Add description_html field to Category

src/invidious/channels.cr

@@ -391,6 +391,7 @@ def fetch_channel_featured_channels(ucid, tab_data, view = nil, shelf_id = nil,
     return [Category.new({
       title:                query_title.not_nil!, # If continuation contents is requested then the query_title has to be passed along.
       contents:             items,
+      description_html:     "",
       browse_endpoint_data: nil,
       badges:               nil,
       auxiliary_data:       auxiliary_data,
@@ -435,6 +436,7 @@ def fetch_channel_featured_channels(ucid, tab_data, view = nil, shelf_id = nil,
       category_array << Category.new({
         title:                category.title.empty? ? fallback_title : category.title,
         contents:             category.contents,
+        description_html:     category.description_html,
         browse_endpoint_data: nil,
         badges:               nil,
         auxiliary_data:       category.auxiliary_data,
@@ -446,6 +448,7 @@ def fetch_channel_featured_channels(ucid, tab_data, view = nil, shelf_id = nil,
       category_array << Category.new({
         title:                fallback_title,
         contents:             items,
+        description_html:     "",
         browse_endpoint_data: nil,
         badges:               nil,
         auxiliary_data:       auxiliary_data,

src/invidious/helpers/extractors.cr

@@ -258,6 +258,9 @@ private class CategoryParser < ItemParser
       badges << {badge["style"].as_s, badge["label"].as_s}
     end
 
+    # Category description
+    description_html = item_contents["subtitle"]?.try { |desc| parse_content(desc) } || ""
+
     # Content parsing
     contents = [] of SearchItem
 
@@ -280,6 +283,7 @@ private class CategoryParser < ItemParser
     Category.new({
       title:                title,
       contents:             contents,
+      description_html:     description_html,
       browse_endpoint_data: browse_endpoint_data,
       badges:               badges,
       auxiliary_data:       auxiliary_data,

src/invidious/helpers/invidiousitems.cr

@@ -234,6 +234,7 @@ class Category
   property title : String
   property contents : Array(SearchItem)
   property browse_endpoint_data : String?
+  property description_html : String
   property badges : Array(Tuple(String, String))?
 
   # Data unique to only specific types of categories.