[Bug Fix] Avatar: stop lazy-loading image so it is never stuck hidden

An uncached AvatarImage could get permanently stuck on the fallback. The
avatar controller hides a still-loading image with display:none (the
`hidden` class) so the fallback shows, but the image was rendered with
loading="lazy". Browsers never fetch a loading="lazy" image that
generates no box, so its `load` event never fired and showImage() was
never called — the image stayed hidden indefinitely. Cached images were
unaffected because they are already complete at connect().

Remove loading="lazy" so the image loads eagerly even while hidden; the
load/error handlers then reveal it. This matches shadcn/radix, which do
not lazy-load the avatar image.

Fixes #415

Author: djalmaaraujo

gem/lib/ruby_ui/avatar/avatar_image.rb

@@ -16,7 +16,11 @@ def view_template
 
     def default_attrs
       {
-        loading: "lazy",
+        # NB: do not set loading: "lazy" here. avatar_controller hides a not-yet-loaded
+        # image with `display:none` (the `hidden` class) so the fallback shows. The
+        # browser never fetches a `loading="lazy"` image that generates no box, so its
+        # `load` event never fires and the image stays hidden forever (#415). shadcn/radix
+        # do not lazy-load the avatar image either.
         data: {
           ruby_ui__avatar_target: "image",
           action: "load->ruby-ui--avatar#showImage error->ruby-ui--avatar#showFallback"

gem/test/ruby_ui/avatar_test.rb

@@ -19,4 +19,18 @@ def test_render_with_all_items
     assert_match(/class="aspect-square h-full w-full"/, output)
     refute_match(/class="[^"]*\bhidden\b[^"]*aspect-square/, output)
   end
+
+  def test_image_is_not_lazy_loaded
+    # Regression for #415: the controller hides a still-loading image with
+    # display:none, and a loading="lazy" image with no box is never fetched, so
+    # it would stay hidden forever. The avatar image must load eagerly.
+    output = phlex do
+      RubyUI.Avatar do
+        RubyUI.AvatarImage(src: "https://avatars.githubusercontent.com/u/246692?v=4", alt: "joeldrapper")
+        RubyUI.AvatarFallback { "JD" }
+      end
+    end
+
+    refute_match(/loading="lazy"/, output)
+  end
 end