feat(gnome): Enable systemd-homed support by default

Integrates a patch to enable `systemd-homed` unconditionally across the GNOME stack. This involves:
- Enabling `-Dcreate_homed=true` in `accountsservice`.
- Removing `malcontent` dependencies and disabling parental controls from `gnome-control-center`, `gnome-initial-setup`, and `gnome-software`.
- Configuring the live generator to set `DefaultStorage=subvolume` for homed home directories.

This is a port of `gnome-build-meta!2681`.

Author: dylanmtaylor

patches/gnome-build-meta/0003-homed-Add-systemd-homed-support.patch

@@ -0,0 +1,120 @@
+From efd777d188d7c40b7d920a87728b8e7c60b23f20 Mon Sep 17 00:00:00 2001
+From: Adrian Vovk <avovk@gnome.org>
+Date: Wed, 17 Jun 2026 22:01:35 -0400
+Subject: [PATCH] Add support for systemd-homed
+
+Enable homed unconditionally: switch gnome-initial-setup to Adrian
+Vovk's homed fork for proper user creation; drop malcontent from
+gnome-control-center, gnome-initial-setup, and gnome-software;
+disable parental controls flags; enable -Dcreate_homed=true in
+accountsservice; configure the live generator to set
+DefaultStorage=subvolume for homed home directories.
+
+Port of gnome-build-meta!2681.
+
+Upstream-Status: Submitted https://gitlab.gnome.org/GNOME/gnome-build-meta/-/merge_requests/2681
+Exit condition: Drop after gnome-build-meta gnome-50 merges MR !2681
+---
+ elements/core-deps/accountsservice.bst | 4 ++++
+ elements/core/gnome-control-center.bst | 2 --
+ elements/core/gnome-initial-setup.bst  | 9 ++++-----
+ elements/core/gnome-software.bst       | 2 +-
+ files/gnomeos/live/generator.c         | 5 +++++
+ 5 files changed, 14 insertions(+), 8 deletions(-)
+
+diff --git a/elements/core-deps/accountsservice.bst b/elements/core-deps/accountsservice.bst
+index dabcfa8..73f280f 100644
+--- a/elements/core-deps/accountsservice.bst
++++ b/elements/core-deps/accountsservice.bst
+@@ -18,3 +18,7 @@ depends:
+ - freedesktop-sdk.bst:components/dbus.bst
+ - freedesktop-sdk.bst:components/polkit.bst
+ - freedesktop-sdk.bst:public-stacks/runtime-minimal.bst
++
++variables:
++  meson-local: >-
++    -Dcreate_homed=true
+diff --git a/elements/core/gnome-control-center.bst b/elements/core/gnome-control-center.bst
+index 3e59f75..babd028 100644
+--- a/elements/core/gnome-control-center.bst
++++ b/elements/core/gnome-control-center.bst
+@@ -39,7 +39,6 @@ depends:
+ - core-deps/ibus-daemon.bst
+ - core-deps/libgtop.bst
+ - core-deps/libnma.bst
+-- core-deps/malcontent.bst
+ - core-deps/samba.bst
+ - core-deps/system-config-printer.bst
+ - core-deps/udisks2.bst
+@@ -64,4 +63,3 @@ depends:
+ variables:
+   meson-local: >-
+     -Ddocumentation=true
+-    -Dmalcontent=true
+diff --git a/elements/core/gnome-initial-setup.bst b/elements/core/gnome-initial-setup.bst
+index d207fb4..98f1d9c 100644
+--- a/elements/core/gnome-initial-setup.bst
++++ b/elements/core/gnome-initial-setup.bst
+@@ -2,9 +2,9 @@ kind: meson
+ 
+ sources:
+ - kind: git_repo
+-  url: gnome:gnome-initial-setup.git
+-  track: master
+-  ref: 50.0-65-g4472cba3e9540f75fec272fd6d6d3acd90e00d1d
++  url: gnome_gitlab:AdrianVovk/gnome-initial-setup.git
++  track: homed
++  ref: 50.0-10-g952d28e3e3aefe67bc0dd2d37a0be964d2b69d66
+ 
+ build-depends:
+ - freedesktop-sdk.bst:public-stacks/buildsystem-meson.bst
+@@ -18,7 +18,6 @@ depends:
+ - core-deps/libgweather.bst
+ - core-deps/libnma.bst
+ - core-deps/librest.bst
+-- core-deps/malcontent.bst
+ - core-deps/upower.bst
+ - core/gdm.bst
+ - core/gnome-desktop.bst
+@@ -34,4 +33,4 @@ depends:
+ 
+ variables:
+   meson-local: >-
+-    -Dparental_controls=enabled
++    -Dparental_controls=disabled
+diff --git a/elements/core/gnome-software.bst b/elements/core/gnome-software.bst
+index 29e7c47..5c46b2b 100644
+--- a/elements/core/gnome-software.bst
++++ b/elements/core/gnome-software.bst
+@@ -20,7 +20,6 @@ depends:
+ - core-deps/fwupd.bst
+ - core-deps/glib-testing.bst
+ - core-deps/gnome-online-accounts.bst
+-- core-deps/malcontent.bst
+ - core-deps/snapd-glib.bst
+ - core/gnome-desktop.bst
+ - sdk/adwaita-icon-theme.bst
+@@ -49,3 +48,4 @@ variables:
+     -Dpackagekit=false
+     -Dsnap=true
+     -Dsystemd-sysupdate=true
++    -Dmalcontent=false
+diff --git a/files/gnomeos/live/generator.c b/files/gnomeos/live/generator.c
+index 8fe5b0f..bf92377 100644
+--- a/files/gnomeos/live/generator.c
++++ b/files/gnomeos/live/generator.c
+@@ -154,6 +154,11 @@ static bool handle_live(const char *generator_path, bool in_initrd) {
+                 fprintf(file, "[zram1]\nmount-point=/\nfs-type=btrfs\n");
+                 fclosep(&file);
+ 
++                mkdir("/run/systemd/homed.conf.d", 0777);
++                file = fopen("/run/systemd/homed.conf.d/00-force-subvolume.conf", "w");
++                fprintf(file, "[Home]\nDefaultStorage=subvolume\n");
++                fclosep(&file);
++
+                 if (!mark_live())
+                         return false;
+ 
+-- 
+2.54.0
+