Run the kiosk on Chromium, and take the stray media server off musicdolphin

Chromium: same page, same machine, idle, Firefox 24.2% of a core against Chromium's
11.4%. The build comes from archive.raspberrypi.com (a "+rpt" version) and is patched
for this board's V3D GPU; Debian ships a much older chromium, so the archive matters.
The whole userland here is 32-bit armhf on a 64-bit kernel, which Firefox handles worse
than Chromium does. --use-gl=egl, --enable-gpu-rasterization, --ignore-gpu-blocklist
and --enable-zero-copy are what keep rasterization on the GPU: Chromium's blocklist
does not recognise this driver and silently falls back to software without them.
pi_kiosk_browser: firefox still works, as the fallback if an update ever regresses.

Debug mode also gains xdotool, scrot and --remote-debugging-port=9222 (on 127.0.0.1),
because firing XTEST key events at a window lands about half the time and a benchmark
you cannot verify the state of is worse than none.

pi_squeezeserver gains an absent path, and mediapis.yml derives its state from
mediapi_has_squeezeserver, which defaults to false for the whole group. false means
"actively remove", not "skip": musicdolphin has been running a Logitech Media Server
that no playbook installs and nothing talks to - every squeezelite in the fleet points
at pi_squeezelite_squeezeserver (192.168.178.80, the server) - while costing ~30 MB
resident and ~47 MB of swap on a 2 GB Pi that also drives the kiosk. The absent path
stops it, purges the package, unregisters it from sysdweb, drops the port 80 -> 9000
redirect and deletes its database and logs.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

roles/pi_squeezeserver/tasks/present.yml

@@ -0,0 +1,45 @@
+---
+- name: Install packages required for squeeze server
+  ansible.builtin.apt:
+    name:
+      - libsox-fmt-all
+      - libflac-dev
+      - libfaad2
+      - libmad0
+      - perl-openssl-defaults
+      - libnet-ssleay-perl
+      - libio-socket-ssl-perl
+      - nasm
+      - build-essential
+      - iptables-persistent
+    cache_valid_time: 7200
+    state: present
+- name: Copy squeezeserver package
+  ansible.builtin.copy:
+    src: logitechmediaserver_8.4.0_arm.deb
+    dest: /tmp
+    mode: "0644"
+- name: Install squeezeserver package
+  ansible.builtin.apt:
+    deb: /tmp/logitechmediaserver_8.4.0_arm.deb
+- name: Enable sysdweb autostart
+  ansible.builtin.systemd:
+    name: logitechmediaserver
+    state: started
+    enabled: "yes"
+- name: Add to sysdweb
+  ansible.builtin.include_role:
+    name: pi_sysdweb
+  vars:
+    pi_sysdweb_name: logitechmediaserver
+- name: Forward port 80 to 9000
+  ansible.builtin.iptables:
+    table: nat
+    chain: PREROUTING
+    in_interface: eth0
+    protocol: tcp
+    match: tcp
+    destination_port: "80"
+    jump: REDIRECT
+    to_ports: "9000"
+    comment: Redirect web traffic to port 9000