feat: hyprshutdown power binds, 76% scrolling windows, single-sudo sysupdate

- hyprshutdown wired into the graceful power flow (Super+Shift+O logout,
  Super+Ctrl+O power off, Super+Ctrl+Shift+O reboot) so apps close cleanly with a
  UI before Hyprland exits, instead of a hard systemctl call. Added to the hyprlua
  package list.
- Scrolling layout: default window is now 76% of the monitor along the scroll axis
  (column_width 0.5 -> 0.76).
- sysupdate.sh: primes sudo once at startup and keeps the credential alive for the
  whole run, so no later step re-prompts.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SUN7gg6GGfnToghMijLm5Y

desktopenvs/hyprlua/hypr/layouts/scrolling.lua

@@ -4,9 +4,12 @@
 --   * focus_fit_method 0/1 ("Centered follow") — see M.set_fit(); when centered the
 --     focused column is centred and the previous/next columns peek in from the sides.
 --
--- column_width is kept < 1.0 (0.5) so the active column is narrower than the viewport
+-- column_width is the default window size along the scroll axis, as a fraction of the
--- and the prev/next columns stay on-screen and clickable. fullscreen_on_one_column
+-- monitor (0.76 = 76% of the monitor's width for a horizontal tape, or its height for a
--- lets a lone window still fill the screen, so the narrow width costs nothing alone.
+-- vertical one — the layout applies it to whichever axis `direction` scrolls). Keeping it
+-- < 1.0 leaves the prev/next windows peeking in on-screen and clickable;
+-- fullscreen_on_one_column lets a lone window still fill the screen, so it costs nothing
+-- when a window is alone.
 return {
     name        = "scrolling",
     label       = "Scrolling",
@@ -18,7 +21,7 @@ return {
     config      = {
         scrolling = {
             direction                = "down",
-            column_width             = 0.5,
+            column_width             = 0.76,   -- 76% of the monitor along the scroll axis
             focus_fit_method         = 1,
             follow_focus             = true,
             fullscreen_on_one_column = true,

desktopenvs/hyprlua/hypr/usr/binds.lua

@@ -88,10 +88,12 @@ hl.bind(mainMod .. " + SHIFT + Q",       hl.dsp.exec_cmd("hyprctl kill"))
 
 hl.bind(mainMod .. " + CTRL + M",        hl.dsp.exec_cmd("~/.config/scripts/toggle-layout.sh"))
 
--- lock/exit
+-- lock/exit — hyprshutdown gracefully closes every app (with a UI) before it exits
+-- Hyprland and runs its --post-cmd, instead of yanking the session out from under them.
 hl.bind(mainMod .. " + O",               hl.dsp.exec_cmd("hyprlock"))
-hl.bind(mainMod .. " + SHIFT + O",       hl.dsp.exec_cmd("hyprctl dispatch exit"))
+hl.bind(mainMod .. " + SHIFT + O",       hl.dsp.exec_cmd("hyprshutdown"))                              -- graceful logout
-hl.bind(mainMod .. " + CTRL + O",        hl.dsp.exec_cmd("systemctl poweroff"))
+hl.bind(mainMod .. " + CTRL + O",        hl.dsp.exec_cmd('hyprshutdown -p "systemctl poweroff"'))      -- graceful power off
+hl.bind(mainMod .. " + CTRL + SHIFT + O",hl.dsp.exec_cmd('hyprshutdown -p "systemctl reboot"'))        -- graceful reboot
 hl.bind(mainMod .. " + ALT + O",         hl.dsp.exec_cmd("~/.config/scripts/pwr-dmenu.sh"))
 hl.bind(mainMod .. " + ALT + CTRL + SHIFT + END", hl.dsp.exit())
 

setup/modules/Desktop-Environments/hyprlua.sh

@@ -89,6 +89,7 @@ HYPRLUA_PACKAGES=(
 
     hyprsunset            # blue-light filter / night-mode daemon
     hypridle              # idle daemon triggering lock/suspend after inactivity
+    hyprshutdown          # hyprtoolkit graphical power/shutdown dialog (Super+Alt+O)
     ksshaskpass           # Qt SSH passphrase dialog registered as ssh-askpass
 
     nm-connection-editor   # GTK editor for NetworkManager connection profiles

sysupdate.sh

@@ -96,7 +96,17 @@ spin_stop() {
     printf '\r%*s\r' "$(_cols)" ''
 }
 
-trap 'spin_stop; tput cnorm 2>/dev/null || true' EXIT
+_SUDO_KEEPALIVE=""
+trap 'spin_stop; [[ -n "${_SUDO_KEEPALIVE:-}" ]] && kill "$_SUDO_KEEPALIVE" 2>/dev/null; tput cnorm 2>/dev/null || true' EXIT
+
+# Prime sudo ONCE at startup and keep the credential fresh for the whole run, so no
+# later step (config deploy, pacman -S per package, state-file write) re-prompts.
+sudo_prime() {
+    printf "  ${Y}?${RS}  ${BO}Elevated access${RS} — enter your password once for this run.\n"
+    sudo -v || { err "sudo is required."; exit 1; }
+    ( while true; do sudo -n true 2>/dev/null; sleep 50; kill -0 "$$" 2>/dev/null || exit; done ) &
+    _SUDO_KEEPALIVE=$!
+}
 
 # ═══════════════════════════════════════════════════════════════════════════════
 # STATE FILE
@@ -694,6 +704,7 @@ declare -a FLATPAK_PKGS=()
 
 main() {
     header
+    sudo_prime   # single password prompt up front; kept alive for the whole run
 
     # ── Configs-only mode ────────────────────────────────────────────────────
     if [[ "$UPDATE_MODE" == "configs" ]]; then