Update ghcr.io/element-hq/element-call Docker tag to v0.19.4

The derived `*_base_path` defaults concatenated `matrix_bot_maubot_path_prefix`
directly, producing `//v1` and `//plugin/` when users set the documented
`matrix_bot_maubot_path_prefix: /` (for serving on a dedicated subdomain),
which Traefik rejects. Apply the standard `'/' == path_prefix` guard already
used by other roles (honoroit, mautrix-discord, MAS, heisenbridge, etc.).

Reported by The Dark Wizard.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

roles/custom/matrix-bot-baibot/defaults/main.yml

@@ -17,7 +17,7 @@ matrix_bot_baibot_container_repo_version: "{{ 'main' if matrix_bot_baibot_versio
 matrix_bot_baibot_container_src_files_path: "{{ matrix_base_data_path }}/baibot/container-src"
 
 # renovate: datasource=docker depName=ghcr.io/etkecc/baibot
-matrix_bot_baibot_version: v1.19.1
+matrix_bot_baibot_version: v1.19.2
 matrix_bot_baibot_container_image: "{{ matrix_bot_baibot_container_image_registry_prefix }}etkecc/baibot:{{ matrix_bot_baibot_version }}"
 matrix_bot_baibot_container_image_registry_prefix: "{{ 'localhost/' if matrix_bot_baibot_container_image_self_build else matrix_bot_baibot_container_image_registry_prefix_upstream }}"
 matrix_bot_baibot_container_image_registry_prefix_upstream: "{{ matrix_bot_baibot_container_image_registry_prefix_upstream_default }}"

roles/custom/matrix-bot-maubot/defaults/main.yml

@@ -23,6 +23,9 @@ matrix_bot_maubot_initial_password: ''
 
 matrix_bot_maubot_scheme: https
 matrix_bot_maubot_hostname: ''
+
+# The path at which maubot is exposed.
+# This value must either be `/` or not end with a slash (e.g. `/_matrix/maubot`).
 matrix_bot_maubot_path_prefix: /_matrix/maubot
 
 matrix_bot_maubot_container_image_self_build: false
@@ -58,9 +61,9 @@ matrix_bot_maubot_container_src_files_path: "{{ matrix_bot_maubot_base_path }}/d
 matrix_bot_maubot_customized_container_src_files_path: "{{ matrix_bot_maubot_base_path }}/customized-docker-src"
 
 matrix_bot_maubot_bot_server_public_url: "{{ matrix_bot_maubot_scheme }}://{{ matrix_bot_maubot_hostname }}"
-matrix_bot_maubot_bot_server_base_path: "{{ matrix_bot_maubot_path_prefix }}/v1"
+matrix_bot_maubot_bot_server_base_path: "{{ '' if matrix_bot_maubot_path_prefix == '/' else matrix_bot_maubot_path_prefix }}/v1"
 matrix_bot_maubot_bot_server_ui_base_path: "{{ matrix_bot_maubot_path_prefix }}"
-matrix_bot_maubot_bot_server_plugin_base_path: "{{ matrix_bot_maubot_path_prefix }}/plugin/"
+matrix_bot_maubot_bot_server_plugin_base_path: "{{ '' if matrix_bot_maubot_path_prefix == '/' else matrix_bot_maubot_path_prefix }}/plugin/"
 matrix_bot_maubot_bot_server_appservice_base_path: "{{ matrix_bot_maubot_bot_server_base_path }}"
 
 matrix_bot_maubot_proxy_management_interface: true

roles/custom/matrix-element-call/defaults/main.yml

@@ -21,7 +21,7 @@ matrix_element_call_enabled: false
 matrix_rtc_enabled: "{{ matrix_element_call_enabled }}"
 
 # renovate: datasource=docker depName=ghcr.io/element-hq/element-call
-matrix_element_call_version: v0.19.3
+matrix_element_call_version: v0.19.4
 
 matrix_element_call_scheme: https