desktop: switch to sway as sole active session and group default

Remove i3 from desktop_sessions_enabled on ikaros, nymph, and the
desktop group_vars; set sway/wayland as default for all desktop hosts.
Copy 60-camera-priority.conf into host_sway_dotfiles on nymph so
WirePlumber camera priority is still deployed under the sway session.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ansible/inventory/group_vars/desktop.yml

@@ -2,10 +2,10 @@
 desktop_protonmail_bridge_cert_path: ~/.var/app/ch.protonmail.protonmail-bridge/config/protonmail/bridge-v3/cert.pem
 
 desktop_sessions_enabled:
-  - i3
+  - sway
 
-desktop_default_session: i3
-desktop_default_session_env: xorg
+desktop_default_session: sway
+desktop_default_session_env: wayland
 desktop_prompt_for_session: true
 
 desktop_source_tools:

ansible/inventory/host_vars/ikaros.yml

@@ -2,11 +2,10 @@
 hostname: ikaros
 
 desktop_sessions_enabled:
-  - i3
   - sway
 
-desktop_default_session: i3
-desktop_default_session_env: xorg
+desktop_default_session: sway
+desktop_default_session_env: wayland
 
 host_packages:
   - openssh

ansible/inventory/host_vars/nymph.yml

@@ -2,11 +2,10 @@
 hostname: nymph
 
 desktop_sessions_enabled:
-  - i3
   - sway
 
-desktop_default_session: i3
-desktop_default_session_env: xorg
+desktop_default_session: sway
+desktop_default_session_env: wayland
 desktop_emptty_session_error_logging: rotate
 
 host_packages:
@@ -42,3 +41,6 @@ host_sway_dotfiles:
   - src: .config/kanshi/
     dest: .config/kanshi/
     mode: preserve
+  - src: .config/wireplumber/wireplumber.conf.d/60-camera-priority.conf
+    dest: .config/wireplumber/wireplumber.conf.d/60-camera-priority.conf
+    mode: "0644"