Make payment-request memo names scrollable

### src/rust/bitbox-test-vectors/README.md
@@ -12,6 +12,13 @@ express.
 
 Version expectations and the previous-transaction requirement live on the vector.
 
+Client libraries use these vectors for integration tests against all supported and historical
+firmware versions. When firmware changes an observable outcome or screen transcript, preserve the
+old `VersionExpectation` by closing its range with `max_version_exclusive`, and add a new
+expectation whose `min_version` is the first firmware containing the change. Do not mutate an
+existing open-ended range in a way that changes the expected behavior of historical firmware.
+After changing the Rust constructors, regenerate the canonical JSON as described below.
+
 Explicit derivation paths use canonical `m/...` strings rather than protocol-level integer arrays.
 Confirm and transaction-fee screens include their `longtouch` requirement. Client simulators whose
 stdout protocol omits that flag compare the remaining observable screen fields.

### src/rust/bitbox-test-vectors/src/btc_transaction/cases/screens.rs
@@ -798,7 +798,12 @@ pub fn payment_request_owned_output() -> Vec<VersionExpectation> {
         success(
             Some("9.24.0"),
             Some("9.26.3"),
-            payment_request_screens("0.30000000 TBTC", "0.10000000 TBTC", 50),
+            payment_request_screens(
+                "0.30000000 TBTC",
+                "0.10000000 TBTC",
+                50,
+                "Memo from\n\nTest Merchant",
+            ),
         ),
         invalid_input(Some("9.26.3"), None),
     ]
@@ -855,12 +860,13 @@ fn payment_request_screens(
     total: &str,
     transaction_fee: &str,
     high_fee_percent: u32,
+    memo_from_body: &str,
 ) -> Vec<Screen> {
     vec![
         address("0.20000000 TBTC", "Test Merchant"),
         Screen::Confirm {
             title: "".into(),
-            body: "Memo from\n\nTest Merchant".into(),
+            body: memo_from_body.into(),
             longtouch: false,
         },
         Screen::Confirm {
@@ -884,8 +890,23 @@ pub fn payment_request() -> Vec<VersionExpectation> {
         invalid_input_before("9.24.0"),
         success(
             Some("9.24.0"),
+            Some("9.27.2"),
+            payment_request_screens(
+                "0.50000000 TBTC",
+                "0.30000000 TBTC",
+                150,
+                "Memo from\n\nTest Merchant",
+            ),
+        ),
+        success(
+            Some("9.27.2"),
             None,
-            payment_request_screens("0.50000000 TBTC", "0.30000000 TBTC", 150),
+            payment_request_screens(
+                "0.50000000 TBTC",
+                "0.30000000 TBTC",
+                150,
+                "Memo from: Test Merchant",
+            ),
         ),
     ]
 }

### src/rust/bitbox-test-vectors/testdata/btc-transaction-test-vectors.json
@@ -1335,6 +1335,7 @@
         },
         {
           "min_version": "9.24.0",
+          "max_version_exclusive": "9.27.2",
           "outcome": "success",
           "screens": [
             {
@@ -1378,6 +1379,52 @@
               "body": "confirmed"
             }
           ]
+        },
+        {
+          "min_version": "9.27.2",
+          "outcome": "success",
+          "screens": [
+            {
+              "type": "transaction_address",
+              "amount": "0.20000000 TBTC",
+              "address": "Test Merchant"
+            },
+            {
+              "type": "confirm",
+              "title": "",
+              "body": "Memo from: Test Merchant",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Memo 1/2",
+              "body": "TextMemo line1",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "Memo 2/2",
+              "body": "TextMemo line2",
+              "longtouch": false
+            },
+            {
+              "type": "transaction_fee",
+              "amount": "0.50000000 TBTC",
+              "fee": "0.30000000 TBTC",
+              "longtouch": false
+            },
+            {
+              "type": "confirm",
+              "title": "High fee",
+              "body": "The fee is 150.0%\nthe send amount.\nProceed?",
+              "longtouch": true
+            },
+            {
+              "type": "status",
+              "title": "Transaction",
+              "body": "confirmed"
+            }
+          ]
         }
       ],
       "expected_signatures": [

### src/rust/bitbox02-rust/src/hal/testing/ui.rs
@@ -72,6 +72,7 @@ pub struct TestingUi<'a> {
     _abort_nth: Option<usize>,
     pub screens: Vec<Screen>,
     pub confirm_display_sizes: Vec<usize>,
+    pub confirm_scrollable: Vec<bool>,
     progress_screens: Rc<RefCell<Vec<ProgressScreen>>>,
     _enter_string: Option<EnterStringCb<'a>>,
     _menu: Option<MenuCb<'a>>,
@@ -133,6 +134,7 @@ impl Ui for TestingUi<'_> {
 
     async fn confirm(&mut self, params: &ConfirmParams<'_>) -> Result<(), UserAbort> {
         self.confirm_display_sizes.push(params.display_size);
+        self.confirm_scrollable.push(params.scrollable);
         self.screens.push(Screen::Confirm {
             title: params.title.into(),
             body: params.body.into(),
@@ -301,6 +303,7 @@ impl<'a> TestingUi<'a> {
         Self {
             screens: vec![],
             confirm_display_sizes: vec![],
+            confirm_scrollable: vec![],
             progress_screens: Rc::new(RefCell::new(vec![])),
             _abort_nth: None,
             _enter_string: None,

### src/rust/bitbox02-rust/src/hww/api/payment_request.rs
@@ -152,7 +152,8 @@ pub async fn user_verify(
                 hal.ui()
                     .confirm(&ConfirmParams {
                         title: "",
-                        body: &format!("Memo from\n\n{}", payment_request.recipient_name),
+                        body: &format!("Memo from: {}", payment_request.recipient_name),
+                        scrollable: true,
                         accept_is_nextarrow: true,
                         ..Default::default()
                     })
@@ -1552,7 +1553,7 @@ mod tests {
                 },
                 Screen::Confirm {
                     title: "".into(),
-                    body: "Memo from\n\nPOCKET".into(),
+                    body: "Memo from: POCKET".into(),
                     longtouch: false,
                 },
                 Screen::Confirm {
@@ -1562,6 +1563,36 @@ mod tests {
                 },
             ]
         );
+        assert_eq!(mock_hal.ui.confirm_scrollable, vec![true, true]);
+    }
+
+    #[async_test::test]
+    async fn test_user_verify_long_recipient_name_scrollable() {
+        let recipient_name = format!("SWAPKIT ({})", "a".repeat(200));
+        let mut mock_hal = TestingHal::new();
+        user_verify(
+            &mut mock_hal,
+            &pb::BtcPaymentRequestRequest {
+                recipient_name: recipient_name.clone(),
+                memos: vec![make_text_memo("Swap memo")],
+                nonce: vec![],
+                total_amount: 1234567890,
+                signature: vec![],
+            },
+            "12.34567890 BTC",
+        )
+        .await
+        .unwrap();
+
+        assert_eq!(
+            mock_hal.ui.screens[1],
+            Screen::Confirm {
+                title: "".into(),
+                body: format!("Memo from: {recipient_name}"),
+                longtouch: false,
+            }
+        );
+        assert!(mock_hal.ui.confirm_scrollable[0]);
     }
 
     #[cfg(feature = "app-ethereum")]

### versions.json
@@ -1,5 +1,5 @@
 {
-  "firmware": "v9.27.1",
+  "firmware": "v9.27.2",
   "bootloader": "v1.2.2",
   "stage0": 1
 }