feat: Updated the design of the category page (#8165)

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

spec/helpers/portal_helper_spec.rb

@@ -119,4 +119,19 @@ describe PortalHelper do
       end
     end
   end
+ 
+  describe '#render_category_content' do
+    let(:markdown_content) { 'This is a *test* markdown content' }
+    let(:plain_text_content) { 'This is a test markdown content' }
+    let(:renderer) { instance_double(ChatwootMarkdownRenderer) }
+
+    before do
+      allow(ChatwootMarkdownRenderer).to receive(:new).with(markdown_content).and_return(renderer)
+      allow(renderer).to receive(:render_markdown_to_plain_text).and_return(plain_text_content)
+    end
+
+    it 'converts markdown to plain text' do
+      expect(helper.render_category_content(markdown_content)).to eq(plain_text_content)
+    end
+  end
 end