feat(core): allow disabling button on Eckhart `show_info()` layout

diff --git a/core/embed/rust/src/ui/api/firmware_micropython.rs b/core/embed/rust/src/ui/api/firmware_micropython.rs
index 572b240b..74870643 100644
--- a/core/embed/rust/src/ui/api/firmware_micropython.rs
+++ b/core/embed/rust/src/ui/api/firmware_micropython.rs
@@ -1071,7 +1071,15 @@ extern "C" fn new_show_info(n_args: usize, args: *const Obj, kwargs: *mut Map) -
     let block = move |_args: &[Obj], kwargs: &Map| {
         let title: TString = kwargs.get(Qstr::MP_QSTR_title)?.try_into()?;
         let description: TString = kwargs.get(Qstr::MP_QSTR_description)?.try_into()?;
-        let button: TString = kwargs.get_or(Qstr::MP_QSTR_button, TString::empty())?;
+        let button = kwargs
+            .get(Qstr::MP_QSTR_button)
+            .unwrap_or_else(|_| Obj::const_none())
+            .try_into_option::<Obj>()?
+            .map(|obj| -> Result<(TString<'_>, bool), Error> {
+                let [text, enabled]: [Obj; 2] = util::iter_into_array(obj)?;
+                Ok((text.try_into()?, enabled.try_into()?))
+            })
+            .transpose()?;
         let time_ms: u32 = kwargs.get_or(Qstr::MP_QSTR_time_ms, 0)?.try_into()?;
 
         let obj = ModelUI::show_info(title, description, button, time_ms)?;
@@ -2012,7 +2020,7 @@ pub static mp_module_trezorui_api: Module = obj_module! {
     ///     *,
     ///     title: str,
     ///     description: str = "",
-    ///     button: str = "",
+    ///     button: tuple[str, bool] | None = None,
     ///     time_ms: int = 0,
     /// ) -> LayoutObj[UiResult]:
     ///     """Info screen."""
diff --git a/core/embed/rust/src/ui/layout_bolt/ui_firmware.rs b/core/embed/rust/src/ui/layout_bolt/ui_firmware.rs
index ca7cb298..2cd73aaf 100644
--- a/core/embed/rust/src/ui/layout_bolt/ui_firmware.rs
+++ b/core/embed/rust/src/ui/layout_bolt/ui_firmware.rs
@@ -884,7 +884,7 @@ impl FirmwareUI for UIBolt {
             title,
             TString::empty(),
             description,
-            button,
+            (!button.is_empty()).then_some(button),
             allow_cancel,
             time_ms,
             icon,
@@ -990,13 +990,17 @@ impl FirmwareUI for UIBolt {
     fn show_info(
         title: TString<'static>,
         description: TString<'static>,
-        button: TString<'static>,
+        button: Option<(TString<'static>, bool)>,
         time_ms: u32,
     ) -> Result<Gc<LayoutObj>, Error> {
-        assert!(
-            !button.is_empty() || time_ms > 0,
-            "either button or timeout must be set"
-        );
+        let button_text = match (button, time_ms) {
+            // either button or timeout must be set
+            (None, 0) => return Err(Error::NotImplementedError),
+            (None, _) => None,
+            // disabled buttons are not supported on Bolt
+            (Some((_, false)), _) => return Err(Error::NotImplementedError),
+            (Some((text, true)), _) => Some(text),
+        };
 
         let icon = BlendedImage::new(
             theme::IMAGE_BG_CIRCLE,
@@ -1009,7 +1013,7 @@ impl FirmwareUI for UIBolt {
             title,
             TString::empty(),
             description,
-            button,
+            button_text,
             false,
             time_ms,
             icon,
@@ -1247,7 +1251,7 @@ impl FirmwareUI for UIBolt {
             title,
             TString::empty(),
             description,
-            button,
+            (!button.is_empty()).then_some(button),
             allow_cancel,
             time_ms,
             icon,
@@ -1280,7 +1284,7 @@ impl FirmwareUI for UIBolt {
             title,
             value,
             description,
-            button,
+            (!button.is_empty()).then_some(button),
             allow_cancel,
             0,
             icon,
@@ -1302,62 +1306,70 @@ fn new_show_modal(
     title: TString<'static>,
     value: TString<'static>,
     description: TString<'static>,
-    button: TString<'static>,
+    button: Option<TString<'static>>,
     allow_cancel: bool,
     time_ms: u32,
     icon: BlendedImage,
     button_style: ButtonStyleSheet,
 ) -> Result<Gc<LayoutObj>, Error> {
-    let no_buttons = button.is_empty();
-    let obj = if no_buttons && time_ms == 0 {
-        // No buttons and no timer, used when we only want to draw the dialog once and
-        // then throw away the layout object.
-        LayoutObj::new(
-            IconDialog::new(icon, title, Empty)
-                .with_value(value)
-                .with_description(description),
-        )?
-    } else if no_buttons && time_ms > 0 {
-        // Timeout, no buttons.
-        LayoutObj::new(
-            IconDialog::new(
-                icon,
-                title,
-                Timeout::new(time_ms).map(|_| Some(CancelConfirmMsg::Confirmed)),
-            )
-            .with_value(value)
-            .with_description(description),
-        )?
-    } else if allow_cancel {
-        // Two buttons.
-        LayoutObj::new(
-            IconDialog::new(
-                icon,
-                title,
-                Button::cancel_confirm(
-                    Button::with_icon(theme::ICON_CANCEL),
-                    Button::with_text(button).styled(button_style),
-                    false,
-                ),
-            )
-            .with_value(value)
-            .with_description(description),
-        )?
-    } else {
-        // Single button.
-        LayoutObj::new(
-            IconDialog::new(
-                icon,
-                title,
-                theme::button_bar(Button::with_text(button).styled(button_style).map(|msg| {
-                    (matches!(msg, ButtonMsg::Clicked)).then(|| CancelConfirmMsg::Confirmed)
-                })),
-            )
-            .with_value(value)
-            .with_description(description),
-        )?
+    let obj = match button {
+        None => {
+            if time_ms == 0 {
+                // No buttons and no timer, used when we only want to draw the dialog once and
+                // then throw away the layout object.
+                LayoutObj::new(
+                    IconDialog::new(icon, title, Empty)
+                        .with_value(value)
+                        .with_description(description),
+                )?
+            } else {
+                // Timeout, no buttons.
+                LayoutObj::new(
+                    IconDialog::new(
+                        icon,
+                        title,
+                        Timeout::new(time_ms).map(|_| Some(CancelConfirmMsg::Confirmed)),
+                    )
+                    .with_value(value)
+                    .with_description(description),
+                )?
+            }
+        }
+        Some(button) => {
+            if allow_cancel {
+                // Two buttons.
+                LayoutObj::new(
+                    IconDialog::new(
+                        icon,
+                        title,
+                        Button::cancel_confirm(
+                            Button::with_icon(theme::ICON_CANCEL),
+                            Button::with_text(button).styled(button_style),
+                            false,
+                        ),
+                    )
+                    .with_value(value)
+                    .with_description(description),
+                )?
+            } else {
+                // Single button.
+                LayoutObj::new(
+                    IconDialog::new(
+                        icon,
+                        title,
+                        theme::button_bar(Button::with_text(button).styled(button_style).map(
+                            |msg| {
+                                (matches!(msg, ButtonMsg::Clicked))
+                                    .then(|| CancelConfirmMsg::Confirmed)
+                            },
+                        )),
+                    )
+                    .with_value(value)
+                    .with_description(description),
+                )?
+            }
+        }
     };
-
     Ok(obj)
 }
 
diff --git a/core/embed/rust/src/ui/layout_caesar/ui_firmware.rs b/core/embed/rust/src/ui/layout_caesar/ui_firmware.rs
index ae5566c6..cca9e3cf 100644
--- a/core/embed/rust/src/ui/layout_caesar/ui_firmware.rs
+++ b/core/embed/rust/src/ui/layout_caesar/ui_firmware.rs
@@ -1173,7 +1173,7 @@ impl FirmwareUI for UICaesar {
     fn show_info(
         title: TString<'static>,
         description: TString<'static>,
-        _button: TString<'static>,
+        _button: Option<(TString<'static>, bool)>,
         time_ms: u32,
     ) -> Result<Gc<LayoutObj>, Error> {
         let content = Frame::new(
diff --git a/core/embed/rust/src/ui/layout_delizia/ui_firmware.rs b/core/embed/rust/src/ui/layout_delizia/ui_firmware.rs
index 4f0bf0fd..9069f2b6 100644
--- a/core/embed/rust/src/ui/layout_delizia/ui_firmware.rs
+++ b/core/embed/rust/src/ui/layout_delizia/ui_firmware.rs
@@ -971,7 +971,7 @@ impl FirmwareUI for UIDelizia {
     fn show_info(
         title: TString<'static>,
         description: TString<'static>,
-        _button: TString<'static>,
+        _button: Option<(TString<'static>, bool)>,
         _time_ms: u32,
     ) -> Result<Gc<LayoutObj>, Error> {
         let content = Paragraphs::new(Paragraph::new(&theme::TEXT_MAIN_GREY_LIGHT, description));
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 ac3935ed..524d8f60 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
@@ -79,7 +79,8 @@ impl ActionBar {
     /// paginated content.
     pub fn new_single(button: Button) -> Self {
         let mut right_button = button.with_expanded_touch_area(Self::BUTTON_EXPAND_TOUCH);
-        if right_button.stylesheet() == &theme::button_default() {
+        // If the button is disabled, don't override its stylesheet.
+        if right_button.is_enabled() && right_button.stylesheet() == &theme::button_default() {
             right_button = right_button.styled(theme::firmware::button_actionbar_right_default());
         };
         if !right_button.has_gradient() {
diff --git a/core/embed/rust/src/ui/layout_eckhart/ui_firmware.rs b/core/embed/rust/src/ui/layout_eckhart/ui_firmware.rs
index a6486171..7e331736 100644
--- a/core/embed/rust/src/ui/layout_eckhart/ui_firmware.rs
+++ b/core/embed/rust/src/ui/layout_eckhart/ui_firmware.rs
@@ -1233,15 +1233,18 @@ impl FirmwareUI for UIEckhart {
     fn show_info(
         title: TString<'static>,
         description: TString<'static>,
-        button: TString<'static>,
+        button: Option<(TString<'static>, bool)>,
         _time_ms: u32,
     ) -> Result<Gc<LayoutObj>, Error> {
         let content = Paragraphs::new(Paragraph::new(&theme::TEXT_REGULAR, description))
             .with_placement(LinearPlacement::vertical());
 
+        let button = button.map_or_else(Button::empty, |(text, enabled)| {
+            Button::with_text(text).initially_enabled(enabled)
+        });
         let screen = TextScreen::new(content)
             .with_header(Header::new(title))
-            .with_action_bar(ActionBar::new_single(Button::with_text(button)));
+            .with_action_bar(ActionBar::new_single(button));
         let obj = LayoutObj::new(screen)?;
         Ok(obj)
     }
diff --git a/core/embed/rust/src/ui/ui_firmware.rs b/core/embed/rust/src/ui/ui_firmware.rs
index db6cd480..46ecb858 100644
--- a/core/embed/rust/src/ui/ui_firmware.rs
+++ b/core/embed/rust/src/ui/ui_firmware.rs
@@ -385,7 +385,7 @@ pub trait FirmwareUI {
     fn show_info(
         title: TString<'static>,
         description: TString<'static>,
-        button: TString<'static>,
+        button: Option<(TString<'static>, bool)>,
         time_ms: u32,
     ) -> Result<Gc<LayoutObj>, Error>; // TODO: return LayoutMaybeTrace
 
diff --git a/core/mocks/generated/trezorui_api.pyi b/core/mocks/generated/trezorui_api.pyi
index 1c794394..8c1d4594 100644
--- a/core/mocks/generated/trezorui_api.pyi
+++ b/core/mocks/generated/trezorui_api.pyi
@@ -691,7 +691,7 @@ def show_info(
     *,
     title: str,
     description: str = "",
-    button: str = "",
+    button: tuple[str, bool] | None = None,
     time_ms: int = 0,
 ) -> LayoutObj[UiResult]:
     """Info screen."""
diff --git a/core/src/trezor/ui/layouts/bolt/reset.py b/core/src/trezor/ui/layouts/bolt/reset.py
index b77997cf..5d47250e 100644
--- a/core/src/trezor/ui/layouts/bolt/reset.py
+++ b/core/src/trezor/ui/layouts/bolt/reset.py
@@ -289,7 +289,7 @@ def show_intro_backup(num_of_words: int | None) -> Awaitable[None]:
         trezorui_api.show_info(
             title="",
             description=description,
-            button=TR.buttons__continue,
+            button=(TR.buttons__continue, True),
         ),
         "backup_intro",
         ButtonRequestType.ResetDevice,
@@ -301,7 +301,7 @@ def show_warning_backup() -> Awaitable[trezorui_api.UiResult]:
         trezorui_api.show_info(
             title=TR.reset__never_make_digital_copy,
             description="",
-            button=TR.buttons__ok_i_understand,
+            button=(TR.buttons__ok_i_understand, True),
         ),
         "backup_warning",
         ButtonRequestType.ResetDevice,
diff --git a/core/src/trezor/ui/layouts/eckhart/reset.py b/core/src/trezor/ui/layouts/eckhart/reset.py
index 64d68392..a9468d67 100644
--- a/core/src/trezor/ui/layouts/eckhart/reset.py
+++ b/core/src/trezor/ui/layouts/eckhart/reset.py
@@ -316,7 +316,7 @@ async def show_intro_backup(num_of_words: int | None) -> None:
         trezorui_api.show_info(
             title=TR.reset__recovery_wallet_backup_title,
             description=description,
-            button=TR.buttons__continue,
+            button=(TR.buttons__continue, True),
         ),
         "backup_intro",
         ButtonRequestType.ResetDevice,