fix: LED driver for every kernel, kernel headers at boot, console power button, kernel overview

- The leds-valve Makefile builds against uname -r, so every other kernel
  (e.g. linux-cachyos-lts) failed: add /etc/dkms/leds-valve-dkms.conf with
  MAKE[0]="make KVERSION=${kernelver}". DKMS now builds it for every
  installed kernel and rebuilds it on kernel updates.
- ensure-kernel-headers.service installs missing -headers for newly added
  kernels at boot, which makes DKMS build the driver for them.
- Console-like power handling on mains power: power button sleeps, no
  automatic suspend (journaled powerdevilrc).
- Menu: overview per installed kernel (headers, Steam controller driver,
  LED driver built, running kernel) and whether the LEDs are loaded.
- Menu: the selected row's highlight no longer stops after the green x.
- Theme label in the menu: "Vapor look (cachyos-vapor)".

lib/menu.sh

@@ -9,7 +9,7 @@ COMPONENTS=(gaming theme glyphs single machine)
 
 declare -A LABEL=(
     [gaming]="SteamOS conversion: boot into gaming mode, Steam on the desktop"
-    [theme]="Install SteamOS theme: Vapor look, dark mode, SteamOS taskbar"
+    [theme]="Install SteamOS theme: Vapor look (cachyos-vapor)"
     [glyphs]="Install Steam Deck/Machine icons: Deck button icons in gaming mode"
     [single]="Single user mode: no password, lock screen or log out (SDDM)"
     [machine]="Steam Machine support: LED bar driver, hardware settings in Steam"
@@ -56,12 +56,16 @@ show_menu() {
         printf "  %-3s %-6b %-6s %s\n" "$i" "$now  " "$want" "${LABEL[$c]}"
     done
     echo
+    echo -e "$KERNEL_OVERVIEW"
+    echo
 }
 
 run_menu() {
     # Sets REAPPLY. Returns 1 if the user quit. A checkbox list on a
     # terminal; a plain numbered prompt when input is piped (scripted runs).
     REAPPLY=false
+    # Built once: the TUI redraws on every key press.
+    KERNEL_OVERVIEW="$(kernel_overview)"
     if [[ -t 0 && -t 1 ]]; then
         run_menu_tui
     else
@@ -83,13 +87,16 @@ draw_menu_tui() {
         state="off"; [[ "${CURRENT[$c]}" == 1 ]] && state="${c_green}on${c_reset}"
         line="$box ${LABEL[$c]}"
         if (( i == cursor )); then
-            echo -e " ${c_cyan}>${c_reset} ${c_bold}${line}${c_reset}  (now: ${state})"
+            # The green x's reset would end the bold too: re-enable it after.
+            echo -e " ${c_cyan}>${c_reset} ${c_bold}${line//"$c_reset"/"$c_reset$c_bold"}${c_reset}  (now: ${state})"
         else
             echo -e "   ${line}  (now: ${state})"
         fi
         i=$((i + 1))
     done
     echo
+    echo -e "$KERNEL_OVERVIEW"
+    echo
     echo -e "  ${c_bold}Up/Down${c_reset} move   ${c_bold}Space${c_reset} select   ${c_bold}Enter${c_reset} run   ${c_bold}a${c_reset} run + re-apply what's on   ${c_bold}q${c_reset} quit"
 }