feat: add mobile sponsor banner

src/app/view/mod.rs

@@ -35,6 +35,12 @@ pub(in crate::app) use overlay::{MTEXT_TEXT_ID, TEXT_INLINE_ID};
 pub(in crate::app) const VIEWPORT_CAPTURE_BOUNDS_ID: &str = "viewport-capture-bounds";
 
 const VIEWCUBE_HIT_SIZE: f32 = VIEWCUBE_REGION_PX;
+static MOBILE_SPONSOR_IMAGE: std::sync::LazyLock<iced::widget::image::Handle> =
+    std::sync::LazyLock::new(|| {
+        iced::widget::image::Handle::from_bytes(
+            include_bytes!("../../../assets/sponsors/cad-editor-mobile-dwg-viewer.jpeg").as_slice(),
+        )
+    });
 
 /// Background used by drafting overlays in model or paper space.
 fn crosshair_background(tab: &DocumentTab, is_paper: bool) -> [f32; 4] {
@@ -3497,6 +3503,18 @@ fn start_page_content<'a>(
         )
         .interaction(iced::mouse::Interaction::Pointer)
         .on_press(Message::OpenUrl("https://open-aec.com/".to_string())),
+        mouse_area(
+            container(
+                iced::widget::image(MOBILE_SPONSOR_IMAGE.clone())
+                .width(Fill)
+                .content_fit(iced::ContentFit::Contain),
+            )
+            .width(Fill),
+        )
+        .interaction(iced::mouse::Interaction::Pointer)
+        .on_press(Message::OpenUrl(
+            "https://play.google.com/store/apps/details?id=net.cadeditor.app".to_string(),
+        )),
     ]
     .spacing(10)
     .align_x(iced::alignment::Horizontal::Center)
@@ -3511,7 +3529,7 @@ fn start_page_content<'a>(
         container(secondary_row).center_x(Fill),
         Space::new().height(iced::Length::Fixed(10.0)),
         container(reddit_btn).center_x(Fill),
-        Space::new().height(Fill),
+        Space::new().height(iced::Length::Fixed(20.0)),
         sponsors,
         Space::new().height(iced::Length::Fixed(52.0)),
     ]