feat(core/eckhart): haptic feedback for HTC animation

diff --git a/core/embed/rust/src/ui/layout_eckhart/firmware/action_bar.rs b/core/embed/rust/src/ui/layout_eckhart/firmware/action_bar.rs
index c5cdb43c..5ea07de6 100644
--- a/core/embed/rust/src/ui/layout_eckhart/firmware/action_bar.rs
+++ b/core/embed/rust/src/ui/layout_eckhart/firmware/action_bar.rs
@@ -10,6 +10,9 @@ use crate::{
     },
 };
 
+#[cfg(feature = "haptic")]
+use crate::trezorhal::haptic::{self, HapticEffect};
+
 use super::{
     super::component::{Button, ButtonMsg},
     theme, HoldToConfirmAnim,
@@ -267,6 +270,8 @@ impl ActionBar {
                     ctx.enable_swipe();
                 } else {
                     // Animations disabled, return confirmed
+                    #[cfg(feature = "haptic")]
+                    haptic::play(HapticEffect::HoldToConfirm);
                     return Some(ActionBarMsg::Confirmed);
                 }
             }
@@ -278,7 +283,12 @@ impl ActionBar {
                     ctx.enable_swipe();
                 }
             }
-            (ButtonMsg::Clicked, false) | (ButtonMsg::LongPressed, true) => {
+            (ButtonMsg::LongPressed, true) => {
+                #[cfg(feature = "haptic")]
+                haptic::play(HapticEffect::HoldToConfirm);
+                return Some(ActionBarMsg::Confirmed);
+            }
+            (ButtonMsg::Clicked, false) => {
                 return Some(ActionBarMsg::Confirmed);
             }
             _ => {}
diff --git a/core/embed/rust/src/ui/layout_eckhart/firmware/hold_to_confirm.rs b/core/embed/rust/src/ui/layout_eckhart/firmware/hold_to_confirm.rs
index ab3ba1d1..20b2d840 100644
--- a/core/embed/rust/src/ui/layout_eckhart/firmware/hold_to_confirm.rs
+++ b/core/embed/rust/src/ui/layout_eckhart/firmware/hold_to_confirm.rs
@@ -15,6 +15,12 @@ use super::{
     constant::SCREEN,
 };
 
+#[cfg(feature = "haptic")]
+use pareen;
+
+#[cfg(feature = "haptic")]
+use crate::trezorhal::haptic;
+
 /// A component that displays a border that grows from the bottom of the screen
 /// to the top. The animation is parametrizable by color and duration.
 pub struct HoldToConfirmAnim {
@@ -145,13 +151,17 @@ impl Component for HoldToConfirmAnim {
 
         // Growing animation
         if self.is_active() {
+            let elapsed = self.timer.elapsed();
             // override header with custom text
-            if self.timer.elapsed() > Self::HEADER_OVERLAY_DELAY {
+            if elapsed > Self::HEADER_OVERLAY_DELAY {
                 self.render_header_overlay(target);
             }
             // growing border
-            let (clip, top_gap) = self.get_clips(self.timer.elapsed());
+            let (clip, top_gap) = self.get_clips(elapsed);
             self.render_clipped_border(clip, top_gap, u8::MAX, target);
+
+            #[cfg(feature = "haptic")]
+            haptic::play_custom(self.get_haptic(elapsed), 100);
         }
     }
 }
@@ -290,6 +300,23 @@ impl HoldToConfirmAnim {
             _ => (SCREEN, TOP_GAP_ZERO),
         }
     }
+
+    #[cfg(feature = "haptic")]
+    fn get_haptic(&self, elapsed: Duration) -> i8 {
+        // Normalize elapsed time
+        let progress = (elapsed / self.total_duration).clamp(0.0, 1.0);
+
+        // Create a linear easing from 0.0 to 1.0 over normalized progress
+        let ease = pareen::constant(0.0).seq_ease_in(
+            0.0,
+            easer::functions::Linear,
+            1.0,
+            pareen::constant(1.0),
+        );
+
+        // Scale eased value to 0–100
+        (100.0 * ease.eval(progress)) as i8
+    }
 }
 
 #[cfg(test)]