Back/forward buttons: adjustable opacity; Upgrade refreshes the Web UI copy

New historyButtonsOpacity setting (10-100 percent, default 50) in the
terminal menu (Display & Interaction) and the Web UI. Upgrade now also
copies the Web UI app to /opt/kiosk-webui and restarts it, so new Web UI
settings appear after an upgrade (it previously kept its old copy).

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013wi3ZQveYdjfcrEsyazq32

menus/advanced_upgrade.sh

@@ -121,6 +121,18 @@ action_upgrade() {
             provision_configure_display
             provision_configure_firewall
             provision_configure_power_management
+
+            # The Web UI runs from its own copy (/opt/kiosk-webui), not from
+            # this checkout - refresh it too, or new settings never show up
+            # there. Port, service and sudo rules are left as they are.
+            if [[ -f "$SYSTEMD_DIR/kiosk-webui.service" ]]; then
+                log_info "Refreshing the Web UI..."
+                if webui_install_app_files; then
+                    sudo systemctl restart kiosk-webui || log_warning "Web UI copied but did not restart - run: sudo systemctl restart kiosk-webui"
+                else
+                    log_warning "Couldn't refresh the Web UI - the Web UI keeps its old version"
+                fi
+            fi
             log_success "Setup refreshed"
 
             echo

menus/display.sh

@@ -20,7 +20,7 @@ display_status() {
     echo "Pause button:       $(onoff "$ENABLE_PAUSE_BUTTON")"
     echo "Keyboard button:    $(onoff "$ENABLE_KEYBOARD_BUTTON")"
     echo "Navigation button:  $(onoff "$ENABLE_NAV_BUTTON")"
-    echo "Back/forward btns:  $(onoff "$ENABLE_HISTORY_BUTTONS")"
+    echo "Back/forward btns:  $(onoff "$ENABLE_HISTORY_BUTTONS") (opacity ${HISTORY_BUTTONS_OPACITY}%)"
 }
 
 display_menu_builder() {
@@ -31,6 +31,7 @@ display_menu_builder() {
         "Toggle on-screen keyboard button (currently: $(onoff "$ENABLE_KEYBOARD_BUTTON"))"
         "Toggle navigation/help button (currently: $(onoff "$ENABLE_NAV_BUTTON"))"
         "Toggle on-screen back/forward buttons (currently: $(onoff "$ENABLE_HISTORY_BUTTONS"))"
+        "Back/forward button opacity (currently: ${HISTORY_BUTTONS_OPACITY}%)"
     )
     MENU_HANDLERS=(
         action_set_touch_mode
@@ -39,6 +40,7 @@ display_menu_builder() {
         action_toggle_keyboard_button
         action_toggle_nav_button
         action_toggle_history_buttons
+        action_set_history_opacity
     )
 }
 
@@ -149,3 +151,16 @@ action_toggle_history_buttons() {
     fi
     save_config
 }
+
+# How see-through the back/forward buttons are: 100 = solid, 10 = faint.
+# They get a little more solid while the mouse is over them.
+action_set_history_opacity() {
+    echo
+    echo "How solid the on-screen back/forward buttons look (10 = faint, 100 = solid)."
+    HISTORY_BUTTONS_OPACITY=$(ask_integer "Opacity percent" "$HISTORY_BUTTONS_OPACITY" 10 100)
+    save_config
+    log_success "Back/forward button opacity: ${HISTORY_BUTTONS_OPACITY}%"
+    if [[ "$ENABLE_HISTORY_BUTTONS" != "true" ]]; then
+        log_info "The buttons are off - turn them on with the entry above."
+    fi
+}