feat: Add draft status for help center locales (#13768)

This adds a draft status for Help Center locales so teams can prepare
localized content in the dashboard without exposing those locales in the
public portal switcher until they are ready to publish.

Fixes: https://github.com/chatwoot/chatwoot/issues/10412
Closes: https://github.com/chatwoot/chatwoot/issues/10412

## Why

Teams need a way to work on locale-specific Help Center content ahead of
launch. The public portal should only show ready locales, while the
admin dashboard should continue to expose every allowed locale for
ongoing article and category work.

## What this change does

- Adds `draft_locales` to portal config as a subset of `allowed_locales`
- Hides drafted locales from the public portal language switchers while
keeping direct locale URLs working
- Keeps drafted locales fully visible in the admin dashboard for article
and category management
- Adds locale actions to move an existing locale to draft, publish a
drafted locale, and keep the default locale protected from drafting
- Adds a status dropdown when creating a locale so new locales can be
created as `Published` or `Draft`
- Returns each admin locale with a `draft` flag so the locale UI can
reflect the public visibility state

## Validation

- Seed a portal with multiple locales, draft one locale, and confirm the
public portal switcher hides it while `/hc/:slug/:locale` still loads
directly
- In the admin dashboard, confirm drafted locales still appear in the
locale list and remain selectable for articles and categories
- Create a new locale with `Draft` status and confirm it stays out of
the public switcher until published
- Move an existing locale back and forth between `Published` and `Draft`
and confirm the public switcher updates accordingly


## Demo 



https://github.com/user-attachments/assets/ba22dc26-c2e7-463a-b1f5-adf1fda1f9be

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

app/views/api/v1/accounts/portals/_portal.json.jbuilder

@@ -11,7 +11,7 @@ json.account_id portal.account_id
 
 json.config do
   json.allowed_locales do
-    json.array! portal.config['allowed_locales'].each do |locale|
+    json.array! portal.allowed_locale_codes.each do |locale|
       json.partial! 'api/v1/models/portal_config', formats: [:json], locale: locale, portal: portal
     end
   end

app/views/api/v1/models/_portal_config.json.jbuilder

@@ -1,3 +1,4 @@
 json.code locale
 json.articles_count portal.articles.search({ locale: locale }).size
 json.categories_count portal.categories.search_by_locale(locale).size
+json.draft portal.draft_locale?(locale)

app/views/public/api/v1/portals/_header.html.erb

@@ -78,7 +78,7 @@
       </div>
 
       <%# Locale switcher section %>
-      <% if @portal.config["allowed_locales"].length > 1 %>
+      <% if @portal.public_locale_codes.length > 1 %>
         <div id="header-action-button" class="flex items-center stroke-slate-700 dark:stroke-slate-200 text-slate-800 dark:text-slate-100">
           <div class="flex items-center gap-1 px-1 py-2 cursor-pointer">
             <%= render partial: 'icons/globe' %>
@@ -86,7 +86,10 @@
               data-portal-slug="<%= @portal.slug %>"
               class="w-24 overflow-hidden text-sm font-medium leading-tight bg-white appearance-none cursor-pointer dark:bg-slate-900 text-ellipsis whitespace-nowrap focus:outline-none focus:shadow-outline locale-switcher"
             >
-              <% @portal.config["allowed_locales"].each do |locale| %>
+              <% if @portal.draft_locale?(@locale) %>
+                <option selected disabled value="<%= @locale %>"><%= "#{language_name(@locale)} (#{@locale})" %></option>
+              <% end %>
+              <% @portal.public_locale_codes.each do |locale| %>
                 <option <%= locale == @locale ? 'selected': '' %> value="<%= locale %>"><%= "#{language_name(locale)} (#{locale})" %></option>
               <% end %>
             </select>

app/views/public/api/v1/portals/_mobile_menu.html.erb

@@ -1,4 +1,4 @@
-<% has_multiple_locales = @portal.config["allowed_locales"].length > 1 %>
+<% has_multiple_locales = @portal.public_locale_codes.length > 1 %>
 
 <input type="checkbox" id="mobile-menu-toggle" class="peer/menu hidden" />
 
@@ -63,7 +63,10 @@
                 data-portal-slug="<%= @portal.slug %>"
                 class="flex-1 bg-transparent text-lg font-medium cursor-pointer focus:outline-none locale-switcher text-slate-800 dark:text-slate-100 hover:text-slate-700 dark:hover:text-slate-200"
               >
-                <% @portal.config["allowed_locales"].each do |locale| %>
+                <% if @portal.draft_locale?(@locale) %>
+                  <option selected disabled value="<%= @locale %>"><%= "#{language_name(@locale)} (#{@locale})" %></option>
+                <% end %>
+                <% @portal.public_locale_codes.each do |locale| %>
                   <option <%= locale == @locale ? 'selected': '' %> value="<%= locale %>"><%= "#{language_name(locale)} (#{locale})" %></option>
                 <% end %>
               </select>