Remove the HA Dashboard tab and the Qt WebEngine dependency (D40)

DSH-1 ended with a negative result: the Frame's system WebEngine can't be
loaded, and bundling our own failed (no sandbox, ICU resources, Vulkan
abort, empty page). Reverts the tab (60deb43), the container packages
(0676998) and the bundler's WebEngine support (b823ff3, e2cfa8e), and
updates the docs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

cmake/BundleQt.cmake

@@ -30,14 +30,6 @@ set(VRDASH_BUNDLE_PLUGINS
     wayland-shell-integration/*.so wayland-graphics-integration-client/*.so
     wayland-decoration-client/*.so xcbglintegrations/*.so)
 
-# Qt WebEngine (bundled only if a dashboard needs it): its helper process, resources and
-# locales. Cross builds point VRDASH_WEBENGINE_PROCESS at the target's QtWebEngineProcess
-# (Debian can't install the arm64 one next to the host's; see docker/cross-arm64.Dockerfile).
-set(VRDASH_WEBENGINE_PROCESS "" CACHE FILEPATH
-    "QtWebEngineProcess to bundle (default: the one of the Qt used for the build)")
-# Locales shipped with WebEngine (the full set is about 35 MB).
-set(VRDASH_WEBENGINE_LOCALES en-US de)
-
 function(vrdash_bundle_qt)
     get_property(targets GLOBAL PROPERTY VRDASH_DASHBOARD_TARGETS)
     get_property(qml_dirs GLOBAL PROPERTY VRDASH_DASHBOARD_QML_DIRS)
@@ -60,14 +52,6 @@ function(vrdash_bundle_qt)
         set(qt_libdir ${qt_prefix}/lib/${CMAKE_LIBRARY_ARCHITECTURE}) # Debian multiarch
     endif()
 
-    # Used by the install script only if a bundled library is Qt WebEngine.
-    set(webengine_process ${VRDASH_WEBENGINE_PROCESS})
-    if(NOT webengine_process)
-        set(webengine_process ${QT6_INSTALL_PREFIX}/${QT6_INSTALL_LIBEXECS}/QtWebEngineProcess)
-    endif()
-    set(webengine_resources ${QT6_INSTALL_PREFIX}/${QT6_INSTALL_DATA}/resources)
-    set(webengine_locales ${QT6_INSTALL_PREFIX}/${QT6_INSTALL_TRANSLATIONS}/qtwebengine_locales)
-
     # The regexes end up inside a quoted string in the generated script: escape backslashes.
     string(REPLACE "\\" "\\\\" bundle_exclude "${VRDASH_BUNDLE_EXCLUDE}")
 

cmake/bundle-install.cmake.in

@@ -14,9 +14,6 @@ set(qt_plugins "@QT6_INSTALL_PREFIX@/@QT6_INSTALL_PLUGINS@")
 set(qt_qml "@QT6_INSTALL_PREFIX@/@QT6_INSTALL_QML@")
 set(patchelf "@VRDASH_PATCHELF@")
 set(exclude "@bundle_exclude@")
-set(webengine_process "@webengine_process@")
-set(webengine_resources "@webengine_resources@")
-set(webengine_locales "@webengine_locales@")
 
 message(STATUS "Bundling Qt into ${prefix}")
 
@@ -81,35 +78,6 @@ file(GET_RUNTIME_DEPENDENCIES
     RESOLVED_DEPENDENCIES_VAR resolved
     UNRESOLVED_DEPENDENCIES_VAR unresolved)
 
-# --- Qt WebEngine: helper process (and its libraries), resources, locales ----------------
-# Only if a dashboard uses it. Found through qt.conf (LibraryExecutables, Data,
-# Translations; written below).
-set(helper_executables "")
-if(resolved MATCHES "libQt6WebEngineCore")
-    message(STATUS "Bundling Qt WebEngine (${webengine_process})")
-    # TYPE PROGRAM: a plain file(INSTALL) would drop the executable bit.
-    file(INSTALL "${webengine_process}" DESTINATION "${prefix}/libexec" TYPE PROGRAM
-         FOLLOW_SYMLINK_CHAIN)
-    list(APPEND helper_executables "${prefix}/libexec/QtWebEngineProcess")
-    file(GET_RUNTIME_DEPENDENCIES
-        EXECUTABLES ${helper_executables}
-        DIRECTORIES "@qt_libdir@" "${libdir}"
-        PRE_EXCLUDE_REGEXES ${exclude}
-        POST_EXCLUDE_REGEXES "^${libdir}/"
-        RESOLVED_DEPENDENCIES_VAR helper_resolved
-        UNRESOLVED_DEPENDENCIES_VAR helper_unresolved)
-    list(APPEND resolved ${helper_resolved})
-    list(APPEND unresolved ${helper_unresolved})
-    list(REMOVE_DUPLICATES resolved)
-    list(REMOVE_DUPLICATES unresolved)
-    file(GLOB files LIST_DIRECTORIES false "${webengine_resources}/*")
-    file(INSTALL ${files} DESTINATION "${prefix}/resources")
-    foreach(locale @VRDASH_WEBENGINE_LOCALES@)
-        file(INSTALL "${webengine_locales}/${locale}.pak"
-             DESTINATION "${prefix}/translations/qtwebengine_locales")
-    endforeach()
-endif()
-
 if(unresolved)
     message(WARNING "Unresolved (expected on target system): ${unresolved}")
 endif()
@@ -131,7 +99,7 @@ foreach(lib IN LISTS bundled_libs)
         set_rpath("${lib}" "\$ORIGIN")
     endif()
 endforeach()
-foreach(file IN LISTS qt_plugin_files qml_plugins helper_executables)
+foreach(file IN LISTS qt_plugin_files qml_plugins)
     get_filename_component(dir "${file}" DIRECTORY)
     file(RELATIVE_PATH rel "${dir}" "${libdir}")
     set_rpath("${file}" "\$ORIGIN/${rel}")
@@ -144,14 +112,11 @@ find_program(dpkg dpkg)
 if(dpkg)
     set(docdir "${prefix}/@CMAKE_INSTALL_DOCDIR@/third-party")
     set(packages "")
-    foreach(file IN LISTS resolved qt_plugin_files qml_plugins helper_executables)
+    foreach(file IN LISTS resolved qt_plugin_files qml_plugins)
         # Ask dpkg about the original file: map installed plugins back, resolve
         # symlinks and /lib -> /usr/lib (usrmerge: packages register /usr paths).
         string(REPLACE "${plugindir}" "${qt_plugins}" original "${file}")
         string(REPLACE "${qmldir}" "${qt_qml}" original "${original}")
-        if(file STREQUAL "${prefix}/libexec/QtWebEngineProcess")
-            set(original "${webengine_process}")
-        endif()
         file(REAL_PATH "${original}" original)
         execute_process(COMMAND "${dpkg}" -S "${original}" OUTPUT_VARIABLE owner
                         ERROR_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
@@ -193,9 +158,6 @@ Prefix = ..
 Libraries = @CMAKE_INSTALL_LIBDIR@
 Plugins = plugins
 QmlImports = qml
-LibraryExecutables = libexec
-Data = .
-Translations = translations
 ")
 
 list(LENGTH resolved n_libs)