Kh/dev/disable admin theming via fe

[bromiesTM]

• chore: move theming config into nextcloud ncw-config#7
• update config submodule pointer

[Copilot]

Pull Request Overview

This PR implements a feature to disable admin theming via the frontend for Nextcloud Workspace. It introduces a new configuration option that allows administrators to restrict theming customizations while maintaining logo upload functionality and updating default branding to "Nextcloud Workspace".

Key changes include:

• Added disable_admin_theming configuration option with backend enforcement
• Updated default branding from "Nextcloud" to "Nextcloud Workspace" with IONOS slogan
• Modified admin interface to conditionally hide theming controls when disabled

Reviewed Changes

Copilot reviewed 10 out of 12 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
lib/private/legacy/OC_Defaults.php	Updates default branding strings and adds IONOS slogan
apps/theming/lib/ThemingDefaults.php	Adds method to check if admin theming is disabled
apps/theming/lib/Controller/ThemingController.php	Implements backend validation to prevent theming updates when disabled
apps/theming/src/AdminTheming.vue	Conditionally hides theming controls in frontend based on configuration
apps/theming/lib/Settings/Admin.php	Passes admin theming disabled state to frontend
apps/theming/tests/ThemingDefaultsTest.php	Adds unit tests for the new admin theming disabled functionality
apps/theming/lib/Command/UpdateConfig.php	Adds support for the new configuration key in CLI commands
apps/theming/src/mixins/admin/FieldMixin.js	Includes new config field in style refresh logic
apps/theming/lib/Themes/IonosTheme.php	Removes logo filter for IONOS theme
IONOS	Updates submodule pointer

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[tanyaka]

As already noticed, the is a minor visual issue for "undo changes" button for unchanged Name and Slogan input fields in theming settings for admin. The problem: The frontend was comparing current values against hardcoded default values. So let's introduce default to initial state and compare with it, see 44f420a. Also for default URL.

[tanyaka]

Review OK.