feat(eckhart): introduce ConnectionIndicator

diff --git a/core/embed/rust/src/ui/layout_eckhart/component/connection_indicator.rs b/core/embed/rust/src/ui/layout_eckhart/component/connection_indicator.rs
new file mode 100644
index 00000000..39c34e8e
--- /dev/null
+++ b/core/embed/rust/src/ui/layout_eckhart/component/connection_indicator.rs
@@ -0,0 +1,120 @@
+use crate::{
+    trezorhal::usb,
+    ui::{
+        component::{Component, Event, EventCtx},
+        event::USBEvent,
+        geometry::Rect,
+        shape::Renderer,
+    },
+};
+
+#[cfg(feature = "ble")]
+use crate::{trezorhal::ble, ui::event::BLEEvent};
+
+use super::super::cshape::{render_connected_indicator, INDICATOR_OUTER_RADIUS};
+
+pub struct ConnectionIndicator {
+    pub area: Rect,
+    pub connected: bool,
+}
+
+impl ConnectionIndicator {
+    pub const AREA_SIZE_NEEDED: i16 = 2 * INDICATOR_OUTER_RADIUS + 4;
+    pub const fn new() -> Self {
+        Self {
+            area: Rect::zero(),
+            connected: false,
+        }
+    }
+
+    /// Create with current actual connection status polled at construction
+    /// time.
+    pub fn new_polled() -> Self {
+        Self {
+            area: Rect::zero(),
+            connected: is_connected(),
+        }
+    }
+
+    pub fn content_width(&self) -> i16 {
+        if self.connected {
+            Self::AREA_SIZE_NEEDED
+        } else {
+            0
+        }
+    }
+}
+
+impl Component for ConnectionIndicator {
+    type Msg = ();
+
+    fn place(&mut self, bounds: Rect) -> Rect {
+        // enforce that the bounds are big enough to fit the indicator + padding
+        debug_assert_eq!(bounds.width(), Self::AREA_SIZE_NEEDED);
+        debug_assert_eq!(bounds.height(), Self::AREA_SIZE_NEEDED);
+        self.area = bounds;
+        self.area
+    }
+
+    /// Return Some(()) when the connection status changes, None otherwise
+    fn event(&mut self, ctx: &mut EventCtx, event: Event) -> Option<Self::Msg> {
+        let old_connected = self.connected;
+        match event {
+            Event::Attach(_) => {
+                // Only poll on attach
+                self.connected = is_connected();
+            }
+            Event::USB(USBEvent::Configured) => {
+                self.connected = true;
+            }
+            Event::USB(USBEvent::Deconfigured) => {
+                // Only update if BLE is also disconnected
+                #[cfg(feature = "ble")]
+                {
+                    self.connected = ble::is_connected();
+                }
+                #[cfg(not(feature = "ble"))]
+                {
+                    self.connected = false;
+                }
+            }
+            #[cfg(feature = "ble")]
+            Event::BLE(BLEEvent::Connected) => {
+                self.connected = true;
+            }
+            #[cfg(feature = "ble")]
+            Event::BLE(BLEEvent::Disconnected) => {
+                // Only update if USB is also disconnected
+                self.connected = usb::usb_configured();
+            }
+            _ => {}
+        }
+        if self.connected != old_connected {
+            ctx.request_paint();
+            Some(())
+        } else {
+            None
+        }
+    }
+
+    fn render<'s>(&'s self, target: &mut impl Renderer<'s>) {
+        if self.connected {
+            render_connected_indicator(self.area.center(), target);
+        }
+    }
+}
+
+fn is_connected() -> bool {
+    let connected = usb::usb_configured();
+    #[cfg(feature = "ble")]
+    let connected = connected | ble::is_connected();
+    connected
+}
+
+#[cfg(feature = "ui_debug")]
+impl crate::trace::Trace for ConnectionIndicator {
+    fn trace(&self, t: &mut dyn crate::trace::Tracer) {
+        t.component("ConnectionIndicator");
+        t.bool("connected", self.connected);
+    }
+}
diff --git a/core/embed/rust/src/ui/layout_eckhart/component/mod.rs b/core/embed/rust/src/ui/layout_eckhart/component/mod.rs
index 51a90b25..8cff579c 100644
--- a/core/embed/rust/src/ui/layout_eckhart/component/mod.rs
+++ b/core/embed/rust/src/ui/layout_eckhart/component/mod.rs
@@ -1,4 +1,5 @@
 mod button;
+mod connection_indicator;
 mod error;
 mod fuel_gauge;
 mod update_screen;
@@ -7,6 +8,7 @@ mod welcome_screen;
 pub use button::{
     Button, ButtonContent, ButtonMsg, ButtonStyle, ButtonStyleSheet, HapticMode, IconText,
 };
+pub use connection_indicator::ConnectionIndicator;
 pub use error::ErrorScreen;
 pub use fuel_gauge::FuelGauge;
 pub use update_screen::UpdateScreen;
diff --git a/core/embed/rust/src/ui/layout_eckhart/cshape/connected.rs b/core/embed/rust/src/ui/layout_eckhart/cshape/connected.rs
new file mode 100644
index 00000000..e7d9fbba
--- /dev/null
+++ b/core/embed/rust/src/ui/layout_eckhart/cshape/connected.rs
@@ -0,0 +1,31 @@
+use crate::ui::{
+    display::Color,
+    geometry::{Offset, Point, Rect},
+    shape::{self, Renderer},
+};
+
+use super::super::theme;
+
+// outer circle
+pub const INDICATOR_OUTER_RADIUS: i16 = 10;
+const INDICATOR_OUTER_COLOR: Color = theme::GREEN_BRIGHT;
+
+// inner rectangle
+const INDICATOR_INNER_SIZE: i16 = 9;
+const INDICATOR_INNER_COLOR: Color = theme::GREEN;
+
+pub fn render_connected_indicator<'s>(point: Point, target: &mut impl Renderer<'s>) {
+    shape::Circle::new(point, INDICATOR_OUTER_RADIUS)
+        .with_fg(INDICATOR_OUTER_COLOR)
+        .with_bg(INDICATOR_OUTER_COLOR)
+        .render(target);
+    shape::Bar::new(Rect::snap(
+        point,
+        Offset::uniform(INDICATOR_INNER_SIZE),
+        Alignment2D::CENTER,
+    ))
+    .with_fg(INDICATOR_INNER_COLOR)
+    .with_bg(INDICATOR_INNER_COLOR)
+    .with_radius(1)
+    .render(target);
+}
diff --git a/core/embed/rust/src/ui/layout_eckhart/cshape/mod.rs b/core/embed/rust/src/ui/layout_eckhart/cshape/mod.rs
index e9a27727..2e52f482 100644
--- a/core/embed/rust/src/ui/layout_eckhart/cshape/mod.rs
+++ b/core/embed/rust/src/ui/layout_eckhart/cshape/mod.rs
@@ -1,5 +1,7 @@
+mod connected;
 mod loader;
 mod screen_border;
 
+pub use connected::{render_connected_indicator, INDICATOR_OUTER_RADIUS};
 pub use loader::{render_loader, render_loader_indeterminate};
 pub use screen_border::ScreenBorder;
diff --git a/core/embed/rust/src/ui/layout_eckhart/theme/mod.rs b/core/embed/rust/src/ui/layout_eckhart/theme/mod.rs
index fa96d9af..51b33c6e 100644
--- a/core/embed/rust/src/ui/layout_eckhart/theme/mod.rs
+++ b/core/embed/rust/src/ui/layout_eckhart/theme/mod.rs
@@ -39,6 +39,8 @@ pub const GREEN: Color = Color::rgb(0x08, 0x74, 0x48);
 pub const GREEN_DARK: Color = Color::rgb(0x06, 0x1E, 0x19);
 pub const GREEN_EXTRA_DARK: Color = Color::rgb(0x03, 0x10, 0x0C);
 
+pub const GREEN_BRIGHT: Color = Color::rgb(0x60, 0xE1, 0x98); // used for Connected indicator
+
 pub const ORANGE: Color = Color::rgb(0xFF, 0x63, 0x30);
 pub const ORANGE_DIMMED: Color = Color::rgb(0x9E, 0x57, 0x42);
 pub const ORANGE_DARK: Color = Color::rgb(0x18, 0x0C, 0x0A);