weibo: fix https://m.weibo.cn/detail/1234 urls not finding the artist.

Fix https://m.weibo.cn/detail/4506950043618873 type URLs not finding the
artist because the profile_url method returned nil instead of the actual
profile URL.

app/logical/sources/strategies/weibo.rb

@@ -53,13 +53,17 @@ module Sources
       end
 
       def profile_url
-        profile_urls.first
+        "https://www.weibo.com/u/#{artist_id}" if artist_id.present?
       end
 
       def artist_name
         api_response&.dig("user", "screen_name")
       end
 
+      def artist_id
+        parsed_url.artist_short_id || parsed_referer&.artist_short_id || api_response&.dig("user", "id")
+      end
+
       def artist_commentary_desc
         return if api_response.blank?