Fix duration in /api/v1/search

src/invidious.cr

@@ -3412,7 +3412,7 @@ get "/api/v1/search" do |env|
   date = env.params.query["date"]?.try &.downcase
   date ||= ""
 
-  duration = env.params.query["date"]?.try &.downcase
+  duration = env.params.query["duration"]?.try &.downcase
   duration ||= ""
 
   features = env.params.query["features"]?.try &.split(",").map { |feature| feature.downcase }

src/invidious/search.cr

@@ -188,7 +188,7 @@ def produce_search_params(sort : String = "relevance", date : String = "", conte
             end
   end
 
-  if body.size > 0
+  if !body.empty?
     token = head + "\x12" + body.size.unsafe_chr + body
   else
     token = head