'Install / reconfigure LMS Server',
+        // fields.alreadyInstalled must reflect real current state
+        // (server.js fills this in from lms_is_installed via the
+        // helper's own status check before offering the reconfigure
+        // fields) - action_install_lms branches on it internally and a
+        // wrong guess here desyncs the stdin sequence from what the
+        // real function actually prompts for.
+        fields: ['alreadyInstalled', 'reconfigurePort', 'newPort'],
+        buildStdin(f) {
+            if (f.alreadyInstalled) {
+                if (!f.reconfigurePort) {
+                    return 'n\n\n'; // decline reconfigure, then pause()
+                }
+                const port = Number(f.newPort);
+                if (!Number.isInteger(port) || port < 1 || port > 65535) {
+                    throw new Error('newPort must be an integer 1-65535');
+                }
+                return `y\n${port}\n\n`; // accept, new port, pause()
+            }
+            return '\n'; // fresh install: fully automated except pause()
+        },
+    },
+
+    install_squeezelite: {
+        helperAction: 'action_install_squeezelite',
+        label: 'Install / reconfigure Squeezelite Player',
+        // If already installed, the real function first asks
+        // "Reconfigure?" (default n) and, if declined, returns
+        // immediately after just the pause() - it does NOT fall through
+        // to the player-name/server prompts. f.reconfigure must be
+        // explicit (not inferred from other fields) so the web UI can
+        // offer "leave it as-is" without also having to resend the
+        // current values.
+        fields: ['alreadyInstalled', 'reconfigure', 'playerName', 'lmsServer'],
+        buildStdin(f) {
+            if (f.alreadyInstalled && !f.reconfigure) {
+                return 'n\n\n'; // decline reconfigure, then pause()
+            }
+            const lines = [];
+            if (f.alreadyInstalled) lines.push('y'); // "Reconfigure?"
+            lines.push(f.playerName || ''); // blank -> "Kiosk" default
+            lines.push(f.lmsServer || ''); // blank -> auto-discovery
+            // "Reboot now?" is always answered "n" here regardless of
+            // what the UI shows - triggering a real `sudo reboot` from
+            // inside a one-click addon-install action is out of scope
+            // for this pass (see webui phase-2 plan). The UI surfaces
+            // "reboot required to start Squeezelite" as an info banner
+            // instead of a real remote reboot trigger.
+            lines.push('n');
+            lines.push(''); // pause()
+            return lines.join('\n') + '\n';
+        },
+    },
+
+    configure_asterisk_intercom: {
+        helperAction: 'action_configure_asterisk_intercom',
+        label: 'Configure Asterisk Intercom',
+        // Same shape as Squeezelite's reconfigure gate: if already
+        // installed, the real function asks "Reconfigure with a
+        // different server/extension?" (default n) and returns after
+        // just the pause() if declined - the rest of this sequence is
+        // never reached in that case.
+        fields: ['alreadyInstalled', 'reconfigure', 'serverIp', 'serverPort', 'extension', 'password', 'autoAnswer', 'useTls'],
+        buildStdin(f) {
+            if (f.alreadyInstalled && !f.reconfigure) {
+                return 'n\n\n'; // decline reconfigure, then pause()
+            }
+            const lines = [];
+            // Only present at all when baresip_is_installed is already
+            // true - a fresh install has no "Reconfigure?" prompt.
+            if (f.alreadyInstalled) lines.push('y');
+
+            // Server IP and extension reject a blank answer and
+            // re-prompt (a `while [[ -z ... ]]` loop in the real
+            // function) - sending an empty line here would desync the
+            // rest of the sequence by consuming a second prompt cycle,
+            // so these are validated up front instead.
+            if (!f.serverIp || !String(f.serverIp).trim()) throw new Error('serverIp is required');
+            lines.push(String(f.serverIp).trim());
+
+            lines.push(f.serverPort != null && f.serverPort !== '' ? String(f.serverPort) : '');
+
+            if (!f.extension || !String(f.extension).trim()) throw new Error('extension is required');
+            lines.push(String(f.extension).trim());
+
+            // Password also rejects blank and re-prompts, same reason.
+            if (!f.password) throw new Error('password is required');
+            lines.push(f.password);
+
+            lines.push(f.autoAnswer ? 'y' : 'n');
+            lines.push(f.useTls ? 'y' : 'n');
+            // "Proceed with installation?" (default y) - already
+            // confirmed by the web click that got us here.
+            lines.push('y');
+            lines.push(''); // pause()
+            return lines.join('\n') + '\n';
+        },
+    },
+
+    upgrade: {
+        helperAction: 'action_upgrade',
+        label: 'Check for and apply updates',
+        fields: [],
+        buildStdin() {
+            // action_upgrade's own flow: "Pull these changes...?" (y),
+            // then - only if there was anything to pull -
+            // "Restart kiosk display now...?" (y), then always
+            // "Check for and install the latest Electron...?", answered
+            // n here. That sub-flow's own prompts default to declining
+            // and aren't a good fit for one-click automation yet (see
+            // webui phase-2 plan, "Explicitly deferred"). Answering "n"
+            // to a prompt that never actually gets shown (nothing to
+            // pull, or the display-restart question) is harmless - a
+            // synthesized line bash never reads is simply left unread,
+            // not an error.
+            return 'y\ny\nn\n';
+        },
+    },
+};
+
+function getAction(name) {
+    return Object.prototype.hasOwnProperty.call(ACTIONS, name) ? ACTIONS[name] : undefined;
+}
+
+module.exports = { ACTIONS, getAction };
@@ -0,0 +1,161 @@
+'use strict';
+
+// webui/lib/config.js - config.json read/write for the web UI.
+//
+// Mirrors lib/config.sh's load_existing_config()/save_config() contract
+// exactly, in JS instead of jq, so the web UI and the terminal menus stay
+// in sync against the same file without either one going through the
+// other. kiosk-app/main.js already reads this same config.json directly
+// in JS (its own fs.readFileSync/JSON.parse, no bash involved) - this is
+// established precedent in this repo, not a new pattern.
+//
+// Tracks exactly the fields Sites & Page Timing (menus/sites.sh),
+// Display & Interaction (menus/display.sh), and Password Protection &
+// Lockout (menus/lockout.sh) track. lockoutActiveStart/lockoutActiveEnd
+// are deliberately excluded, matching lockout.sh's own header comment:
+// "the app doesn't act on them... lib/config.sh just carries whatever is
+// already in config.json through unchanged." Anything else present in an
+// existing file (autheliaURL, autheliaUsername,
+// autheliaEncryptedPassword, lockoutActiveStart/End, or any future field)
+// is opaque passthrough data - saveConfig() merges onto it, never
+// rebuilds from nothing, so none of it is ever silently deleted. That
+// exact failure mode was a real, previously-fixed bug in lib/config.sh's
+// own history (see its header/body comments) and must not be
+// reintroduced here.
+
+const fs = require('fs');
+const path = require('path');
+const crypto = require('crypto');
+
+const CONFIG_PATH = process.env.CONFIG_PATH;
+if (!CONFIG_PATH) {
+    throw new Error("CONFIG_PATH environment variable is required (path to the kiosk app's config.json)");
+}
+
+const SCALAR_DEFAULTS = {
+    swipeMode: 'dual',
+    allowNavigation: 'same-origin',
+    homeTabIndex: -1,
+    inactivityTimeout: 120,
+    enablePauseButton: true,
+    enableKeyboardButton: true,
+    enableNavButton: true,
+    enablePasswordProtection: false,
+    lockoutTimeout: 0,
+    lockoutAtTime: '',
+    requirePasswordOnBoot: false,
+};
+
+function readExisting() {
+    try {
+        const raw = fs.readFileSync(CONFIG_PATH, 'utf8');
+        const parsed = JSON.parse(raw);
+        if (parsed && typeof parsed === 'object' && !Array.isArray(parsed)) return parsed;
+    } catch (e) {
+        // Missing file or invalid JSON - same fallback save_config() uses
+        // in lib/config.sh ("{}" when the file is absent/unparsable).
+    }
+    return {};
+}
+
+function normalizeTab(t) {
+    return {
+        url: typeof t.url === 'string' ? t.url : '',
+        duration: Number.isFinite(Number(t.duration)) ? Number(t.duration) : 0,
+        username: typeof t.username === 'string' ? t.username : '',
+        password: typeof t.password === 'string' ? t.password : '',
+        name: typeof t.name === 'string' ? t.name : '',
+    };
+}
+
+function hashPassword(plaintext) {
+    return crypto.createHash('sha256').update(plaintext, 'utf8').digest('hex');
+}
+
+// Mirrors load_existing_config(). Never returns a site's Basic Auth
+// password or the lockout password hash - both are write-only from here,
+// same as the terminal menus, which never display a stored password back
+// either (sites.sh's edit_page_status only ever shows the username;
+// lockout.sh has no "show current password" path at all).
+function loadConfig() {
+    const existing = readExisting();
+    const tabs = Array.isArray(existing.tabs) ? existing.tabs.map(normalizeTab) : [];
+
+    const out = {
+        tabs: tabs.map((t) => ({
+            url: t.url,
+            duration: t.duration,
+            username: t.username,
+            hasPassword: t.password.length > 0,
+            name: t.name,
+        })),
+    };
+    for (const [key, def] of Object.entries(SCALAR_DEFAULTS)) {
+        out[key] = key in existing ? existing[key] : def;
+    }
+    out.hasLockoutPassword = typeof existing.lockoutPassword === 'string' && existing.lockoutPassword.length > 0;
+    out.dualSwipe = out.swipeMode === 'dual';
+    return out;
+}
+
+// Mirrors save_config(): merge known fields onto whatever's already on
+// disk (see file header). `patch` fields are applied only when present -
+// omitting a field means "leave it as it is", so each frontend section
+// (Sites / Display / Lockout) can PUT just the fields it owns.
+function saveConfig(patch) {
+    const existing = readExisting();
+    const merged = { ...existing };
+
+    for (const [key, def] of Object.entries(SCALAR_DEFAULTS)) {
+        if (!(key in merged)) merged[key] = def;
+    }
+    for (const key of Object.keys(SCALAR_DEFAULTS)) {
+        if (key in patch) merged[key] = patch[key];
+    }
+
+    // Password: only touched when the caller explicitly provides a new
+    // plaintext value to hash. Disabling protection clears the whole
+    // lockout state, mirroring lockout.sh's action_disable_protection()
+    // exactly (not just the enabled flag - the password/timeout/daily
+    // lock time too).
+    if (!('lockoutPassword' in merged)) merged.lockoutPassword = '';
+    if (typeof patch.newLockoutPassword === 'string' && patch.newLockoutPassword.length > 0) {
+        merged.lockoutPassword = hashPassword(patch.newLockoutPassword);
+    }
+    if (patch.enablePasswordProtection === false) {
+        merged.lockoutPassword = '';
+        merged.lockoutTimeout = 0;
+        merged.lockoutAtTime = '';
+        merged.requirePasswordOnBoot = false;
+    }
+
+    if (Array.isArray(patch.tabs)) {
+        const existingTabs = Array.isArray(existing.tabs) ? existing.tabs.map(normalizeTab) : [];
+        merged.tabs = patch.tabs.map((t, i) => {
+            const norm = normalizeTab(t);
+            if (typeof t.password !== 'string') {
+                // No new password supplied for this tab - keep whatever
+                // was already stored at this position (tabs are
+                // positional, not ID-based, matching the bash arrays).
+                norm.password = existingTabs[i] ? existingTabs[i].password : '';
+            }
+            return norm;
+        });
+    } else if (!Array.isArray(merged.tabs)) {
+        merged.tabs = [];
+    }
+
+    merged.autoswitch = true;
+    merged.enableTouch = true;
+    merged.dualSwipe = merged.swipeMode === 'dual';
+
+    const dir = path.dirname(CONFIG_PATH);
+    fs.mkdirSync(dir, { recursive: true });
+    const tmp = path.join(dir, `.config.json.tmp-${process.pid}-${Date.now()}`);
+    fs.writeFileSync(tmp, JSON.stringify(merged, null, 2) + '\n', { mode: 0o644 });
+    fs.renameSync(tmp, CONFIG_PATH);
+
+    return loadConfig();
+}
+
+module.exports = { loadConfig, saveConfig, CONFIG_PATH, SCALAR_DEFAULTS };
@@ -0,0 +1,97 @@
+'use strict';
+
+// webui/lib/jobs.js - runs one privileged action at a time via the
+// allow-listed root helper (menus/addon_webui.sh's kiosk-webui-helper),
+// and keeps an in-memory log so /api/actions/:name/run's caller and any
+// number of SSE stream reconnects all see the same output. No database -
+// this tool manages one kiosk, a Map is plenty.
+//
+// HELPER_PATH and SUDO_CMD are both overridable via environment (see
+// webui/test/jobs.test.js): tests point HELPER_PATH at a small fake
+// script and clear SUDO_CMD, so the real test suite never needs actual
+// root or a real addon install - the same principle as every stubbed
+// bash test in this project, just on the Node side.
+
+const { spawn } = require('child_process');
+const { randomUUID } = require('crypto');
+const { getAction } = require('./actions');
+
+const HELPER_PATH = process.env.HELPER_PATH || '/usr/local/bin/kiosk-webui-helper';
+const SUDO_CMD = process.env.SUDO_CMD !== undefined ? process.env.SUDO_CMD : 'sudo';
+
+const jobs = new Map();
+let activeJobId = null;
+
+function startJob(actionName, fields) {
+    const action = getAction(actionName);
+    if (!action) {
+        const err = new Error(`Unknown action: ${actionName}`);
+        err.status = 400;
+        throw err;
+    }
+    if (activeJobId) {
+        const err = new Error('Another action is already running - wait for it to finish first');
+        err.status = 409;
+        throw err;
+    }
+
+    // buildStdin() validates its own required fields and throws a plain
+    // Error with a human-readable message on bad input - treated as a
+    // 400 here, before anything is spawned.
+    let stdin;
+    try {
+        stdin = action.buildStdin(fields || {});
+    } catch (e) {
+        e.status = 400;
+        throw e;
+    }
+
+    const jobId = randomUUID();
+    const job = {
+        id: jobId,
+        name: actionName,
+        label: action.label,
+        status: 'running',
+        log: [],
+        exitCode: null,
+        listeners: new Set(),
+    };
+    jobs.set(jobId, job);
+    activeJobId = jobId;
+
+    const child = SUDO_CMD
+        ? spawn(SUDO_CMD, [HELPER_PATH, action.helperAction])
+        : spawn(HELPER_PATH, [action.helperAction]);
+
+    const appendLine = (chunk) => {
+        const text = chunk.toString();
+        job.log.push(text);
+        for (const listener of job.listeners) listener(text);
+    };
+    child.stdout.on('data', appendLine);
+    child.stderr.on('data', appendLine);
+
+    const finish = (status, exitCode) => {
+        if (job.status !== 'running') return; // 'error' and 'close' can both fire
+        job.status = status;
+        job.exitCode = exitCode;
+        for (const listener of job.listeners) listener(null);
+        if (activeJobId === jobId) activeJobId = null;
+    };
+    child.on('close', (code) => finish(code === 0 ? 'success' : 'failed', code));
+    child.on('error', (err) => {
+        job.log.push(`\n[error] ${err.message}\n`);
+        finish('failed', null);
+    });
+
+    child.stdin.write(stdin);
+    child.stdin.end();
+
+    return job;
+}
+
+function getJob(jobId) {
+    return jobs.get(jobId);
+}
+
+module.exports = { startJob, getJob };
@@ -0,0 +1,828 @@
+{
+  "name": "kiosk-webui",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "kiosk-webui",
+      "version": "1.0.0",
+      "dependencies": {
+        "express": "^4.19.0"
+      }
+    },
+    "node_modules/accepts": {
+      "version": "1.3.8",
+      "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
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+      "license": "MIT",
+      "dependencies": {
+        "mime-types": "~2.1.34",
+        "negotiator": "0.6.3"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/array-flatten": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
+      "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg==",
+      "license": "MIT"
+    },
+    "node_modules/body-parser": {
+      "version": "1.20.6",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.6.tgz",
+      "integrity": "sha512-p5tAzS57i5MV9fZFDj9LeIiTZEufbSe2eDozP+ElheSUq1m74CRq1jI4mYNDdVs9vQztXFLuk/Gd6BWTdwRJ5g==",
+      "license": "MIT",
+      "dependencies": {
+        "bytes": "~3.1.2",
+        "content-type": "~1.0.5",
+        "debug": "2.6.9",
+        "depd": "2.0.0",
+        "destroy": "~1.2.0",
+        "http-errors": "~2.0.1",
+        "iconv-lite": "~0.4.24",
+        "on-finished": "~2.4.1",
+        "qs": "~6.15.1",
+        "raw-body": "~2.5.3",
+        "type-is": "~1.6.18",
+        "unpipe": "~1.0.0"
+      },
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+        "npm": "1.2.8000 || >= 1.4.16"
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+        "url": "https://github.com/sponsors/ljharb"
+      }
+    },
+    "node_modules/statuses": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.2.tgz",
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+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/toidentifier": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.1.tgz",
+      "integrity": "sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=0.6"
+      }
+    },
+    "node_modules/type-is": {
+      "version": "1.6.18",
+      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
+      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
+      "license": "MIT",
+      "dependencies": {
+        "media-typer": "0.3.0",
+        "mime-types": "~2.1.24"
+      },
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/unpipe": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
+      "integrity": "sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
+    "node_modules/utils-merge": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
+      "integrity": "sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.4.0"
+      }
+    },
+    "node_modules/vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    }
+  }
+}
@@ -0,0 +1,8 @@
+{
+  "name": "kiosk-webui",
+  "version": "1.0.0",
+  "main": "server.js",
+  "dependencies": {
+    "express": "^4.19.0"
+  }
+}
@@ -0,0 +1,622 @@
+'use strict';
+
+// webui/public/app.js - vanilla JS, no framework/build step. Every
+// user-controlled value (site URL/name/username, addon form fields) is
+// set via .value or .textContent, never innerHTML, so nothing typed
+// into a form can execute as markup - the one new attack surface a
+// browser-based config UI has that the terminal menus never did.
+
+const msgEl = document.getElementById('msg');
+let currentConfig = null;
+
+function showMessage(text, isError) {
+    msgEl.textContent = text;
+    msgEl.hidden = false;
+    msgEl.className = 'banner ' + (isError ? 'error' : 'success');
+    clearTimeout(showMessage._t);
+    showMessage._t = setTimeout(() => { msgEl.hidden = true; }, 5000);
+}
+
+/* ---------------------------------------------------------------------- */
+/* Sidebar navigation                                                     */
+/* ---------------------------------------------------------------------- */
+
+document.querySelectorAll('.nav-item').forEach((btn) => {
+    btn.addEventListener('click', () => {
+        document.querySelectorAll('.nav-item').forEach((b) => b.classList.remove('active'));
+        document.querySelectorAll('.page').forEach((p) => p.classList.remove('active'));
+        btn.classList.add('active');
+        document.getElementById(`page-${btn.dataset.page}`).classList.add('active');
+    });
+});
+
+document.getElementById('brand-sub').textContent = location.host || 'this kiosk';
+
+/* ---------------------------------------------------------------------- */
+/* Config API (Sites / Display / Lockout)                                 */
+/* ---------------------------------------------------------------------- */
+
+async function apiGet() {
+    const res = await fetch('/api/config');
+    if (!res.ok) throw new Error('Failed to load configuration');
+    return res.json();
+}
+
+async function apiPut(patch) {
+    const res = await fetch('/api/config', {
+        method: 'PUT',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify(patch),
+    });
+    const data = await res.json().catch(() => ({}));
+    if (!res.ok) throw new Error(data.error || 'Save failed');
+    return data;
+}
+
+/* ---------------------------------------------------------------------- */
+/* Sites & Page Timing                                                    */
+/* ---------------------------------------------------------------------- */
+
+const sitesList = document.getElementById('sites-list');
+const siteRowTemplate = document.getElementById('site-row-template');
+
+function renderSites(tabs) {
+    sitesList.textContent = '';
+    tabs.forEach((tab, idx) => sitesList.appendChild(buildSiteRow(tab, idx)));
+    if (tabs.length === 0) {
+        const p = document.createElement('p');
+        p.className = 'hint';
+        p.textContent = 'No pages configured yet.';
+        sitesList.appendChild(p);
+    }
+}
+
+function buildSiteRow(tab, idx) {
+    const node = siteRowTemplate.content.firstElementChild.cloneNode(true);
+    node.dataset.index = String(idx);
+
+    node.querySelector('.site-url').value = tab.url || '';
+    node.querySelector('.site-name').value = tab.name || '';
+    node.querySelector('.site-duration').value = tab.duration ?? 180;
+
+    const authEnable = node.querySelector('.site-auth-enable');
+    const authUser = node.querySelector('.site-auth-username');
+    const authState = node.querySelector('.auth-state');
+    const hasAuth = !!(tab.username || tab.hasPassword);
+    authEnable.checked = hasAuth;
+    authUser.value = tab.username || '';
+    authState.textContent = hasAuth ? '(enabled)' : '(disabled)';
+
+    node.querySelector('.remove-site').addEventListener('click', () => {
+        node.remove();
+        if (!sitesList.querySelector('.site-row')) renderSites([]);
+    });
+
+    return node;
+}
+
+document.getElementById('add-site').addEventListener('click', () => {
+    if (sitesList.querySelector('.hint')) sitesList.textContent = '';
+    sitesList.appendChild(buildSiteRow({ url: '', name: '', duration: 180, username: '', hasPassword: false }, sitesList.children.length));
+    updateHomeTabOptions(collectTabs());
+});
+document.getElementById('save-sites').addEventListener('click', saveSites);
+
+function collectTabs() {
+    return Array.from(sitesList.querySelectorAll('.site-row')).map((row) => {
+        const tab = {
+            url: row.querySelector('.site-url').value.trim(),
+            name: row.querySelector('.site-name').value.trim(),
+            duration: parseInt(row.querySelector('.site-duration').value, 10),
+        };
+        const authEnabled = row.querySelector('.site-auth-enable').checked;
+        if (authEnabled) {
+            tab.username = row.querySelector('.site-auth-username').value;
+            const newPass = row.querySelector('.site-auth-password').value;
+            if (newPass) tab.password = newPass;
+        } else {
+            tab.username = '';
+            tab.password = '';
+        }
+        return tab;
+    });
+}
+
+async function saveSites() {
+    const tabs = collectTabs();
+    if (tabs.some((t) => !t.url)) {
+        showMessage('Every site needs a URL', true);
+        return;
+    }
+    try {
+        currentConfig = await apiPut({ tabs });
+        showMessage('Sites saved');
+        renderSites(currentConfig.tabs);
+        populateAll(currentConfig);
+    } catch (e) {
+        showMessage(e.message, true);
+    }
+}
+
+sitesList.addEventListener('change', () => { updateHomeTabOptions(collectTabs()); });
+
+/* ---------------------------------------------------------------------- */
+/* Display & Interaction                                                  */
+/* ---------------------------------------------------------------------- */
+
+const displayForm = document.getElementById('display-form');
+const homeTabSelect = document.getElementById('home-tab-select');
+
+function updateHomeTabOptions(tabs) {
+    const previous = homeTabSelect.value;
+    homeTabSelect.textContent = '';
+    const disabledOpt = document.createElement('option');
+    disabledOpt.value = '-1';
+    disabledOpt.textContent = 'Disabled';
+    homeTabSelect.appendChild(disabledOpt);
+    tabs.forEach((tab, idx) => {
+        const opt = document.createElement('option');
+        opt.value = String(idx);
+        opt.textContent = tab.name || tab.url || `Page ${idx + 1}`;
+        homeTabSelect.appendChild(opt);
+    });
+    const stillValid = Array.from(homeTabSelect.options).some((o) => o.value === previous);
+    homeTabSelect.value = stillValid ? previous : '-1';
+}
+
+displayForm.addEventListener('submit', async (e) => {
+    e.preventDefault();
+    const fd = new FormData(displayForm);
+    const patch = {
+        swipeMode: fd.get('swipeMode'),
+        allowNavigation: fd.get('allowNavigation'),
+        enablePauseButton: fd.get('enablePauseButton') === 'on',
+        enableKeyboardButton: fd.get('enableKeyboardButton') === 'on',
+        enableNavButton: fd.get('enableNavButton') === 'on',
+        homeTabIndex: parseInt(fd.get('homeTabIndex'), 10),
+        inactivityTimeoutMinutes: parseInt(fd.get('inactivityTimeoutMinutes'), 10),
+    };
+    try {
+        currentConfig = await apiPut(patch);
+        showMessage('Display & Interaction saved');
+        populateAll(currentConfig);
+    } catch (err) {
+        showMessage(err.message, true);
+    }
+});
+
+/* ---------------------------------------------------------------------- */
+/* Password Protection & Lockout                                          */
+/* ---------------------------------------------------------------------- */
+
+const lockoutForm = document.getElementById('lockout-form');
+const lockoutEnabled = document.getElementById('lockout-enabled');
+const lockoutFields = document.getElementById('lockout-fields');
+const dailyLockEnabled = document.getElementById('daily-lock-enabled');
+const lockoutAtTime = document.getElementById('lockout-at-time');
+const passwordLabel = document.getElementById('password-label');
+
+function refreshLockoutFieldVisibility() {
+    lockoutFields.hidden = !lockoutEnabled.checked;
+}
+lockoutEnabled.addEventListener('change', refreshLockoutFieldVisibility);
+
+dailyLockEnabled.addEventListener('change', () => {
+    lockoutAtTime.disabled = !dailyLockEnabled.checked;
+    if (!dailyLockEnabled.checked) lockoutAtTime.value = '';
+});
+
+lockoutForm.addEventListener('submit', async (e) => {
+    e.preventDefault();
+    const fd = new FormData(lockoutForm);
+    const enable = fd.get('enablePasswordProtection') === 'on';
+    const newPassword = fd.get('newLockoutPassword') || '';
+    const confirmPassword = document.getElementById('lockout-password-confirm').value;
+
+    if (newPassword && newPassword !== confirmPassword) {
+        showMessage("Passwords don't match", true);
+        return;
+    }
+    if (enable && !newPassword && !(currentConfig && currentConfig.hasLockoutPassword)) {
+        showMessage('Set a lockout password before enabling password protection', true);
+        return;
+    }
+
+    const patch = { enablePasswordProtection: enable };
+    if (enable) {
+        if (newPassword) patch.newLockoutPassword = newPassword;
+        patch.lockoutTimeoutMinutes = parseInt(fd.get('lockoutTimeoutMinutes'), 10);
+        patch.lockoutAtTime = dailyLockEnabled.checked ? fd.get('lockoutAtTime') : '';
+        patch.requirePasswordOnBoot = fd.get('requirePasswordOnBoot') === 'on';
+    }
+
+    try {
+        currentConfig = await apiPut(patch);
+        showMessage('Password Protection & Lockout saved');
+        populateAll(currentConfig);
+        lockoutForm.querySelector('[name=newLockoutPassword]').value = '';
+        document.getElementById('lockout-password-confirm').value = '';
+    } catch (err) {
+        showMessage(err.message, true);
+    }
+});
+
+function populateAll(config) {
+    displayForm.elements.swipeMode.value = config.swipeMode;
+    displayForm.elements.allowNavigation.value = config.allowNavigation;
+    displayForm.elements.enablePauseButton.checked = !!config.enablePauseButton;
+    displayForm.elements.enableKeyboardButton.checked = !!config.enableKeyboardButton;
+    displayForm.elements.enableNavButton.checked = !!config.enableNavButton;
+    updateHomeTabOptions(config.tabs);
+    homeTabSelect.value = String(config.homeTabIndex);
+    displayForm.elements.inactivityTimeoutMinutes.value = Math.round(config.inactivityTimeout / 60);
+
+    lockoutEnabled.checked = !!config.enablePasswordProtection;
+    passwordLabel.textContent = config.hasLockoutPassword ? 'New password (leave blank to keep the current one)' : 'Set lockout password';
+    lockoutForm.elements.lockoutTimeoutMinutes.value = config.lockoutTimeout;
+    dailyLockEnabled.checked = !!config.lockoutAtTime;
+    lockoutAtTime.disabled = !config.lockoutAtTime;
+    lockoutAtTime.value = config.lockoutAtTime || '';
+    lockoutForm.elements.requirePasswordOnBoot.checked = !!config.requirePasswordOnBoot;
+    refreshLockoutFieldVisibility();
+}
+
+/* ---------------------------------------------------------------------- */
+/* Shared: run a privileged action and stream its log via SSE             */
+/* ---------------------------------------------------------------------- */
+
+// jobPanelEls = { panel, status, log }. Returns a promise resolving to
+// {status, exitCode} once the job finishes (or rejects on a request-level
+// error before a job even started, e.g. validation).
+async function runAction(actionName, fields, jobPanelEls) {
+    const res = await fetch(`/api/actions/${actionName}/run`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify(fields || {}),
+    });
+    const body = await res.json().catch(() => ({}));
+    if (!res.ok) throw new Error(body.error || 'Could not start action');
+
+    jobPanelEls.panel.classList.add('open');
+    jobPanelEls.log.textContent = '';
+    setJobStatus(jobPanelEls.status, 'running');
+
+    return new Promise((resolve, reject) => {
+        const source = new EventSource(`/api/actions/jobs/${body.jobId}/stream`);
+        source.addEventListener('log', (ev) => {
+            jobPanelEls.log.textContent += JSON.parse(ev.data);
+            jobPanelEls.log.scrollTop = jobPanelEls.log.scrollHeight;
+        });
+        source.addEventListener('done', (ev) => {
+            const result = JSON.parse(ev.data);
+            setJobStatus(jobPanelEls.status, result.status);
+            source.close();
+            resolve(result);
+        });
+        source.onerror = () => {
+            source.close();
+            reject(new Error('Lost connection to the log stream'));
+        };
+    });
+}
+
+function setJobStatus(el, status) {
+    el.className = `job-status ${status}`;
+    if (status === 'running') {
+        el.innerHTML = '';
+        const spinner = document.createElement('span');
+        spinner.className = 'spinner';
+        el.appendChild(spinner);
+        el.appendChild(document.createTextNode('Running'));
+    } else {
+        el.textContent = status === 'success' ? 'Success' : 'Failed';
+    }
+}
+
+/* ---------------------------------------------------------------------- */
+/* Addons                                                                 */
+/* ---------------------------------------------------------------------- */
+
+const addonsList = document.getElementById('addons-list');
+const addonCardTemplate = document.getElementById('addon-card-template');
+
+const ICONS = {
+    printer: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M6 9V3h12v6M6 18H4a2 2 0 0 1-2-2v-5a2 2 0 0 1 2-2h16a2 2 0 0 1 2 2v5a2 2 0 0 1-2 2h-2"/><rect x="6" y="14" width="12" height="7"/></svg>',
+    music: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M9 18V5l12-2v13"/><circle cx="6" cy="18" r="3"/><circle cx="18" cy="16" r="3"/></svg>',
+    speaker: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="4" y="2" width="16" height="20" rx="2"/><circle cx="12" cy="14" r="4"/><circle cx="12" cy="6" r="1"/></svg>',
+    phone: '<svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M22 16.9v3a2 2 0 0 1-2.2 2 19.8 19.8 0 0 1-8.6-3.1 19.5 19.5 0 0 1-6-6 19.8 19.8 0 0 1-3.1-8.7A2 2 0 0 1 4.1 2h3a2 2 0 0 1 2 1.7c.1 1 .3 2 .6 2.9a2 2 0 0 1-.5 2.1L8 9.9a16 16 0 0 0 6 6l1.2-1.2a2 2 0 0 1 2.1-.5c.9.3 1.9.5 2.9.6a2 2 0 0 1 1.8 2Z"/></svg>',
+};
+
+function pillHtml(state) {
+    if (state === true) return '<span class="pill installed">Installed</span>';
+    if (state === false) return '<span class="pill not-installed">Not installed</span>';
+    return '<span class="pill unknown">Unknown</span>';
+}
+
+let addonStatus = {};
+
+async function loadAddonStatus() {
+    try {
+        const res = await fetch('/api/addons/status');
+        if (res.ok) addonStatus = await res.json();
+    } catch (e) {
+        // leave addonStatus as-is (pills show "Unknown"); not fatal to the page
+    }
+}
+
+// Keyed by addon, so a single card can be refreshed in place after its
+// own job finishes (see refreshAddonCard) without touching the other
+// three, and - critically - without recreating the job-panel/log the
+// user is currently looking at. An earlier version called the full
+// renderAddons() rebuild after every successful job "to update the
+// pill"; that raced (and usually lost to) the same success/log state it
+// had just written a moment earlier, since rebuilding the whole list
+// replaces the job-panel node with a fresh empty one. Caught by an
+// actual headless-browser run, not just reading the code - the log
+// looked fine reading it, but watching it in Chromium showed the
+// "Success" state flash and vanish.
+const ADDON_RECIPES = {};
+
+function buildAddonCard(recipe) {
+    ADDON_RECIPES[recipe.key] = recipe;
+    const node = addonCardTemplate.content.firstElementChild.cloneNode(true);
+    node.dataset.addon = recipe.key;
+    fillAddonCard(node, recipe);
+    return node;
+}
+
+// (Re)fills everything in a card EXCEPT the job-panel/log, which is
+// left exactly as it is - so refreshing a card's install-state after a
+// job finishes doesn't erase the result the user just watched stream in.
+function fillAddonCard(node, { key, title, desc, icon, buildForm }) {
+    node.querySelector('.addon-icon').innerHTML = ICONS[icon];
+    node.querySelector('.addon-name').textContent = title;
+    node.querySelector('.addon-desc').textContent = desc;
+    node.querySelector('.pill').outerHTML = pillHtml(addonStatus[key]);
+
+    const actionsEl = node.querySelector('.addon-actions');
+    const formEl = node.querySelector('.addon-form');
+    actionsEl.textContent = '';
+    formEl.textContent = '';
+    formEl.className = 'addon-form';
+
+    const jobPanelEls = {
+        panel: node.querySelector('.job-panel'),
+        status: node.querySelector('.job-status'),
+        log: node.querySelector('.job-log'),
+    };
+    buildForm({ node, actionsEl, formEl, jobPanelEls, installed: addonStatus[key] === true });
+}
+
+// Called after one addon's own job finishes - refreshes just that
+// card's pill/buttons/form (e.g. "Install" -> "Reconfigure") in place.
+async function refreshAddonCard(key) {
+    await loadAddonStatus();
+    const node = addonsList.querySelector(`[data-addon="${key}"]`);
+    if (node) fillAddonCard(node, ADDON_RECIPES[key]);
+}
+
+function addSubmitAction(formEl, jobPanelEls, actionName, collectFields, onDone) {
+    formEl.addEventListener('submit', async (e) => {
+        e.preventDefault();
+        const submitBtn = formEl.querySelector('button[type=submit]');
+        submitBtn.disabled = true;
+        try {
+            const result = await runAction(actionName, collectFields(), jobPanelEls);
+            if (result.status === 'success') {
+                showMessage('Done');
+                if (onDone) await onDone();
+            } else {
+                showMessage('Action failed - see the log below', true);
+            }
+        } catch (err) {
+            showMessage(err.message, true);
+        } finally {
+            submitBtn.disabled = false;
+        }
+    });
+}
+
+function renderAddons() {
+    addonsList.textContent = '';
+
+    // CUPS: no fields at all - the button itself is the whole form.
+    addonsList.appendChild(buildAddonCard({
+        key: 'cups', title: 'CUPS Printing', desc: 'Network printer sharing', icon: 'printer',
+        buildForm({ actionsEl, formEl, jobPanelEls, installed }) {
+            const btn = document.createElement('button');
+            btn.type = 'button';
+            btn.textContent = installed ? 'Reconfigure for network access' : 'Install CUPS Printing';
+            btn.addEventListener('click', async () => {
+                btn.disabled = true;
+                try {
+                    const action = installed ? 'reconfigure_cups' : 'install_cups';
+                    const result = await runAction(action, {}, jobPanelEls);
+                    if (result.status === 'success') { showMessage('Done'); await refreshAddonCard('cups'); }
+                    else showMessage('Action failed - see the log below', true);
+                } catch (err) {
+                    showMessage(err.message, true);
+                } finally {
+                    btn.disabled = false;
+                }
+            });
+            actionsEl.appendChild(btn);
+        },
+    }));
+
+    // LMS Server: fresh install has no fields; once installed, an
+    // optional port-reconfigure field.
+    addonsList.appendChild(buildAddonCard({
+        key: 'lms', title: 'LMS Server', desc: 'Lyrion / Logitech Media Server', icon: 'music',
+        buildForm({ actionsEl, formEl, jobPanelEls, installed }) {
+            if (!installed) {
+                const btn = document.createElement('button');
+                btn.type = 'button';
+                btn.textContent = 'Install LMS Server';
+                btn.addEventListener('click', async () => {
+                    btn.disabled = true;
+                    try {
+                        const result = await runAction('install_lms', { alreadyInstalled: false }, jobPanelEls);
+                        if (result.status === 'success') { showMessage('Done'); await refreshAddonCard('lms'); }
+                        else showMessage('Action failed - see the log below', true);
+                    } catch (err) {
+                        showMessage(err.message, true);
+                    } finally {
+                        btn.disabled = false;
+                    }
+                });
+                actionsEl.appendChild(btn);
+                return;
+            }
+            const toggleBtn = document.createElement('button');
+            toggleBtn.type = 'button';
+            toggleBtn.className = 'secondary';
+            toggleBtn.textContent = 'Reconfigure port';
+            toggleBtn.addEventListener('click', () => formEl.classList.toggle('open'));
+            actionsEl.appendChild(toggleBtn);
+
+            const portLabel = document.createElement('label');
+            portLabel.innerHTML = 'New HTTP port';
+            const portInput = document.createElement('input');
+            portInput.type = 'number'; portInput.min = '1'; portInput.max = '65535'; portInput.value = '9000';
+            portLabel.appendChild(portInput);
+            formEl.appendChild(portLabel);
+            const submitBtn = document.createElement('button');
+            submitBtn.type = 'submit';
+            submitBtn.textContent = 'Apply new port';
+            formEl.appendChild(submitBtn);
+
+            addSubmitAction(formEl, jobPanelEls, 'install_lms', () => ({
+                alreadyInstalled: true, reconfigurePort: true, newPort: parseInt(portInput.value, 10),
+            }), () => refreshAddonCard('lms'));
+        },
+    }));
+
+    // Squeezelite: player name + LMS server, both for install and
+    // reconfigure - the form is the same either way.
+    addonsList.appendChild(buildAddonCard({
+        key: 'squeezelite', title: 'Squeezelite Player', desc: 'Turns this kiosk into an LMS-connected speaker', icon: 'speaker',
+        buildForm({ actionsEl, formEl, jobPanelEls, installed }) {
+            formEl.classList.add('open');
+
+            const nameLabel = document.createElement('label');
+            nameLabel.textContent = 'Player name';
+            const nameInput = document.createElement('input');
+            nameInput.type = 'text'; nameInput.value = 'Kiosk'; nameInput.placeholder = 'Kiosk';
+            nameLabel.appendChild(nameInput);
+            formEl.appendChild(nameLabel);
+
+            const serverLabel = document.createElement('label');
+            serverLabel.innerHTML = 'LMS server <span class="hint">(IP:PORT, blank for auto-discovery)</span>';
+            const serverInput = document.createElement('input');
+            serverInput.type = 'text'; serverInput.placeholder = '192.168.1.100:3483';
+            serverLabel.appendChild(serverInput);
+            formEl.appendChild(serverLabel);
+
+            const rebootHint = document.createElement('p');
+            rebootHint.className = 'hint';
+            rebootHint.textContent = 'A reboot is required after install/reconfigure before Squeezelite starts.';
+            formEl.appendChild(rebootHint);
+
+            const submitBtn = document.createElement('button');
+            submitBtn.type = 'submit';
+            submitBtn.textContent = installed ? 'Reconfigure Squeezelite' : 'Install Squeezelite';
+            formEl.appendChild(submitBtn);
+
+            addSubmitAction(formEl, jobPanelEls, 'install_squeezelite', () => ({
+                alreadyInstalled: installed, reconfigure: true,
+                playerName: nameInput.value.trim(), lmsServer: serverInput.value.trim(),
+            }), () => refreshAddonCard('squeezelite'));
+        },
+    }));
+
+    // Asterisk Intercom: server/extension/password/options, always shown.
+    addonsList.appendChild(buildAddonCard({
+        key: 'asterisk_intercom', title: 'Asterisk Intercom', desc: 'SIP extension client (Baresip)', icon: 'phone',
+        buildForm({ actionsEl, formEl, jobPanelEls, installed }) {
+            formEl.classList.add('open');
+
+            const mk = (label, type, opts) => {
+                const l = document.createElement('label');
+                l.textContent = label;
+                const i = document.createElement('input');
+                i.type = type;
+                Object.assign(i, opts || {});
+                l.appendChild(i);
+                formEl.appendChild(l);
+                return i;
+            };
+            const ip = mk('Server IP or hostname', 'text', { placeholder: '10.0.0.5' });
+            const port = mk('Server port', 'number', { placeholder: '5060', min: '1', max: '65535' });
+            const ext = mk('Extension number', 'text', { placeholder: '201' });
+            const pass = mk('SIP password', 'password', { autocomplete: 'new-password' });
+
+            const autoAnswerLabel = document.createElement('label');
+            autoAnswerLabel.className = 'checkbox';
+            const autoAnswer = document.createElement('input');
+            autoAnswer.type = 'checkbox';
+            autoAnswerLabel.appendChild(autoAnswer);
+            autoAnswerLabel.appendChild(document.createTextNode('Auto-answer incoming calls (intercom mode)'));
+            formEl.appendChild(autoAnswerLabel);
+
+            const tlsLabel = document.createElement('label');
+            tlsLabel.className = 'checkbox';
+            const useTls = document.createElement('input');
+            useTls.type = 'checkbox';
+            tlsLabel.appendChild(useTls);
+            tlsLabel.appendChild(document.createTextNode('Use TLS encryption'));
+            formEl.appendChild(tlsLabel);
+
+            const submitBtn = document.createElement('button');
+            submitBtn.type = 'submit';
+            submitBtn.textContent = installed ? 'Reconfigure Asterisk Intercom' : 'Connect to Asterisk server';
+            formEl.appendChild(submitBtn);
+
+            addSubmitAction(formEl, jobPanelEls, 'configure_asterisk_intercom', () => ({
+                alreadyInstalled: installed, reconfigure: true,
+                serverIp: ip.value.trim(), serverPort: port.value ? parseInt(port.value, 10) : undefined,
+                extension: ext.value.trim(), password: pass.value,
+                autoAnswer: autoAnswer.checked, useTls: useTls.checked,
+            }), () => refreshAddonCard('asterisk_intercom'));
+        },
+    }));
+}
+
+/* ---------------------------------------------------------------------- */
+/* Update                                                                 */
+/* ---------------------------------------------------------------------- */
+
+document.getElementById('run-upgrade').addEventListener('click', async (e) => {
+    const btn = e.currentTarget;
+    btn.disabled = true;
+    try {
+        const result = await runAction('upgrade', {}, {
+            panel: document.getElementById('job-panel-upgrade'),
+            status: document.getElementById('job-status-upgrade'),
+            log: document.getElementById('job-log-upgrade'),
+        });
+        showMessage(result.status === 'success' ? 'Update finished' : 'Update failed - see the log below', result.status !== 'success');
+    } catch (err) {
+        showMessage(err.message, true);
+    } finally {
+        btn.disabled = false;
+    }
+});
+
+/* ---------------------------------------------------------------------- */
+/* Init                                                                    */
+/* ---------------------------------------------------------------------- */
+
+async function init() {
+    try {
+        currentConfig = await apiGet();
+        renderSites(currentConfig.tabs);
+        populateAll(currentConfig);
+    } catch (e) {
+        showMessage(e.message, true);
+    }
+    await loadAddonStatus();
+    renderAddons();
+}
+
+init();
@@ -0,0 +1,240 @@
+<!doctype html>
+<html lang="en">
+<head>
+<meta charset="utf-8">
+<meta name="viewport" content="width=device-width, initial-scale=1">
+<title>Kiosk Web UI</title>
+<link rel="stylesheet" href="style.css">
+</head>
+<body>
+<div class="shell">
+  <nav class="sidebar">
+    <div class="brand">
+      <div class="brand-mark">
+        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="4" width="18" height="13" rx="2"/><path d="M8 21h8M12 17v4"/></svg>
+      </div>
+      <div class="brand-text">
+        <strong>Kiosk Web UI</strong>
+        <span id="brand-sub">this kiosk</span>
+      </div>
+    </div>
+
+    <div class="nav">
+      <button class="nav-item active" data-page="sites">
+        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="3" y="3" width="18" height="18" rx="2"/><path d="M3 9h18M9 21V9"/></svg>
+        Sites &amp; Timing
+      </button>
+      <button class="nav-item" data-page="display">
+        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="2" y="4" width="20" height="14" rx="2"/><path d="M8 21h8M12 18v3"/></svg>
+        Display
+      </button>
+      <button class="nav-item" data-page="lockout">
+        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="4" y="10" width="16" height="10" rx="2"/><path d="M8 10V7a4 4 0 0 1 8 0v3"/></svg>
+        Lockout
+      </button>
+      <button class="nav-item" data-page="addons">
+        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M12 2 3 7l9 5 9-5-9-5Z"/><path d="m3 12 9 5 9-5M3 17l9 5 9-5"/></svg>
+        Addons
+      </button>
+      <button class="nav-item" data-page="update">
+        <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M21 12a9 9 0 1 1-2.6-6.4M21 4v5h-5"/></svg>
+        Update
+      </button>
+    </div>
+
+    <div class="sidebar-footer">No login of its own - front this with your own reverse proxy + Authelia if it needs to be reachable beyond a trusted LAN.</div>
+  </nav>
+
+  <main class="main">
+    <div id="msg" class="banner" hidden></div>
+
+    <!-- Sites & Page Timing -->
+    <section class="page active" id="page-sites">
+      <div class="page-header">
+        <h1>Sites &amp; Page Timing</h1>
+        <p>The pages this kiosk rotates through, and how long each stays on screen.</p>
+      </div>
+      <div class="card">
+        <div id="sites-list"></div>
+        <div class="button-row">
+          <button type="button" id="add-site" class="secondary">Add a page</button>
+          <button type="button" id="save-sites">Save Sites &amp; Page Timing</button>
+        </div>
+      </div>
+    </section>
+
+    <!-- Display & Interaction -->
+    <section class="page" id="page-display">
+      <div class="page-header">
+        <h1>Display &amp; Interaction</h1>
+        <p>Touch gestures, link navigation, on-screen buttons, and the home page.</p>
+      </div>
+      <div class="card">
+        <form id="display-form">
+          <label>
+            Touch gesture mode
+            <select name="swipeMode">
+              <option value="dual">Dual-direction (recommended for touchscreens)</option>
+              <option value="standard">Standard</option>
+            </select>
+          </label>
+
+          <label>
+            Link navigation security
+            <select name="allowNavigation">
+              <option value="restricted">Restricted - only the loaded URL</option>
+              <option value="same-origin">Same-origin - links within the same domain (recommended)</option>
+              <option value="open">Open - any link</option>
+            </select>
+          </label>
+
+          <label class="checkbox"><input type="checkbox" name="enablePauseButton"> Pause button</label>
+          <label class="checkbox"><input type="checkbox" name="enableKeyboardButton"> On-screen keyboard button</label>
+          <label class="checkbox"><input type="checkbox" name="enableNavButton"> Navigation/help button</label>
+
+          <fieldset>
+            <legend>Home page</legend>
+            <label>
+              Home page
+              <select name="homeTabIndex" id="home-tab-select">
+                <option value="-1">Disabled</option>
+              </select>
+            </label>
+            <label>
+              Inactivity timeout (minutes)
+              <input type="number" name="inactivityTimeoutMinutes" min="1" max="240" step="1">
+            </label>
+          </fieldset>
+
+          <div class="button-row"><button type="submit">Save Display &amp; Interaction</button></div>
+        </form>
+      </div>
+    </section>
+
+    <!-- Password Protection & Lockout -->
+    <section class="page" id="page-lockout">
+      <div class="page-header">
+        <h1>Password Protection &amp; Lockout</h1>
+        <p>Blank the screen after inactivity and require a password to unlock.</p>
+      </div>
+      <div class="card">
+        <form id="lockout-form">
+          <label class="checkbox"><input type="checkbox" name="enablePasswordProtection" id="lockout-enabled"> Enable password protection</label>
+
+          <div id="lockout-fields">
+            <label>
+              <span id="password-label">Set lockout password</span>
+              <input type="password" name="newLockoutPassword" autocomplete="new-password">
+            </label>
+            <label>
+              Confirm password
+              <input type="password" id="lockout-password-confirm" autocomplete="new-password">
+            </label>
+
+            <label>
+              Inactivity lockout timeout (minutes, 0 = boot/wake only)
+              <input type="number" name="lockoutTimeoutMinutes" min="0" max="1440" step="1">
+            </label>
+
+            <label class="checkbox"><input type="checkbox" id="daily-lock-enabled"> Lock at a specific time daily</label>
+            <label>
+              Daily lock time
+              <input type="time" name="lockoutAtTime" id="lockout-at-time" disabled>
+            </label>
+
+            <label class="checkbox"><input type="checkbox" name="requirePasswordOnBoot"> Require password on system boot</label>
+          </div>
+
+          <div class="button-row"><button type="submit">Save Password Protection &amp; Lockout</button></div>
+        </form>
+      </div>
+    </section>
+
+    <!-- Addons -->
+    <section class="page" id="page-addons">
+      <div class="page-header">
+        <h1>Addons</h1>
+        <p>Install and configure the same addons the terminal menu offers. Uninstall isn't available here yet.</p>
+      </div>
+      <div id="addons-list"></div>
+    </section>
+
+    <!-- Update -->
+    <section class="page" id="page-update">
+      <div class="page-header">
+        <h1>Update</h1>
+        <p>Pull the latest code from git and re-apply setup (packages, app files, hardware config).</p>
+      </div>
+      <div class="card">
+        <div class="button-row"><button type="button" id="run-upgrade">Check for and apply updates</button></div>
+        <div class="job-panel" id="job-panel-upgrade">
+          <div class="job-panel-header">
+            <span>Update</span>
+            <span class="job-status" id="job-status-upgrade"></span>
+          </div>
+          <pre class="job-log" id="job-log-upgrade"></pre>
+        </div>
+      </div>
+    </section>
+  </main>
+</div>
+
+<template id="site-row-template">
+  <div class="site-row card-inset">
+    <div class="site-row-grid">
+      <label>
+        URL
+        <input type="text" class="site-url" placeholder="example.com or https://example.com">
+      </label>
+      <label>
+        Name (optional)
+        <input type="text" class="site-name" placeholder="Shown instead of the URL">
+      </label>
+      <label>
+        Duration (seconds; -1=hidden, 0=manual, &gt;0=auto-rotate)
+        <input type="number" class="site-duration" min="-1" max="86400" step="1" value="180">
+      </label>
+    </div>
+    <details class="site-auth">
+      <summary>HTTP Basic Auth <span class="auth-state"></span></summary>
+      <label class="checkbox"><input type="checkbox" class="site-auth-enable"> Requires a username/password</label>
+      <label>
+        Username
+        <input type="text" class="site-auth-username">
+      </label>
+      <label>
+        New password <span class="hint">(leave blank to keep the current one)</span>
+        <input type="password" class="site-auth-password" autocomplete="new-password">
+      </label>
+    </details>
+    <button type="button" class="remove-site danger">Remove page</button>
+  </div>
+</template>
+
+<template id="addon-card-template">
+  <div class="card addon-card">
+    <div class="addon-card-top">
+      <div class="addon-title">
+        <div class="addon-icon"></div>
+        <div>
+          <div class="addon-name"></div>
+          <div class="addon-desc"></div>
+        </div>
+      </div>
+      <span class="pill unknown">checking&hellip;</span>
+    </div>
+    <div class="button-row addon-actions"></div>
+    <form class="addon-form"></form>
+    <div class="job-panel">
+      <div class="job-panel-header">
+        <span>Log</span>
+        <span class="job-status"></span>
+      </div>
+      <pre class="job-log"></pre>
+    </div>
+  </div>
+</template>
+
+<script src="app.js"></script>
+</body>
+</html>
@@ -0,0 +1,395 @@
+/* Design tokens - light by default, dark via prefers-color-scheme.
+   No external font/CDN dependency (self-hosted admin tool shouldn't
+   phone out to Google Fonts) - a well-tuned system-ui stack plus real
+   spacing/depth/motion is what actually reads as "modern", not the
+   typeface. */
+
+:root {
+  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", ui-sans-serif, Roboto, Helvetica, Arial, sans-serif;
+  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
+
+  --bg: #f5f6f8;
+  --bg-elevated: #ffffff;
+  --bg-sunken: #eef0f3;
+  --border: #e2e5ea;
+  --border-strong: #cbd0d8;
+  --text: #14161a;
+  --text-dim: #5c6370;
+  --text-faint: #8b929e;
+  --accent: #3b6ff0;
+  --accent-hover: #2f5cd6;
+  --accent-text: #ffffff;
+  --accent-soft: #e8effe;
+  --success: #1c8a5b;
+  --success-soft: #e3f6ec;
+  --warning: #a9660a;
+  --warning-soft: #fdf1de;
+  --danger: #d13a3a;
+  --danger-soft: #fbe8e8;
+  --shadow-sm: 0 1px 2px rgba(20, 22, 26, 0.06);
+  --shadow-md: 0 4px 16px rgba(20, 22, 26, 0.08);
+  --radius: 10px;
+  --radius-lg: 14px;
+  --sidebar-w: 232px;
+}
+
+@media (prefers-color-scheme: dark) {
+  :root {
+    --bg: #101216;
+    --bg-elevated: #17191f;
+    --bg-sunken: #0c0d10;
+    --border: #262a33;
+    --border-strong: #363c48;
+    --text: #eceef2;
+    --text-dim: #9aa1ad;
+    --text-faint: #6b7280;
+    --accent: #5b8cff;
+    --accent-hover: #7ba0ff;
+    --accent-text: #0a0e18;
+    --accent-soft: #17233f;
+    --success: #3ecf8e;
+    --success-soft: #103527;
+    --warning: #e2a53f;
+    --warning-soft: #3a2c11;
+    --danger: #f0605f;
+    --danger-soft: #3a1616;
+    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
+    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
+  }
+}
+
+* { box-sizing: border-box; }
+::selection { background: var(--accent-soft); }
+
+html, body {
+  height: 100%;
+}
+
+body {
+  margin: 0;
+  background: var(--bg);
+  color: var(--text);
+  font-family: var(--font);
+  font-size: 14.5px;
+  line-height: 1.55;
+  -webkit-font-smoothing: antialiased;
+}
+
+a { color: var(--accent); }
+
+/* ---------------------------------------------------------------- */
+/* Shell: fixed sidebar + main content                              */
+/* ---------------------------------------------------------------- */
+
+.shell {
+  display: flex;
+  min-height: 100vh;
+}
+
+.sidebar {
+  width: var(--sidebar-w);
+  flex-shrink: 0;
+  background: var(--bg-elevated);
+  border-right: 1px solid var(--border);
+  display: flex;
+  flex-direction: column;
+  padding: 20px 12px;
+  position: sticky;
+  top: 0;
+  height: 100vh;
+}
+
+.brand {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 4px 10px 22px;
+}
+
+.brand-mark {
+  width: 30px;
+  height: 30px;
+  border-radius: 8px;
+  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: var(--accent-text);
+  flex-shrink: 0;
+}
+.brand-mark svg { width: 17px; height: 17px; }
+
+.brand-text {
+  display: flex;
+  flex-direction: column;
+  line-height: 1.25;
+  min-width: 0;
+}
+.brand-text strong { font-size: 14px; }
+.brand-text span { font-size: 11.5px; color: var(--text-faint); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
+
+.nav { display: flex; flex-direction: column; gap: 2px; }
+
+.nav-item {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  padding: 9px 10px;
+  border-radius: 8px;
+  color: var(--text-dim);
+  font-size: 13.5px;
+  font-weight: 500;
+  cursor: pointer;
+  border: none;
+  background: transparent;
+  text-align: left;
+  width: 100%;
+}
+.nav-item svg { width: 17px; height: 17px; flex-shrink: 0; opacity: 0.85; }
+.nav-item:hover { background: var(--bg-sunken); color: var(--text); }
+.nav-item.active { background: var(--accent-soft); color: var(--accent); }
+.nav-item.active svg { opacity: 1; }
+
+.sidebar-footer {
+  margin-top: auto;
+  padding: 10px;
+  font-size: 11.5px;
+  color: var(--text-faint);
+  border-top: 1px solid var(--border);
+  padding-top: 14px;
+}
+
+.main {
+  flex: 1;
+  min-width: 0;
+  padding: 32px 40px 60px;
+  max-width: 880px;
+}
+
+.page { display: none; }
+.page.active { display: block; }
+
+.page-header { margin-bottom: 24px; }
+.page-header h1 { margin: 0 0 4px; font-size: 20px; letter-spacing: -0.01em; }
+.page-header p { margin: 0; color: var(--text-dim); font-size: 13.5px; }
+
+/* ---------------------------------------------------------------- */
+/* Cards, forms, buttons                                            */
+/* ---------------------------------------------------------------- */
+
+.card {
+  background: var(--bg-elevated);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-lg);
+  box-shadow: var(--shadow-sm);
+  padding: 20px 22px;
+  margin-bottom: 18px;
+}
+
+.card h2 { margin: 0 0 14px; font-size: 14.5px; font-weight: 600; }
+
+.card-inset {
+  background: var(--bg-sunken);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  padding: 14px 16px;
+  margin-bottom: 10px;
+}
+
+form { display: flex; flex-direction: column; gap: 14px; }
+
+label {
+  display: flex;
+  flex-direction: column;
+  gap: 5px;
+  font-size: 12.5px;
+  font-weight: 600;
+  color: var(--text-dim);
+}
+
+label.checkbox {
+  flex-direction: row;
+  align-items: center;
+  gap: 8px;
+  font-weight: 500;
+  color: var(--text);
+}
+label.checkbox input { width: 16px; height: 16px; accent-color: var(--accent); }
+
+.hint { color: var(--text-faint); font-size: 11.5px; font-weight: normal; }
+
+input[type="text"],
+input[type="password"],
+input[type="number"],
+input[type="time"],
+select {
+  background: var(--bg);
+  border: 1px solid var(--border-strong);
+  border-radius: 8px;
+  color: var(--text);
+  padding: 8px 10px;
+  font-size: 13.5px;
+  font-family: inherit;
+  transition: border-color 0.12s ease;
+}
+input:focus, select:focus {
+  outline: none;
+  border-color: var(--accent);
+  box-shadow: 0 0 0 3px var(--accent-soft);
+}
+
+fieldset {
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  padding: 14px 16px 16px;
+  display: flex;
+  flex-direction: column;
+  gap: 14px;
+  margin: 0;
+}
+legend { padding: 0 6px; color: var(--text-dim); font-size: 12px; font-weight: 600; }
+
+button {
+  border: none;
+  border-radius: 8px;
+  padding: 8px 15px;
+  font-size: 13px;
+  font-weight: 600;
+  font-family: inherit;
+  cursor: pointer;
+  background: var(--accent);
+  color: var(--accent-text);
+  align-self: flex-start;
+  transition: background-color 0.12s ease, transform 0.05s ease;
+}
+button:hover { background: var(--accent-hover); }
+button:active { transform: translateY(1px); }
+button:disabled { opacity: 0.55; cursor: not-allowed; }
+
+button.secondary {
+  background: transparent;
+  border: 1px solid var(--border-strong);
+  color: var(--text);
+}
+button.secondary:hover { background: var(--bg-sunken); }
+
+button.danger {
+  background: transparent;
+  border: 1px solid var(--danger);
+  color: var(--danger);
+}
+button.danger:hover { background: var(--danger-soft); }
+
+.button-row { display: flex; gap: 8px; margin-top: 4px; flex-wrap: wrap; }
+
+/* ---------------------------------------------------------------- */
+/* Addon cards, status pills, job log panel                         */
+/* ---------------------------------------------------------------- */
+
+.addon-card { display: flex; flex-direction: column; gap: 12px; }
+.addon-card-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
+.addon-title { display: flex; align-items: center; gap: 10px; }
+.addon-icon {
+  width: 34px; height: 34px; border-radius: 9px;
+  background: var(--bg-sunken); display: flex; align-items: center; justify-content: center;
+  color: var(--text-dim); flex-shrink: 0;
+}
+.addon-icon svg { width: 18px; height: 18px; }
+.addon-name { font-weight: 600; font-size: 14px; }
+.addon-desc { color: var(--text-faint); font-size: 12px; margin-top: 1px; }
+
+.pill {
+  display: inline-flex; align-items: center; gap: 5px;
+  padding: 3px 9px; border-radius: 999px;
+  font-size: 11px; font-weight: 700; letter-spacing: 0.02em; text-transform: uppercase;
+}
+.pill::before { content: ""; width: 6px; height: 6px; border-radius: 50%; }
+.pill.installed { background: var(--success-soft); color: var(--success); }
+.pill.installed::before { background: var(--success); }
+.pill.not-installed { background: var(--bg-sunken); color: var(--text-faint); }
+.pill.not-installed::before { background: var(--text-faint); }
+.pill.unknown { background: var(--warning-soft); color: var(--warning); }
+.pill.unknown::before { background: var(--warning); }
+
+.addon-form { display: none; }
+.addon-form.open { display: flex; padding-top: 4px; border-top: 1px solid var(--border); margin-top: 4px; }
+
+.job-panel {
+  display: none;
+  background: var(--bg-sunken);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  overflow: hidden;
+}
+.job-panel.open { display: block; }
+.job-panel-header {
+  display: flex; align-items: center; justify-content: space-between;
+  padding: 10px 14px; border-bottom: 1px solid var(--border);
+  font-size: 12.5px; font-weight: 600;
+}
+.job-status { display: flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.02em; }
+.job-status.running { color: var(--accent); }
+.job-status.success { color: var(--success); }
+.job-status.failed { color: var(--danger); }
+.spinner {
+  width: 12px; height: 12px; border-radius: 50%;
+  border: 2px solid var(--accent-soft); border-top-color: var(--accent);
+  animation: spin 0.7s linear infinite;
+}
+@keyframes spin { to { transform: rotate(360deg); } }
+
+.job-log {
+  margin: 0; padding: 12px 14px;
+  font-family: var(--font-mono); font-size: 12px; line-height: 1.6;
+  color: var(--text-dim);
+  max-height: 320px; overflow-y: auto;
+  white-space: pre-wrap; word-break: break-word;
+}
+
+/* ---------------------------------------------------------------- */
+/* Site rows (Sites & Page Timing)                                  */
+/* ---------------------------------------------------------------- */
+
+.site-row-grid {
+  display: grid;
+  grid-template-columns: 2fr 1fr 1fr;
+  gap: 12px;
+}
+@media (max-width: 640px) { .site-row-grid { grid-template-columns: 1fr; } }
+
+.site-auth {
+  margin-top: 10px;
+  border-top: 1px solid var(--border);
+  padding-top: 10px;
+}
+.site-auth summary { cursor: pointer; color: var(--text-dim); font-size: 12px; font-weight: 600; }
+.site-auth[open] summary { margin-bottom: 10px; }
+.auth-state { color: var(--text-faint); font-weight: normal; }
+
+/* ---------------------------------------------------------------- */
+/* Toast banner                                                     */
+/* ---------------------------------------------------------------- */
+
+.banner {
+  border-radius: var(--radius);
+  padding: 11px 15px;
+  font-size: 13px;
+  font-weight: 500;
+  position: fixed;
+  top: 18px;
+  right: 18px;
+  max-width: 360px;
+  box-shadow: var(--shadow-md);
+  z-index: 50;
+}
+.banner.success { background: var(--success-soft); border: 1px solid var(--success); color: var(--success); }
+.banner.error { background: var(--danger-soft); border: 1px solid var(--danger); color: var(--danger); }
+
+@media (max-width: 800px) {
+  .shell { flex-direction: column; }
+  .sidebar { width: 100%; height: auto; position: static; flex-direction: row; align-items: center; padding: 12px; overflow-x: auto; }
+  .brand { padding: 0 10px 0 0; }
+  .nav { flex-direction: row; }
+  .sidebar-footer { display: none; }
+  .main { padding: 20px; }
+}
@@ -0,0 +1,222 @@
+'use strict';
+
+// webui/server.js - Kiosk Web UI: browser-based config editor for Sites &
+// Page Timing, Display & Interaction, and Password Protection & Lockout -
+// the three Core Settings menus that are pure config.json read/write with
+// no privileged system mutation involved (see menus/addon_webui.sh's
+// header for why the rest of Core Settings/Addons/Advanced aren't here).
+//
+// No login of its own by design: Authelia runs elsewhere, and the admin
+// site goes behind the user's own Caddy reverse proxy with Authelia
+// forward-auth in front of it, the same way every other self-hosted app
+// they run is protected. This process only binds where it's told to
+// (BIND_ADDR/PORT below) and trusts whatever's in front of it.
+//
+// Runs as $KIOSK_USER (see the systemd unit menus/addon_webui.sh
+// installs) - the same user Electron runs as, and the owner of
+// config.json - so it never needs sudo.
+
+const path = require('path');
+const { execFile } = require('child_process');
+const express = require('express');
+const { loadConfig, saveConfig } = require('./lib/config');
+const { ACTIONS } = require('./lib/actions');
+const { startJob, getJob } = require('./lib/jobs');
+
+const HELPER_PATH = process.env.HELPER_PATH || '/usr/local/bin/kiosk-webui-helper';
+const SUDO_CMD = process.env.SUDO_CMD !== undefined ? process.env.SUDO_CMD : 'sudo';
+
+const app = express();
+app.use(express.json({ limit: '256kb' }));
+app.use(express.static(path.join(__dirname, 'public')));
+
+const SWIPE_MODES = ['dual', 'standard'];
+const NAV_MODES = ['restricted', 'same-origin', 'open'];
+const TIME_RE = /^([01]\d|2[0-3]):[0-5]\d$/;
+
+// Same normalization rule as menus/sites.sh's sites_parse_url(): bare
+// host -> https://, bare IPv4 -> http://, else passed through as-is.
+function parseUrl(raw) {
+    if (/^https?:\/\//.test(raw)) return raw;
+    if (/^\d+\.\d+\.\d+\.\d+/.test(raw)) return `http://${raw}`;
+    return `https://${raw}`;
+}
+
+function badRequest(res, message) {
+    res.status(400).json({ error: message });
+}
+
+app.get('/api/config', (req, res) => {
+    res.json(loadConfig());
+});
+
+app.put('/api/config', (req, res) => {
+    const body = req.body && typeof req.body === 'object' ? req.body : {};
+    const patch = {};
+
+    if (body.swipeMode !== undefined) {
+        if (!SWIPE_MODES.includes(body.swipeMode)) return badRequest(res, 'swipeMode must be "dual" or "standard"');
+        patch.swipeMode = body.swipeMode;
+    }
+    if (body.allowNavigation !== undefined) {
+        if (!NAV_MODES.includes(body.allowNavigation)) {
+            return badRequest(res, 'allowNavigation must be "restricted", "same-origin", or "open"');
+        }
+        patch.allowNavigation = body.allowNavigation;
+    }
+    if (body.enablePauseButton !== undefined) patch.enablePauseButton = !!body.enablePauseButton;
+    if (body.enableKeyboardButton !== undefined) patch.enableKeyboardButton = !!body.enableKeyboardButton;
+    if (body.enableNavButton !== undefined) patch.enableNavButton = !!body.enableNavButton;
+
+    let tabCount;
+    if (body.tabs !== undefined) {
+        if (!Array.isArray(body.tabs)) return badRequest(res, 'tabs must be an array');
+        for (const t of body.tabs) {
+            if (!t || typeof t.url !== 'string' || t.url.trim() === '') return badRequest(res, 'Every site needs a URL');
+            const dur = Number(t.duration);
+            if (!Number.isInteger(dur) || dur < -1 || dur > 86400) {
+                return badRequest(res, 'Duration must be a whole number between -1 and 86400');
+            }
+        }
+        patch.tabs = body.tabs.map((t) => ({ ...t, url: parseUrl(t.url.trim()) }));
+        tabCount = patch.tabs.length;
+    }
+
+    if (body.homeTabIndex !== undefined) {
+        const idx = Number(body.homeTabIndex);
+        const count = tabCount !== undefined ? tabCount : loadConfig().tabs.length;
+        if (!Number.isInteger(idx) || idx < -1 || idx >= count) return badRequest(res, 'homeTabIndex is out of range');
+        patch.homeTabIndex = idx;
+    }
+
+    if (body.inactivityTimeoutMinutes !== undefined) {
+        const min = Number(body.inactivityTimeoutMinutes);
+        if (!Number.isInteger(min) || min < 1 || min > 240) return badRequest(res, 'Inactivity timeout must be 1-240 minutes');
+        patch.inactivityTimeout = min * 60;
+    }
+
+    if (body.enablePasswordProtection !== undefined) patch.enablePasswordProtection = !!body.enablePasswordProtection;
+
+    if (body.lockoutTimeoutMinutes !== undefined) {
+        const min = Number(body.lockoutTimeoutMinutes);
+        if (!Number.isInteger(min) || min < 0 || min > 1440) return badRequest(res, 'Lockout timeout must be 0-1440 minutes');
+        patch.lockoutTimeout = min;
+    }
+
+    if (body.lockoutAtTime !== undefined) {
+        if (body.lockoutAtTime !== '' && !TIME_RE.test(body.lockoutAtTime)) {
+            return badRequest(res, 'lockoutAtTime must be HH:MM (24-hour) or empty');
+        }
+        patch.lockoutAtTime = body.lockoutAtTime;
+    }
+
+    if (body.requirePasswordOnBoot !== undefined) patch.requirePasswordOnBoot = !!body.requirePasswordOnBoot;
+
+    if (body.newLockoutPassword !== undefined) {
+        if (typeof body.newLockoutPassword !== 'string' || body.newLockoutPassword.length === 0) {
+            return badRequest(res, 'Password cannot be empty');
+        }
+        patch.newLockoutPassword = body.newLockoutPassword;
+    }
+
+    // Mirrors action_enable_protection() always requiring a password up
+    // front - lockout.sh has no path that enables protection without one.
+    if (patch.enablePasswordProtection === true) {
+        const hasNewPassword = typeof patch.newLockoutPassword === 'string' && patch.newLockoutPassword.length > 0;
+        if (!hasNewPassword && !loadConfig().hasLockoutPassword) {
+            return badRequest(res, 'Set a lockout password before enabling password protection');
+        }
+    }
+
+    try {
+        res.json(saveConfig(patch));
+    } catch (e) {
+        console.error('saveConfig failed:', e);
+        res.status(500).json({ error: 'Failed to save configuration' });
+    }
+});
+
+/* ---------------------------------------------------------------------- */
+/* Addons: install/reconfigure via the allow-listed root helper           */
+/* ---------------------------------------------------------------------- */
+
+app.get('/api/actions', (req, res) => {
+    const list = Object.entries(ACTIONS).map(([name, a]) => ({ name, label: a.label, fields: a.fields }));
+    res.json(list);
+});
+
+app.get('/api/addons/status', (req, res) => {
+    const cmd = SUDO_CMD || HELPER_PATH;
+    const args = SUDO_CMD ? [HELPER_PATH, 'status_all'] : ['status_all'];
+    execFile(cmd, args, { timeout: 10_000 }, (err, stdout, stderr) => {
+        if (err) {
+            console.error('status_all failed:', stderr || err.message);
+            return res.status(500).json({ error: 'Could not read addon status' });
+        }
+        try {
+            res.json(JSON.parse(stdout.trim()));
+        } catch (e) {
+            res.status(500).json({ error: 'Malformed status response' });
+        }
+    });
+});
+
+app.post('/api/actions/:name/run', (req, res) => {
+    try {
+        const job = startJob(req.params.name, req.body || {});
+        res.json({ jobId: job.id, status: job.status, label: job.label });
+    } catch (e) {
+        res.status(e.status || 500).json({ error: e.message });
+    }
+});
+
+app.get('/api/actions/jobs/:jobId', (req, res) => {
+    const job = getJob(req.params.jobId);
+    if (!job) return res.status(404).json({ error: 'Unknown job' });
+    res.json({ id: job.id, name: job.name, label: job.label, status: job.status, exitCode: job.exitCode, log: job.log.join('') });
+});
+
+// Server-Sent Events: replays whatever's already logged, then streams
+// new lines as they arrive, then a final `done` event - works whether
+// the client connects before the job starts producing output or
+// reconnects partway through (e.g. after a page reload).
+app.get('/api/actions/jobs/:jobId/stream', (req, res) => {
+    const job = getJob(req.params.jobId);
+    if (!job) return res.status(404).end();
+
+    res.writeHead(200, {
+        'Content-Type': 'text/event-stream',
+        'Cache-Control': 'no-cache',
+        Connection: 'keep-alive',
+    });
+
+    if (job.log.length) {
+        res.write(`event: log\ndata: ${JSON.stringify(job.log.join(''))}\n\n`);
+    }
+    if (job.status !== 'running') {
+        res.write(`event: done\ndata: ${JSON.stringify({ status: job.status, exitCode: job.exitCode })}\n\n`);
+        return res.end();
+    }
+
+    const listener = (text) => {
+        if (text === null) {
+            res.write(`event: done\ndata: ${JSON.stringify({ status: job.status, exitCode: job.exitCode })}\n\n`);
+            res.end();
+        } else {
+            res.write(`event: log\ndata: ${JSON.stringify(text)}\n\n`);
+        }
+    };
+    job.listeners.add(listener);
+    req.on('close', () => job.listeners.delete(listener));
+});
+
+const PORT = process.env.PORT || 8090;
+const BIND_ADDR = process.env.BIND_ADDR || '0.0.0.0';
+
+if (require.main === module) {
+    app.listen(PORT, BIND_ADDR, () => {
+        console.log(`Kiosk Web UI listening on ${BIND_ADDR}:${PORT}`);
+    });
+}
+
+module.exports = app;
@@ -0,0 +1,170 @@
+'use strict';
+
+// webui/test/api.test.js - integration test: starts the real server.js
+// app on a random port against a scratch config.json and hits GET/PUT
+// /api/config with real HTTP requests (Node's built-in fetch). Run with:
+// node test/api.test.js
+
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
+const assert = require('assert');
+
+const scratchDir = fs.mkdtempSync(path.join(os.tmpdir(), 'webui-api-test-'));
+process.env.CONFIG_PATH = path.join(scratchDir, 'config.json');
+
+const app = require('../server');
+
+let failures = 0;
+async function check(label, fn) {
+    try {
+        await fn();
+        console.log(`PASS: ${label}`);
+    } catch (e) {
+        failures++;
+        console.log(`FAIL: ${label} - ${e.message}`);
+    }
+}
+
+async function main() {
+    const server = app.listen(0, '127.0.0.1');
+    await new Promise((resolve) => server.once('listening', resolve));
+    const port = server.address().port;
+    const base = `http://127.0.0.1:${port}`;
+
+    await check('GET /api/config returns defaults on a fresh install', async () => {
+        const res = await fetch(`${base}/api/config`);
+        assert.strictEqual(res.status, 200);
+        const body = await res.json();
+        assert.deepStrictEqual(body.tabs, []);
+        assert.strictEqual(body.swipeMode, 'dual');
+    });
+
+    await check('PUT /api/config saves and round-trips display settings', async () => {
+        const res = await fetch(`${base}/api/config`, {
+            method: 'PUT',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ swipeMode: 'standard', allowNavigation: 'restricted', enableNavButton: false }),
+        });
+        assert.strictEqual(res.status, 200);
+        const body = await res.json();
+        assert.strictEqual(body.swipeMode, 'standard');
+        assert.strictEqual(body.allowNavigation, 'restricted');
+        assert.strictEqual(body.enableNavButton, false);
+    });
+
+    await check('PUT rejects an invalid allowNavigation value', async () => {
+        const res = await fetch(`${base}/api/config`, {
+            method: 'PUT',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ allowNavigation: 'wide-open' }),
+        });
+        assert.strictEqual(res.status, 400);
+    });
+
+    await check('PUT rejects a duration out of range', async () => {
+        const res = await fetch(`${base}/api/config`, {
+            method: 'PUT',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ tabs: [{ url: 'example.com', duration: 999999 }] }),
+        });
+        assert.strictEqual(res.status, 400);
+    });
+
+    await check('PUT normalizes bare hostnames/IPs the same way sites_parse_url does', async () => {
+        const res = await fetch(`${base}/api/config`, {
+            method: 'PUT',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({
+                tabs: [
+                    { url: 'example.com', duration: 30, name: 'bare host' },
+                    { url: '192.168.1.50', duration: 30, name: 'bare ip' },
+                    { url: 'https://already.example.com', duration: 30, name: 'already a url' },
+                ],
+            }),
+        });
+        assert.strictEqual(res.status, 200);
+        const body = await res.json();
+        assert.strictEqual(body.tabs[0].url, 'https://example.com');
+        assert.strictEqual(body.tabs[1].url, 'http://192.168.1.50');
+        assert.strictEqual(body.tabs[2].url, 'https://already.example.com');
+    });
+
+    await check('PUT rejects homeTabIndex out of range', async () => {
+        const res = await fetch(`${base}/api/config`, {
+            method: 'PUT',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ homeTabIndex: 99 }),
+        });
+        assert.strictEqual(res.status, 400);
+    });
+
+    await check('PUT accepts a valid homeTabIndex and converts inactivity minutes to stored seconds', async () => {
+        const res = await fetch(`${base}/api/config`, {
+            method: 'PUT',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ homeTabIndex: 1, inactivityTimeoutMinutes: 5 }),
+        });
+        assert.strictEqual(res.status, 200);
+        const body = await res.json();
+        assert.strictEqual(body.homeTabIndex, 1);
+        assert.strictEqual(body.inactivityTimeout, 300);
+
+        const onDisk = JSON.parse(fs.readFileSync(process.env.CONFIG_PATH, 'utf8'));
+        assert.strictEqual(onDisk.inactivityTimeout, 300);
+    });
+
+    await check('PUT rejects enabling password protection with no password set', async () => {
+        const res = await fetch(`${base}/api/config`, {
+            method: 'PUT',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ enablePasswordProtection: true }),
+        });
+        assert.strictEqual(res.status, 400);
+    });
+
+    await check('PUT enables password protection when a new password is supplied, and never echoes it back', async () => {
+        const res = await fetch(`${base}/api/config`, {
+            method: 'PUT',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ enablePasswordProtection: true, newLockoutPassword: 'hunter2', lockoutTimeoutMinutes: 15 }),
+        });
+        assert.strictEqual(res.status, 200);
+        const body = await res.json();
+        assert.strictEqual(body.enablePasswordProtection, true);
+        assert.strictEqual(body.hasLockoutPassword, true);
+        assert.strictEqual(body.lockoutPassword, undefined);
+        assert.strictEqual(JSON.stringify(body).includes('hunter2'), false);
+    });
+
+    await check('PUT rejects a malformed lockoutAtTime', async () => {
+        const res = await fetch(`${base}/api/config`, {
+            method: 'PUT',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ lockoutAtTime: '25:99' }),
+        });
+        assert.strictEqual(res.status, 400);
+    });
+
+    await check('PUT re-enabling protection without a new password succeeds once one is already set', async () => {
+        const res = await fetch(`${base}/api/config`, {
+            method: 'PUT',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ enablePasswordProtection: true, lockoutTimeoutMinutes: 20 }),
+        });
+        assert.strictEqual(res.status, 200);
+        const body = await res.json();
+        assert.strictEqual(body.lockoutTimeout, 20);
+    });
+
+    server.close();
+    fs.rmSync(scratchDir, { recursive: true, force: true });
+
+    if (failures > 0) {
+        console.log(`${failures} FAILURE(S)`);
+        process.exit(1);
+    }
+    console.log('ALL DONE');
+}
+
+main();
@@ -0,0 +1,137 @@
+'use strict';
+
+// webui/test/config.test.js - unit tests for lib/config.js against a
+// scratch config.json. Run with: node test/config.test.js
+//
+// Mirrors this project's bash test convention (PASS/FAIL lines, ALL DONE
+// at the end) rather than pulling in a test framework dependency.
+
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
+const assert = require('assert');
+
+const scratchDir = fs.mkdtempSync(path.join(os.tmpdir(), 'webui-config-test-'));
+process.env.CONFIG_PATH = path.join(scratchDir, 'config.json');
+
+const { loadConfig, saveConfig } = require('../lib/config');
+
+let failures = 0;
+function check(label, fn) {
+    try {
+        fn();
+        console.log(`PASS: ${label}`);
+    } catch (e) {
+        failures++;
+        console.log(`FAIL: ${label} - ${e.message}`);
+    }
+}
+
+check('loadConfig on a missing file returns documented defaults', () => {
+    const cfg = loadConfig();
+    assert.deepStrictEqual(cfg.tabs, []);
+    assert.strictEqual(cfg.swipeMode, 'dual');
+    assert.strictEqual(cfg.allowNavigation, 'same-origin');
+    assert.strictEqual(cfg.homeTabIndex, -1);
+    assert.strictEqual(cfg.inactivityTimeout, 120);
+    assert.strictEqual(cfg.enablePasswordProtection, false);
+    assert.strictEqual(cfg.hasLockoutPassword, false);
+    assert.strictEqual(cfg.dualSwipe, true);
+});
+
+check('saveConfig creates the file and round-trips scalar fields', () => {
+    const result = saveConfig({ swipeMode: 'standard', allowNavigation: 'open', enablePauseButton: false });
+    assert.strictEqual(result.swipeMode, 'standard');
+    assert.strictEqual(result.allowNavigation, 'open');
+    assert.strictEqual(result.enablePauseButton, false);
+    assert.strictEqual(result.dualSwipe, false);
+
+    const onDisk = JSON.parse(fs.readFileSync(process.env.CONFIG_PATH, 'utf8'));
+    assert.strictEqual(onDisk.swipeMode, 'standard');
+    assert.strictEqual(onDisk.autoswitch, true);
+    assert.strictEqual(onDisk.enableTouch, true);
+});
+
+check('saveConfig merge preserves fields this app never tracks (the previously-fixed clobber bug)', () => {
+    // Simulate a file with Authelia + quiet-hours fields already set, the
+    // way the terminal addon/menus would have written them - config.js
+    // must never know these exist and must never delete them.
+    const existing = JSON.parse(fs.readFileSync(process.env.CONFIG_PATH, 'utf8'));
+    existing.autheliaURL = 'https://auth.example.com';
+    existing.autheliaUsername = 'kiosk';
+    existing.autheliaEncryptedPassword = 'deadbeef';
+    existing.lockoutActiveStart = '22:00';
+    existing.lockoutActiveEnd = '06:00';
+    fs.writeFileSync(process.env.CONFIG_PATH, JSON.stringify(existing));
+
+    saveConfig({ enableNavButton: false });
+
+    const onDisk = JSON.parse(fs.readFileSync(process.env.CONFIG_PATH, 'utf8'));
+    assert.strictEqual(onDisk.autheliaURL, 'https://auth.example.com');
+    assert.strictEqual(onDisk.autheliaUsername, 'kiosk');
+    assert.strictEqual(onDisk.autheliaEncryptedPassword, 'deadbeef');
+    assert.strictEqual(onDisk.lockoutActiveStart, '22:00');
+    assert.strictEqual(onDisk.lockoutActiveEnd, '06:00');
+    assert.strictEqual(onDisk.enableNavButton, false);
+});
+
+check('saveConfig tabs: new password gets hashed, never stored/returned as plaintext', () => {
+    const result = saveConfig({
+        tabs: [{ url: 'https://a.example.com', duration: 30, name: 'A', username: 'bob', password: 'hunter2' }],
+    });
+    assert.strictEqual(result.tabs[0].hasPassword, true);
+    assert.strictEqual(result.tabs[0].username, 'bob');
+    assert.strictEqual(result.tabs[0].password, undefined);
+
+    const onDisk = JSON.parse(fs.readFileSync(process.env.CONFIG_PATH, 'utf8'));
+    assert.strictEqual(onDisk.tabs[0].password, 'hunter2'); // stored plaintext by design, matches lib/config.sh's own PASSES/USERS handling for Basic Auth (not the lockout password)
+});
+
+check('saveConfig tabs: omitting password on an existing tab keeps the stored one (positional identity)', () => {
+    saveConfig({
+        tabs: [{ url: 'https://a.example.com', duration: 45, name: 'A renamed', username: 'bob' }],
+    });
+    const onDisk = JSON.parse(fs.readFileSync(process.env.CONFIG_PATH, 'utf8'));
+    assert.strictEqual(onDisk.tabs[0].password, 'hunter2');
+    assert.strictEqual(onDisk.tabs[0].duration, 45);
+    assert.strictEqual(onDisk.tabs[0].name, 'A renamed');
+});
+
+check('saveConfig lockout password is SHA-256 hashed, matching lockout.sh/main.js', () => {
+    const crypto = require('crypto');
+    saveConfig({ enablePasswordProtection: true, newLockoutPassword: 'correcthorse' });
+    const onDisk = JSON.parse(fs.readFileSync(process.env.CONFIG_PATH, 'utf8'));
+    const expected = crypto.createHash('sha256').update('correcthorse', 'utf8').digest('hex');
+    assert.strictEqual(onDisk.lockoutPassword, expected);
+
+    const result = loadConfig();
+    assert.strictEqual(result.hasLockoutPassword, true);
+    assert.strictEqual(result.lockoutPassword, undefined);
+});
+
+check('saveConfig disabling password protection clears the whole lockout state (matches action_disable_protection)', () => {
+    saveConfig({ enablePasswordProtection: true, newLockoutPassword: 'x', lockoutTimeout: 30 });
+    const before = loadConfig();
+    assert.strictEqual(before.hasLockoutPassword, true);
+
+    saveConfig({ enablePasswordProtection: false });
+    const onDisk = JSON.parse(fs.readFileSync(process.env.CONFIG_PATH, 'utf8'));
+    assert.strictEqual(onDisk.lockoutPassword, '');
+    assert.strictEqual(onDisk.lockoutTimeout, 0);
+    assert.strictEqual(onDisk.lockoutAtTime, '');
+    assert.strictEqual(onDisk.requirePasswordOnBoot, false);
+});
+
+check('saveConfig with invalid JSON already on disk falls back to {} rather than crashing', () => {
+    fs.writeFileSync(process.env.CONFIG_PATH, '{not valid json');
+    const result = saveConfig({ swipeMode: 'dual' });
+    assert.strictEqual(result.swipeMode, 'dual');
+});
+
+fs.rmSync(scratchDir, { recursive: true, force: true });
+
+if (failures > 0) {
+    console.log(`${failures} FAILURE(S)`);
+    process.exit(1);
+}
+console.log('ALL DONE');
@@ -0,0 +1,30 @@
+#!/bin/bash
+# Variant of fake-helper.sh that also implements status_all with real,
+# minimally stateful JSON (tracked via marker files alongside itself),
+# for browser/manual smoke testing of the Addons page's pills/buttons
+# actually flipping after a real install - not just that a job reports
+# success. jobs.test.js intentionally uses the plainer fake-helper.sh
+# instead, to exercise the malformed-status-response error path.
+STATE_DIR="$(dirname "$0")/.fake-state"
+mkdir -p "$STATE_DIR"
+
+if [[ "$1" == "status_all" ]]; then
+    state() { [[ -f "$STATE_DIR/$1" ]] && echo true || echo false; }
+    echo "{\"cups\":$(state cups),\"lms\":$(state lms),\"squeezelite\":$(state squeezelite),\"asterisk_intercom\":$(state asterisk_intercom)}"
+    exit 0
+fi
+
+echo "fake-helper: action=$1"
+stdin_content=$(cat)
+echo "fake-helper: stdin-bytes=${#stdin_content}"
+sleep 0.3
+
+case "$1" in
+    action_install_cups | action_reconfigure_cups) touch "$STATE_DIR/cups" ;;
+    action_install_lms) touch "$STATE_DIR/lms" ;;
+    action_install_squeezelite) touch "$STATE_DIR/squeezelite" ;;
+    action_configure_asterisk_intercom) touch "$STATE_DIR/asterisk_intercom" ;;
+esac
+
+echo "fake-helper: done"
+exit "${FAKE_HELPER_EXIT_CODE:-0}"
@@ -0,0 +1,13 @@
+#!/bin/bash
+# webui/test/fixtures/fake-helper.sh - stands in for the real, root-owned
+# kiosk-webui-helper (menus/addon_webui.sh) in webui/test/jobs.test.js,
+# so the job/SSE system can be tested without real root or a real addon
+# install. Echoes what it received, sleeps briefly (long enough for the
+# "another job is already running" test to reliably observe it), then
+# exits with a controllable code.
+echo "fake-helper: action=$1"
+stdin_content=$(cat)
+echo "fake-helper: stdin-bytes=${#stdin_content}"
+sleep 0.2
+echo "fake-helper: done"
+exit "${FAKE_HELPER_EXIT_CODE:-0}"
@@ -0,0 +1,190 @@
+'use strict';
+
+// webui/test/jobs.test.js - integration test for the addon-install job
+// system (/api/actions/*, /api/addons/status) against a fake helper
+// script (test/fixtures/fake-helper.sh) instead of the real, root-owned
+// kiosk-webui-helper - no real root, apt, or system mutation involved,
+// matching this project's rule of never touching real system state in
+// tests. Run with: node test/jobs.test.js
+
+const fs = require('fs');
+const os = require('os');
+const path = require('path');
+const assert = require('assert');
+
+const scratchDir = fs.mkdtempSync(path.join(os.tmpdir(), 'webui-jobs-test-'));
+process.env.CONFIG_PATH = path.join(scratchDir, 'config.json');
+process.env.HELPER_PATH = path.join(__dirname, 'fixtures', 'fake-helper.sh');
+process.env.SUDO_CMD = ''; // run the fake helper directly, no real sudo
+
+const app = require('../server');
+
+let failures = 0;
+async function check(label, fn) {
+    try {
+        await fn();
+        console.log(`PASS: ${label}`);
+    } catch (e) {
+        failures++;
+        console.log(`FAIL: ${label} - ${e.message}`);
+    }
+}
+
+function sleep(ms) {
+    return new Promise((resolve) => setTimeout(resolve, ms));
+}
+
+async function waitForDone(base, jobId, timeoutMs = 3000) {
+    const start = Date.now();
+    while (Date.now() - start < timeoutMs) {
+        const res = await fetch(`${base}/api/actions/jobs/${jobId}`);
+        const body = await res.json();
+        if (body.status !== 'running') return body;
+        await sleep(20);
+    }
+    throw new Error('timed out waiting for job to finish');
+}
+
+async function main() {
+    const server = app.listen(0, '127.0.0.1');
+    await new Promise((resolve) => server.once('listening', resolve));
+    const port = server.address().port;
+    const base = `http://127.0.0.1:${port}`;
+
+    await check('GET /api/actions lists the allow-listed actions with their fields', async () => {
+        const res = await fetch(`${base}/api/actions`);
+        assert.strictEqual(res.status, 200);
+        const body = await res.json();
+        const names = body.map((a) => a.name);
+        assert.ok(names.includes('install_cups'));
+        assert.ok(names.includes('configure_asterisk_intercom'));
+        const asterisk = body.find((a) => a.name === 'configure_asterisk_intercom');
+        assert.ok(asterisk.fields.includes('serverIp'));
+    });
+
+    await check('GET /api/addons/status returns the fake helper\'s status_all JSON', async () => {
+        // fake-helper.sh doesn't implement status_all specially - it just
+        // echoes/exits 0 with non-JSON text, so this exercises the
+        // malformed-response error path rather than a real status shape.
+        const res = await fetch(`${base}/api/addons/status`);
+        assert.strictEqual(res.status, 500);
+    });
+
+    let jobId;
+    await check('POST /api/actions/install_cups/run starts a job and returns its id', async () => {
+        const res = await fetch(`${base}/api/actions/install_cups/run`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({}),
+        });
+        assert.strictEqual(res.status, 200);
+        const body = await res.json();
+        assert.ok(body.jobId);
+        assert.strictEqual(body.status, 'running');
+        jobId = body.jobId;
+    });
+
+    await check('a second action while one is running is rejected with 409', async () => {
+        const res = await fetch(`${base}/api/actions/reconfigure_cups/run`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({}),
+        });
+        assert.strictEqual(res.status, 409);
+    });
+
+    await check('the job completes successfully and the log shows what the helper received', async () => {
+        const body = await waitForDone(base, jobId);
+        assert.strictEqual(body.status, 'success');
+        assert.strictEqual(body.exitCode, 0);
+        assert.ok(body.log.includes('fake-helper: action=action_install_cups'), body.log);
+        assert.ok(body.log.includes('fake-helper: stdin-bytes='), body.log);
+        assert.ok(body.log.includes('fake-helper: done'), body.log);
+    });
+
+    await check('after completion, a new action is accepted again (not stuck busy)', async () => {
+        const res = await fetch(`${base}/api/actions/reconfigure_cups/run`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({}),
+        });
+        assert.strictEqual(res.status, 200);
+        const body = await res.json();
+        await waitForDone(base, body.jobId);
+    });
+
+    await check('unknown action name is rejected with 400, no job created', async () => {
+        const res = await fetch(`${base}/api/actions/definitely_not_real/run`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({}),
+        });
+        assert.strictEqual(res.status, 400);
+    });
+
+    await check('missing required field is rejected with 400 before spawning anything', async () => {
+        const res = await fetch(`${base}/api/actions/configure_asterisk_intercom/run`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ alreadyInstalled: false, extension: '201', password: 'x' }),
+        });
+        assert.strictEqual(res.status, 400);
+        const body = await res.json();
+        assert.ok(/serverIp/.test(body.error), body.error);
+    });
+
+    await check('a failing helper is reflected as status failed with the real exit code', async () => {
+        process.env.FAKE_HELPER_EXIT_CODE = '1';
+        // jobs.js reads process.env.HELPER_PATH/SUDO_CMD once at module
+        // load, but FAKE_HELPER_EXIT_CODE is read fresh by the spawned
+        // shell script every time, so no re-require needed here.
+        const res = await fetch(`${base}/api/actions/reconfigure_cups/run`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({}),
+        });
+        const { jobId: failId } = await res.json();
+        const body = await waitForDone(base, failId);
+        assert.strictEqual(body.status, 'failed');
+        assert.strictEqual(body.exitCode, 1);
+        delete process.env.FAKE_HELPER_EXIT_CODE;
+    });
+
+    await check('GET /api/actions/jobs/:id/stream (SSE) replays the log and sends a final done event', async () => {
+        const res = await fetch(`${base}/api/actions/install_lms/run`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+            body: JSON.stringify({ alreadyInstalled: false }),
+        });
+        const { jobId: streamJobId } = await res.json();
+
+        const streamRes = await fetch(`${base}/api/actions/jobs/${streamJobId}/stream`);
+        assert.strictEqual(streamRes.status, 200);
+        assert.strictEqual(streamRes.headers.get('content-type'), 'text/event-stream');
+
+        const reader = streamRes.body.getReader();
+        const decoder = new TextDecoder();
+        let raw = '';
+        const deadline = Date.now() + 3000;
+        while (!raw.includes('event: done') && Date.now() < deadline) {
+            const { value, done } = await reader.read();
+            if (done) break;
+            raw += decoder.decode(value, { stream: true });
+        }
+        assert.ok(raw.includes('event: log'), raw);
+        assert.ok(raw.includes('fake-helper: action=action_install_lms'), raw);
+        assert.ok(raw.includes('event: done'), raw);
+        assert.ok(/data: \{"status":"success","exitCode":0\}/.test(raw), raw);
+    });
+
+    server.close();
+    fs.rmSync(scratchDir, { recursive: true, force: true });
+
+    if (failures > 0) {
+        console.log(`${failures} FAILURE(S)`);
+        process.exit(1);
+    }
+    console.log('ALL DONE');
+}
+
+main();