fix(test): build iced_test against this fork's runtime and renderer style

`iced_test` has not compiled here since it arrived from upstream: it
matches `runtime::Action` exhaustively without the fork's `Dnd` and
`PlatformSpecific` variants, and builds `renderer::Style` without the
fork's `icon_color` and `scale_factor` fields. Nothing else in the
workspace depends on it, so the errors only show up in
`cargo test --workspace` and for anyone adding the crate to an
application.

The emulator ignores the two actions: drag and drop and platform
surfaces need a windowing system, which it has none of. The style
fields follow what the winit runtime passes: the icon color is the
text color, and the scale factor is the one the emulator or simulator
already renders its screenshot at.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

test/src/emulator.rs

@@ -273,6 +273,11 @@ impl<P: Program + 'static> Emulator<P> {
                 runtime::Action::Reload => {
                     // TODO
                 }
+                runtime::Action::Dnd(_)
+                | runtime::Action::PlatformSpecific(_) => {
+                    // Drag and drop and platform surfaces need a
+                    // windowing system, which an emulator has none of.
+                }
             },
         }
     }
@@ -474,7 +479,9 @@ impl<P: Program + 'static> Emulator<P> {
             &mut self.renderer,
             theme,
             &renderer::Style {
+                icon_color: style.text_color,
                 text_color: style.text_color,
+                scale_factor: f64::from(scale_factor),
             },
             mouse::Cursor::Unavailable,
         );

test/src/simulator.rs

@@ -209,17 +209,19 @@ where
             &mut self.messages,
         );
 
+        let scale_factor = 2.0_f32;
+
         self.raw.draw(
             &mut self.renderer,
             theme,
             &core::renderer::Style {
+                icon_color: base.text_color,
                 text_color: base.text_color,
+                scale_factor: f64::from(scale_factor),
             },
             self.cursor,
         );
 
-        let scale_factor = 2.0;
-
         let physical_size = Size::new(
             (self.size.width * scale_factor).round() as u32,
             (self.size.height * scale_factor).round() as u32,