fix(de): disable greetd so ly is the sole greeter on hyprlua/hyprland

core.sh enables greetd (tuigreet) on every install, but the ly-based Hyprland
DEs only disabled getty@tty1 and enabled ly@tty1 — leaving both display
managers enabled and racing for tty1, so the stale greetd/tuigreet greeter
could win and show the old text login instead of ly.

Add a disable_service helper (mirrors enable_service; best-effort, non-fatal)
and call disable_service greetd.service in hyprlua.sh and hyprland.sh right
before enabling ly@tty1, so ly owns the login screen.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MUhrcFU8J1Hnf7vNqNxZNi

setup/modules/Desktop-Environments/hyprland.sh

@@ -156,6 +156,12 @@ enable_service NetworkManager.service
 # '|| true' prevents abort if the unit is already disabled or doesn't exist.
 sudo systemctl disable getty@tty1.service || true
 
+# Disable greetd, which core.sh enables by default for every install. This DE
+# uses ly as its greeter, so leaving greetd enabled means two display managers
+# both race to claim tty1 — and the stale greetd/tuigreet greeter can win,
+# showing the old text login instead of ly. Disable it so ly is the sole greeter.
+disable_service greetd.service
+
 # ly is the TUI display manager that runs on tty1 and launches Hyprland after
 # the user logs in.
 enable_service ly@tty1.service

setup/modules/Desktop-Environments/hyprlua.sh

@@ -159,6 +159,12 @@ enable_service NetworkManager.service
 # '|| true' prevents abort if the unit is already disabled.
 sudo systemctl disable getty@tty1.service || true
 
+# Disable greetd, which core.sh enables by default for every install. hyprlua
+# uses ly as its greeter, so leaving greetd enabled means two display managers
+# both race to claim tty1 — and the stale greetd/tuigreet greeter can win,
+# showing the old text login instead of ly. Disable it so ly is the sole greeter.
+disable_service greetd.service
+
 # ly: TUI display manager that presents the login screen on tty1.
 enable_service ly@tty1.service
 

setup/modules/lib/logging.sh

@@ -75,6 +75,16 @@ enable_service() {
         || warn "Could not enable: $* — enable it after first boot."
 }
 
+# disable_service: disable units so they don't start at boot. Best-effort —
+# a failure (e.g. unit absent) is warned, never fatal. Used when a DE module
+# needs to turn off a greeter/service that core.sh or another module enabled
+# (e.g. a ly-based DE disabling the greetd core.sh enables by default) so two
+# display managers don't both try to claim tty1.
+disable_service() {
+    sudo systemctl disable "$@" 2>/dev/null \
+        || warn "Could not disable: $* — disable it after first boot."
+}
+
 # start_service: start units only when a system manager is actually running.
 # Inside the installer chroot there is none, so we skip — the unit starts on
 # first boot via its enable symlink.