fix: tabbed-code radio rendering crashes Arizona renderer (#44)

Returning {input, Attrs, []} from a function called via ?each
bypasses Arizona's parse transform, and the runtime renderer's
to_bin/1 doesn't accept the 3-tuple void-element form. This took
down the homepage with a bad_template_value crash.

Inline the input tuple into the ?each lambda so the parse transform
compiles it directly, switch to the void-element 2-tuple shorthand
{input, Attrs}, and use {checked, N =:= 1} (Arizona strips false
boolean attrs at parse time) to keep first-tab-checked behaviour
without a second clause.

Author: Taure

src/views/asobi_site_tabbed_code.erl

@@ -34,7 +34,17 @@ render(Bindings) ->
     Indexed = lists:zip(lists:seq(1, length(Tabs)), Tabs),
     ?html(
         {'div', [{class, ~"tabbed-code"}], [
-            ?each(fun({N, _Tab}) -> radio(Id, N) end, Indexed),
+            ?each(
+                fun({N, _Tab}) ->
+                    {input, [
+                        {type, ~"radio"},
+                        {name, Id},
+                        {id, input_id(Id, N)},
+                        {checked, N =:= 1}
+                    ]}
+                end,
+                Indexed
+            ),
             {'div', [{class, ~"tabbed-code-labels"}, {role, ~"tablist"}], [
                 ?each(
                     fun({N, #{label := Label}}) ->
@@ -56,26 +66,6 @@ render(Bindings) ->
         ]}
     ).
 
-%% The first radio is checked by default so one tab is visible before
-%% any user interaction.
-radio(Id, 1) ->
-    {input,
-        [
-            {type, ~"radio"},
-            {name, Id},
-            {id, input_id(Id, 1)},
-            {checked, ~"checked"}
-        ],
-        []};
-radio(Id, N) ->
-    {input,
-        [
-            {type, ~"radio"},
-            {name, Id},
-            {id, input_id(Id, N)}
-        ],
-        []}.
-
 input_id(Id, N) ->
     iolist_to_binary([Id, $-, integer_to_binary(N)]).