Prevent rendering menus when in a global create context

app/views/layouts/_common_head.html.erb

@@ -6,7 +6,7 @@
 <% relative_url_root = OpenProject::Configuration['rails_relative_url_root'] || '' %>
 <meta name="app_base_path" content="<%= relative_url_root %>"/>
 <base href="<%= relative_url_root %>/" />
-<% if @project %>
+<% if @global_create_context.nil? && @project %>
   <meta name="current_project"
         data-project-name="<%= h @project.name %>"
         data-project-id="<%= @project.id %>"

app/views/layouts/base.html.erb

@@ -62,7 +62,7 @@ See COPYRIGHT and LICENSE files for more details.
 <op-toasts-container></op-toasts-container>
 <op-modal-overlay></op-modal-overlay>
 <spot-drop-modal-portal></spot-drop-modal-portal>
-<% main_menu = render_main_menu(local_assigns.fetch(:menu_name, nil), @project) %>
+<% main_menu = render_main_menu(local_assigns.fetch(:menu_name, nil), @global_create_context.nil? && @project) %>
 <% side_displayed = content_for?(:sidebar) || content_for?(:main_menu) || !main_menu.blank? %>
 <% initial_classes = initial_menu_classes(side_displayed, show_decoration) %>
 <div id="wrapper" style="<%= initial_menu_styles(side_displayed) %>" class="<%= initial_classes %>">

modules/meeting/app/controllers/meetings_controller.rb

@@ -28,6 +28,7 @@
 
 class MeetingsController < ApplicationController
   around_action :set_time_zone
+  before_action :set_global_create_context, only: %i[new]
   before_action :find_optional_project, only: %i[index new create]
   before_action :build_meeting, only: %i[new create]
   before_action :find_meeting, except: %i[index new create]
@@ -124,6 +125,12 @@ def set_time_zone(&)
     Time.use_zone(zone, &)
   end
 
+  def set_global_create_context
+    if global_create_context?
+      @global_create_context = true
+    end
+  end
+
   def build_meeting
     @meeting = Meeting.new
     if meeting_params.present?