fix(core): improve confirmation UX in super-shamir

### core/.changelog.d/7678.fixed
@@ -0,0 +1 @@
+Show the group threshold and individual groups thresholds in Advanced Shamir backup.

### core/embed/rust/librust_qstr.h
@@ -157,7 +157,9 @@ static void _librust_qstrs(void) {
   MP_QSTR_backlight_set;
   MP_QSTR_backup__can_back_up_anytime;
   MP_QSTR_backup__create_backup_to_prevent_loss;
+  MP_QSTR_backup__info_multi_group_backup;
   MP_QSTR_backup__info_multi_share_backup;
+  MP_QSTR_backup__info_n_of_m_template;
   MP_QSTR_backup__info_single_share_backup;
   MP_QSTR_backup__it_should_be_backed_up;
   MP_QSTR_backup__it_should_be_backed_up_now;

### core/embed/rust/src/translations/generated/translated_string.rs
[binary or diff unavailable]

### core/mocks/trezortranslate_keys.pyi
@@ -37,7 +37,9 @@ class TR:
     auto_lock__title: str = "Auto-lock delay"
     backup__can_back_up_anytime: str = "You can back up your Trezor once, at any time."
     backup__create_backup_to_prevent_loss: str = "Create a wallet backup to avoid losing access to your funds."
+    backup__info_multi_group_backup: str = "Your wallet backup contains {0} groups with a group threshold of {1}."
     backup__info_multi_share_backup: str = "Your wallet backup contains multiple lists of words in a specific order (shares)."
+    backup__info_n_of_m_template: str = "{0}-of-{1}"
     backup__info_single_share_backup: str = "Your wallet backup contains {0} words in a specific order."
     backup__it_should_be_backed_up: str = "You should back up your new wallet right now."
     backup__it_should_be_backed_up_now: str = "It should be backed up now!"

### core/src/apps/management/reset_device/__init__.py
@@ -6,7 +6,7 @@
 from trezor import TR
 from trezor.crypto import hmac, slip39
 from trezor.enums import BackupType, MessageType
-from trezor.ui.layouts import confirm_action
+from trezor.ui.layouts import BR_CODE_OTHER, confirm_action, confirm_properties
 from trezor.wire import ProcessError
 
 from apps.common import backup_types
@@ -21,6 +21,7 @@
     from buffer_types import AnyBytes
 
     from trezor.messages import ResetDevice, Success
+    from trezor.ui.layouts import PropertyType
 
 
 BAK_T_BIP39 = BackupType.Bip39  # global_import_cache
@@ -292,17 +293,42 @@ async def backup_slip39_custom(
         mnemonics = _get_slip39_mnemonics(
             encrypted_master_secret, group_threshold, groups, extendable
         )
-        await confirm_action(
-            "warning_shamir_backup",
-            TR.reset__title_shamir_backup,
-            description=TR.reset__create_x_of_y_multi_share_backup_template.format(
-                groups[0][0], groups[0][1]
-            ),
-            verb=TR.buttons__continue,
-        )
         if len(groups) == 1:
+            await confirm_action(
+                "warning_shamir_backup",
+                TR.reset__title_shamir_backup,
+                description=TR.reset__create_x_of_y_multi_share_backup_template.format(
+                    groups[0][0], groups[0][1]
+                ),
+                verb=TR.buttons__continue,
+            )
             await layout.slip39_basic_show_and_confirm_shares(handler, mnemonics[0])
         else:
+            await confirm_action(
+                "warning_shamir_advanced_backup",
+                TR.reset__recovery_wallet_backup_title,
+                description=TR.backup__info_multi_group_backup.format(
+                    len(groups), group_threshold
+                ),
+                verb=TR.buttons__continue,
+            )
+
+            props: list[PropertyType] = []
+            for idx, (threshold, n_group) in enumerate(groups):
+                props.append(
+                    (
+                        TR.recovery__group_num_template.format(idx + 1),
+                        TR.backup__info_n_of_m_template.format(threshold, n_group),
+                        False,
+                    )
+                )
+            await confirm_properties(
+                "shamir_advanced_backup_groups",
+                TR.reset__recovery_wallet_backup_title,
+                props,
+                br_code=BR_CODE_OTHER,
+                verb=TR.buttons__continue,
+            )
             await layout.slip39_advanced_show_and_confirm_shares(handler, mnemonics)
 
 

### core/translations/blank_translations_rules.json
@@ -137,7 +137,6 @@
       "pin__enabled",
       "progress__locking_device",
       "recovery__enter_different_share",
-      "recovery__group_num_template",
       "recovery__you_have_entered",
       "reset__more_info_at",
       "reset__select_word_x_of_y_template",

### core/translations/cs.json
@@ -136,7 +136,9 @@
       "Delizia": "Vytvořte si zálohu peněženky, abyste neztratili přístup ke svým prostředkům.",
       "Eckhart": "Vytvořte si zálohu peněženky, abyste neztratili přístup ke svým prostředkům."
     },
+    "backup__info_multi_group_backup": "Vaše záloha peněženky obsahuje {0} skupin s prahem skupiny {1}.",
     "backup__info_multi_share_backup": "Vaše záloha peněženky obsahuje několik seznamů slov v určitém pořadí (podílů).",
+    "backup__info_n_of_m_template": "{0}-z-{1}",
     "backup__info_single_share_backup": "Vaše záloha peněženky obsahuje {0} slov v určitém pořadí.",
     "backup__it_should_be_backed_up": {
       "Bolt": "Novou peněženku byste si měli ihned zálohovat.",
@@ -1979,12 +1981,7 @@
     },
     "recovery__enter_each_word": "Zadejte popořadě všechna slova vaší zálohy peněženky.",
     "recovery__enter_share_from_diff_group": "Zadejte podíl z jiné skupiny.",
-    "recovery__group_num_template": {
-      "Bolt": "Skupiny {0}",
-      "Caesar": "Skupiny {0}",
-      "Delizia": "Skupiny {0}",
-      "Eckhart": ""
-    },
+    "recovery__group_num_template": "Skupiny {0}",
     "recovery__group_threshold_reached": "Práh skupiny dosažen.",
     "recovery__invalid_share_entered": "Zadali jste neplatný podíl zálohy.",
     "recovery__invalid_wallet_backup_entered": "Zadali jste neplatnou zálohu.",

### core/translations/de.json
@@ -146,7 +146,9 @@
       "Delizia": "Erstelle ein Backup, um den Zugriff auf deine Assets nicht zu verlieren.",
       "Eckhart": "Erstelle ein Backup, um den Zugriff auf deine Assets nicht zu verlieren."
     },
+    "backup__info_multi_group_backup": "Dein Wallet-Backup enthält {0} Gruppen mit einem Gruppen-Schwellenwert von {1}.",
     "backup__info_multi_share_backup": "Dein Wallet-Backup enthält mehrere Listen von Wörtern in einer bestimmten Reihenfolge (Shares).",
+    "backup__info_n_of_m_template": "{0}-von-{1}",
     "backup__info_single_share_backup": "Dein Wallet-Backup enthält {0} Wörter in einer bestimmten Reihenfolge.",
     "backup__it_should_be_backed_up": {
       "Bolt": "Du solltest jetzt dein neues Wallet sichern.",
@@ -2264,12 +2266,7 @@
     },
     "recovery__enter_each_word": "Gib jedes Wort aus deinem Wallet-Backup nacheinander ein.",
     "recovery__enter_share_from_diff_group": "Share von anderer Gruppe eingeben.",
-    "recovery__group_num_template": {
-      "Bolt": "Gruppe {0}",
-      "Caesar": "Gruppe {0}",
-      "Delizia": "Gruppe {0}",
-      "Eckhart": ""
-    },
+    "recovery__group_num_template": "Gruppe {0}",
     "recovery__group_threshold_reached": "Gruppenschwelle wurde erreicht.",
     "recovery__invalid_share_entered": "Eingegebener Recovery Share ist ungültig.",
     "recovery__invalid_wallet_backup_entered": "Eingegebener Recovery Seed ist ungültig.",

### core/translations/en.json
@@ -104,7 +104,9 @@
       "Delizia": "Create a wallet backup to avoid losing access to your funds.",
       "Eckhart": "Create a wallet backup to avoid losing access to your funds."
     },
+    "backup__info_multi_group_backup": "Your wallet backup contains {0} groups with a group threshold of {1}.",
     "backup__info_multi_share_backup": "Your wallet backup contains multiple lists of words in a specific order (shares).",
+    "backup__info_n_of_m_template": "{0}-of-{1}",
     "backup__info_single_share_backup": "Your wallet backup contains {0} words in a specific order.",
     "backup__it_should_be_backed_up": {
       "Bolt": "You should back up your new wallet right now.",
@@ -1987,12 +1989,7 @@
     },
     "recovery__enter_each_word": "Enter each word of your wallet backup in order.",
     "recovery__enter_share_from_diff_group": "Enter share from a different group.",
-    "recovery__group_num_template": {
-      "Bolt": "Group {0}",
-      "Caesar": "Group {0}",
-      "Delizia": "Group {0}",
-      "Eckhart": ""
-    },
+    "recovery__group_num_template": "Group {0}",
     "recovery__group_threshold_reached": "Group threshold reached.",
     "recovery__invalid_share_entered": "Invalid recovery share entered.",
     "recovery__invalid_wallet_backup_entered": "Invalid wallet backup entered.",

### core/translations/es.json
@@ -141,7 +141,9 @@
       "Delizia": "Crea una c. seg. para evitar perder el acceso a tus fondos.",
       "Eckhart": "Crea una c. seg. para evitar perder el acceso a tus fondos."
     },
+    "backup__info_multi_group_backup": "La c. seg. de la billetera contiene {0} grupos con un umbral de grupo de {1}.",
     "backup__info_multi_share_backup": "La c. seg. de la billetera contiene varias listas de palabras en un orden concreto (partes).",
+    "backup__info_n_of_m_template": "{0}-de-{1}",
     "backup__info_single_share_backup": "La c. seg. de la billetera contiene {0} palabras en un orden concreto.",
     "backup__it_should_be_backed_up": {
       "Bolt": "Debes realizar una c. seg. de tu billetera.",
@@ -1979,12 +1981,7 @@
     },
     "recovery__enter_each_word": "Introduce cada palabra de la c. seg. de la billetera en orden.",
     "recovery__enter_share_from_diff_group": "Introduce una parte de otro grupo.",
-    "recovery__group_num_template": {
-      "Bolt": "Grupo {0}",
-      "Caesar": "Grupo {0}",
-      "Delizia": "Grupo {0}",
-      "Eckhart": ""
-    },
+    "recovery__group_num_template": "Grupo {0}",
     "recovery__group_threshold_reached": "Umbral de grupo alcanzado.",
     "recovery__invalid_share_entered": "La parte de recuperación es inválida.",
     "recovery__invalid_wallet_backup_entered": "La c. seg. de la billetera es inválida.",

### core/translations/fr.json
@@ -166,12 +166,14 @@
       "Delizia": "Créez une sauvegarde pour éviter de perdre l'accès à vos fonds.",
       "Eckhart": "Créez une sauvegarde pour éviter de perdre l'accès à vos fonds."
     },
+    "backup__info_multi_group_backup": "Votre sauvegarde de portefeuille contient {0} groupes avec un seuil de groupe de {1}.",
     "backup__info_multi_share_backup": {
       "Bolt": "La sauvegarde contient plusieurs listes dans un ordre spécifique (fragments).",
       "Caesar": "La sauvegarde contient plusieurs listes dans un ordre spécifique (fragments).",
       "Delizia": "Votre sauvegarde de portefeuille contient plusieurs listes de mots dans un ordre spécifique (fragments).",
       "Eckhart": "Votre sauvegarde de portefeuille contient plusieurs listes de mots dans un ordre spécifique (fragments)."
     },
+    "backup__info_n_of_m_template": "{0}-sur-{1}",
     "backup__info_single_share_backup": "Votre sauvegarde de portefeuille contient {0} mots dans un ordre spécifique.",
     "backup__it_should_be_backed_up": {
       "Bolt": "Sauvegardez-le dès maintenant.",
@@ -2184,12 +2186,7 @@
       "Eckhart": "Saisissez chaque mot de la sauvegarde de votre portefeuille dans l'ordre."
     },
     "recovery__enter_share_from_diff_group": "Saisissez un fragment d'un autre groupe.",
-    "recovery__group_num_template": {
-      "Bolt": "Groupe {0}",
-      "Caesar": "Groupe {0}",
-      "Delizia": "Groupe {0}",
-      "Eckhart": ""
-    },
+    "recovery__group_num_template": "Groupe {0}",
     "recovery__group_threshold_reached": "Seuil de groupe atteint.",
     "recovery__invalid_share_entered": "Fragment de récupération saisi invalide.",
     "recovery__invalid_wallet_backup_entered": "Sauvegarde de portefeuille saisie invalide.",

### core/translations/order.json
@@ -1282,5 +1282,7 @@
   "1280": "stellar__spender",
   "1281": "stellar__to",
   "1282": "stellar__token_contract",
-  "1283": "stellar__transfer_token"
+  "1283": "stellar__transfer_token",
+  "1284": "backup__info_multi_group_backup",
+  "1285": "backup__info_n_of_m_template"
 }

### core/translations/pt.json
@@ -146,12 +146,14 @@
       "Delizia": "Crie um backup de carteira para evitar perder acesso aos seus fundos.",
       "Eckhart": "Crie um backup de carteira para evitar perder acesso aos seus fundos."
     },
+    "backup__info_multi_group_backup": "O backup da sua carteira contém {0} grupos com um limite de grupo de {1}.",
     "backup__info_multi_share_backup": {
       "Bolt": "O backup contém listas de palavras em uma ordem específica (shares).",
       "Caesar": "O backup da sua carteira contém diversas listas de palavras em uma ordem específica (shares).",
       "Delizia": "O backup da sua carteira contém diversas listas de palavras em uma ordem específica (shares).",
       "Eckhart": "O backup da sua carteira contém diversas listas de palavras em uma ordem específica (shares)."
     },
+    "backup__info_n_of_m_template": "{0}-de-{1}",
     "backup__info_single_share_backup": "O backup da sua carteira contém {0} palavras em uma ordem específica.",
     "backup__it_should_be_backed_up": {
       "Bolt": "Você deve fazer o backup da sua nova carteira agora.",
@@ -2049,12 +2051,7 @@
     },
     "recovery__enter_each_word": "Insira, em ordem, cada palavra do backup da sua carteira.",
     "recovery__enter_share_from_diff_group": "Insira um share de um grupo diferente.",
-    "recovery__group_num_template": {
-      "Bolt": "Grupo {0}",
-      "Caesar": "Grupo {0}",
-      "Delizia": "Grupo {0}",
-      "Eckhart": ""
-    },
+    "recovery__group_num_template": "Grupo {0}",
     "recovery__group_threshold_reached": "Limite mínimo do grupo atingido.",
     "recovery__invalid_share_entered": "O share de recuperação inserido é inválido.",
     "recovery__invalid_wallet_backup_entered": "O backup de carteira inserido é inválido.",

### core/translations/signatures.json
@@ -1,8 +1,8 @@
 {
   "current": {
-    "merkle_root": "db7c15eb241cdf0ee77b32ccc2379168f8e93c47621dbcfa0617c57d8fae2384",
-    "datetime": "2026-08-25T13:51:31.686844+00:00",
-    "commit": "81915a0fd96ba810a971a4d051b7829c9a55b0b2"
+    "merkle_root": "94bf8d929cb0d24b92c87ff8f8efc00aee41fb9ef5f6482e1c908ad9605ff768",
+    "datetime": "2026-08-25T15:56:41.250312+00:00",
+    "commit": "4b96a3119828c6862308a52bf3b50c3c73d2d372"
   },
   "history": [
     {