Autostart using systemd instead of gnome-session

[ryonakano]

Fixes #47
Goes with #51

Checklists

• Package build succeeds with debuild -us -uc with control: Add systemd-dev #51
• Package installation succeeds
• The systemd service is enabled after installation
• The systemd service starts automatically after reboot

Details

user@elementary-9-daily:~$ sudo apt purge io.elementary.bluetooth-daemon 
The following packages were automatically installed and are no longer required:
  libgssdp-1.6-0  libgupnp-av-1.0-3    libmediaart-2.0-0    librygel-db-2.8-0        librygel-server-2.8-0
  libgupnp-1.6-0  libgupnp-dlna-2.0-4  librygel-core-2.8-0  librygel-renderer-2.8-0  rygel
Use 'sudo apt autoremove' to remove them.

REMOVING:
  io.elementary.bluetooth-daemon*  io.elementary.settings.bluetooth*
  io.elementary.panel.bluetooth*   io.elementary.settings.sharing*

Summary:
  Upgrading: 0, Installing: 0, Removing: 4, Not Upgrading: 0
  Freed space: 3,654 kB

Continue? [Y/n] y
(Reading database… 154142 files and directories currently installed.)
Removing io.elementary.settings.sharing (8.0.3+r1020+pkg21~daily~ubuntu9.1)…
Removing io.elementary.panel.bluetooth (8.0.0+r884+pkg40~daily~ubuntu9.1)…
Removing io.elementary.settings.bluetooth (8.0.2+r898+pkg356~daily~ubuntu9.1)…
Removing io.elementary.bluetooth-daemon (1.1.0+r276+pkg5~daily~ubuntu9.1)…
Processing triggers for hicolor-icon-theme (0.18-2build1)…
Processing triggers for libglib2.0-0t64:amd64 (2.88.0-1)…
Processing triggers for desktop-file-utils (0.28-1build1)…
(Reading database… 153311 files and directories currently installed.)
Purging configuration files for io.elementary.bluetooth-daemon (1.1.0+r276+pkg5~daily~ubuntu9.1)…
user@elementary-9-daily:~$ killall io.elementary.bluetooth 
user@elementary-9-daily:~$ sudo apt install ./io.elementary.bluetooth-daemon_1.1.0_amd64.deb 
Note, selecting 'io.elementary.bluetooth-daemon' instead of './io.elementary.bluetooth-daemon_1.1.0_amd64.deb'
The following packages were automatically installed and are no longer required:
  libgssdp-1.6-0  libgupnp-av-1.0-3    libmediaart-2.0-0    librygel-db-2.8-0        librygel-server-2.8-0
  libgupnp-1.6-0  libgupnp-dlna-2.0-4  librygel-core-2.8-0  librygel-renderer-2.8-0  rygel
Use 'sudo apt autoremove' to remove them.

Installing:
  io.elementary.bluetooth-daemon

Summary:
  Upgrading: 0, Installing: 1, Removing: 0, Not Upgrading: 0
  Download size: 0 B / 108 kB
  Space needed: 1,092 kB / 51.5 GB available

Get:1 /home/user/io.elementary.bluetooth-daemon_1.1.0_amd64.deb io.elementary.bluetooth-daemon amd64 1.1.0 [108 kB]
Selecting previously unselected package io.elementary.bluetooth-daemon.
(Reading database… 153312 files and directories currently installed.)
Preparing to unpack …/io.elementary.bluetooth-daemon_1.1.0_amd64.deb…
Unpacking io.elementary.bluetooth-daemon (1.1.0)…
Setting up io.elementary.bluetooth-daemon (1.1.0)…
Created symlink '/etc/systemd/user/gnome-session-initialized.target.wants/io.elementary.bluetooth.service' → '/usr/lib/system
d/user/io.elementary.bluetooth.service'.
Processing triggers for desktop-file-utils (0.28-1build1)…
Processing triggers for hicolor-icon-theme (0.18-2build1)…
Processing triggers for libglib2.0-0t64:amd64 (2.88.0-1)…
Notice: Download is performed unsandboxed as root as file '/home/user/io.elementary.bluetooth-daemon_1.1.0_amd64.deb' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied)
user@elementary-9-daily:~$ systemctl status --user io.elementary.bluetooth.service 
○ io.elementary.bluetooth.service - Bluetooth Daemon
     Loaded: loaded (/usr/lib/systemd/user/io.elementary.bluetooth.service; enabled; preset: enabled)
     Active: inactive (dead)
user@elementary-9-daily:~$ systemctl restart --user io.elementary.bluetooth.service 
user@elementary-9-daily:~$ systemctl status --user io.elementary.bluetooth.service 
● io.elementary.bluetooth.service - Bluetooth Daemon
     Loaded: loaded (/usr/lib/systemd/user/io.elementary.bluetooth.service; enabled; preset: enabled)
     Active: active (running) since Sat 2026-08-15 17:19:14 JST; 1s ago
 Invocation: 1710f8fdb6b24c939e5ec5cacaeff0e3
   Main PID: 3664 (io.elementary.b)
      Tasks: 7 (limit: 7897)
     Memory: 6.7M (peak: 7.2M)
        CPU: 59ms
     CGroup: /user.slice/user-1000.slice/user@1000.service/session.slice/_io.elementary.bluetooth.service
             └─3664 /usr/bin/io.elementary.bluetooth -s

Aug 15 17:19:14 elementary-9-daily systemd[1557]: Starting io.elementary.bluetooth.service - Bluetooth Daemon...
Aug 15 17:19:14 elementary-9-daily systemd[1557]: Started io.elementary.bluetooth.service - Bluetooth Daemon.
user@elementary-9-daily:~$