Lower the battery threshold to 30% and default the cachy-update prompt to yes

The prompt offering to silence cachy-update's own update notification now
defaults to yes: once updates install themselves that notification is nothing
but noise, so the common answer should be the one you get by pressing Enter.

It also accepts "j" now. The prompt is translated, so a German user reads
"[J/n]" and types the German letter - which the old check for "y" alone
silently read as a refusal.

src/cachy-auto-update

@@ -117,9 +117,17 @@ cau_offer_disable_cachy_update() {
 	(( found )) || return 0
 
 	printf '\n  %s\n  ' \
-		"$(cau_msg "cachy-update also notifies about available updates. Turn its notifications off? [y/N]")"
+		"$(cau_msg "cachy-update also notifies about available updates. Turn its notifications off? [Y/n]")"
 	read -r answer || return 0
-	[[ ${answer,,} == y ]] || return 0
+
+	# Defaults to yes: once updates install themselves, cachy-update's "N
+	# updates available" is purely noise. "j" is accepted too - the prompt is
+	# translated, so a German user types the German letter and used to have
+	# that silently read as "no".
+	case "${answer,,}" in
+		''|y|yes|j|ja) ;;
+		*) return 0 ;;
+	esac
 
 	while read -r user uid; do
 		[[ -n $user ]] || continue

src/lib/config.sh

@@ -134,7 +134,7 @@ cau_config_load() {
 
 	CFG_INTERVAL="$(cau_config_get UpdateInterval 1d)"
 	CFG_INTERVAL_SECONDS="$(cau_duration_to_seconds "$CFG_INTERVAL" 86400)"
-	CFG_MIN_BATTERY="$(cau_config_int MinBatteryPercent 40)"
+	CFG_MIN_BATTERY="$(cau_config_int MinBatteryPercent 30)"
 	CFG_KEEP_OLD="$(cau_config_int KeepOldPackages 3)"
 	CFG_AUR_HELPER="$(cau_config_get AURHelper auto)"
 	CFG_IGNORE_PKG="$(cau_config_get IgnorePkg '')"

src/lib/menu.sh

@@ -135,7 +135,7 @@ CAU_SETTINGS=(
 	"UpdateInterval|choice:6h 12h 1d 2d 1w|1d|Time between update runs"
 	"SkipWhenGaming|bool|yes|Postpone while a game is running"
 	"RequireAC|bool|no|Only update on mains power"
-	"MinBatteryPercent|choice:0 20 30 40 50 60 70 80|40|Minimum battery level (%)"
+	"MinBatteryPercent|choice:0 20 30 40 50 60 70 80|30|Minimum battery level (%)"
 	"UpdateAUR|bool|yes|Update AUR packages"
 	"UpdateFlatpak|bool|yes|Update Flatpaks"
 	"UpdateAppImages|bool|yes|Update AppImages"