feat(common): add network definition support for `EthereumSignAuth7702`

diff --git a/common/protob/messages-ethereum.proto b/common/protob/messages-ethereum.proto
index e6cdb28d..c87ac21d 100644
--- a/common/protob/messages-ethereum.proto
+++ b/common/protob/messages-ethereum.proto
@@ -232,10 +232,11 @@ message EthereumDefinitions {
 message EthereumSignAuth7702 {
     option (experimental_message) = true;
 
-    repeated uint32 address_n = 1;  // BIP-32 path to derive the key from master node
-    required uint64 chain_id = 2;   // chain id on which the authorization is valid, or 0 for all
-    required string delegate = 3;   // address of the code that will be delegated to the EOA
-    required uint64 nonce = 4;      // account nonce for which the authorization is valid
+    repeated uint32 address_n = 1;                 // BIP-32 path to derive the key from master node
+    required uint64 chain_id = 2;                  // chain id on which the authorization is valid, or 0 for all
+    required string delegate = 3;                  // address of the code that will be delegated to the EOA
+    required uint64 nonce = 4;                     // account nonce for which the authorization is valid
+    optional EthereumDefinitions definitions = 5;  // network definitions (for chain ID)
 }
 
 /**
diff --git a/core/src/trezor/messages.py b/core/src/trezor/messages.py
index 62043346..fdd5a56f 100644
--- a/core/src/trezor/messages.py
+++ b/core/src/trezor/messages.py
@@ -4301,6 +4301,7 @@ if TYPE_CHECKING:
         chain_id: "int"
         delegate: "str"
         nonce: "int"
+        definitions: "EthereumDefinitions | None"
 
         def __init__(
             self,
@@ -4309,6 +4310,7 @@ if TYPE_CHECKING:
             delegate: "str",
             nonce: "int",
             address_n: "list[int] | None" = None,
+            definitions: "EthereumDefinitions | None" = None,
         ) -> None:
             pass
 
diff --git a/python/src/trezorlib/messages.py b/python/src/trezorlib/messages.py
index 0b726ac6..6c53b458 100644
--- a/python/src/trezorlib/messages.py
+++ b/python/src/trezorlib/messages.py
@@ -5889,6 +5889,7 @@ class EthereumSignAuth7702(protobuf.MessageType):
         2: protobuf.Field("chain_id", "uint64", repeated=False, required=True),
         3: protobuf.Field("delegate", "string", repeated=False, required=True),
         4: protobuf.Field("nonce", "uint64", repeated=False, required=True),
+        5: protobuf.Field("definitions", "EthereumDefinitions", repeated=False, required=False, default=None),
     }
 
     def __init__(
@@ -5898,11 +5899,13 @@ class EthereumSignAuth7702(protobuf.MessageType):
         delegate: "str",
         nonce: "int",
         address_n: Optional[Sequence["int"]] = None,
+        definitions: Optional["EthereumDefinitions"] = None,
     ) -> None:
         self.address_n: Sequence["int"] = address_n if address_n is not None else []
         self.chain_id = chain_id
         self.delegate = delegate
         self.nonce = nonce
+        self.definitions = definitions
 
 
 class EthereumAuth7702Signature(protobuf.MessageType):
diff --git a/rust/trezor-client/src/protos/generated/messages_ethereum.rs b/rust/trezor-client/src/protos/generated/messages_ethereum.rs
index 2dda2683..9cd2fb0e 100644
--- a/rust/trezor-client/src/protos/generated/messages_ethereum.rs
+++ b/rust/trezor-client/src/protos/generated/messages_ethereum.rs
@@ -4924,6 +4924,8 @@ pub struct EthereumSignAuth7702 {
     pub delegate: ::std::option::Option<::std::string::String>,
     // @@protoc_insertion_point(field:hw.trezor.messages.ethereum.EthereumSignAuth7702.nonce)
     pub nonce: ::std::option::Option<u64>,
+    // @@protoc_insertion_point(field:hw.trezor.messages.ethereum.EthereumSignAuth7702.definitions)
+    pub definitions: ::protobuf::MessageField<EthereumDefinitions>,
     // special fields
     // @@protoc_insertion_point(special_field:hw.trezor.messages.ethereum.EthereumSignAuth7702.special_fields)
     pub special_fields: ::protobuf::SpecialFields,
@@ -5015,7 +5017,7 @@ impl EthereumSignAuth7702 {
     }
 
     fn generated_message_descriptor_data() -> ::protobuf::reflect::GeneratedMessageDescriptorData {
-        let mut fields = ::std::vec::Vec::with_capacity(4);
+        let mut fields = ::std::vec::Vec::with_capacity(5);
         let mut oneofs = ::std::vec::Vec::with_capacity(0);
         fields.push(::protobuf::reflect::rt::v2::make_vec_simpler_accessor::<_, _>(
             "address_n",
@@ -5037,6 +5039,11 @@ impl EthereumSignAuth7702 {
             |m: &EthereumSignAuth7702| { &m.nonce },
             |m: &mut EthereumSignAuth7702| { &mut m.nonce },
         ));
+        fields.push(::protobuf::reflect::rt::v2::make_message_field_accessor::<_, EthereumDefinitions>(
+            "definitions",
+            |m: &EthereumSignAuth7702| { &m.definitions },
+            |m: &mut EthereumSignAuth7702| { &mut m.definitions },
+        ));
         ::protobuf::reflect::GeneratedMessageDescriptorData::new_2::<EthereumSignAuth7702>(
             "EthereumSignAuth7702",
             fields,
@@ -5058,6 +5065,11 @@ impl ::protobuf::Message for EthereumSignAuth7702 {
         if self.nonce.is_none() {
             return false;
         }
+        for v in &self.definitions {
+            if !v.is_initialized() {
+                return false;
+            }
+        };
         true
     }
 
@@ -5079,6 +5091,9 @@ impl ::protobuf::Message for EthereumSignAuth7702 {
                 32 => {
                     self.nonce = ::std::option::Option::Some(is.read_uint64()?);
                 },
+                42 => {
+                    ::protobuf::rt::read_singular_message_into_field(is, &mut self.definitions)?;
+                },
                 tag => {
                     ::protobuf::rt::read_unknown_or_skip_group(tag, is, self.special_fields.mut_unknown_fields())?;
                 },
@@ -5103,6 +5118,10 @@ impl ::protobuf::Message for EthereumSignAuth7702 {
         if let Some(v) = self.nonce {
             my_size += ::protobuf::rt::uint64_size(4, v);
         }
+        if let Some(v) = self.definitions.as_ref() {
+            let len = v.compute_size();
+            my_size += 1 + ::protobuf::rt::compute_raw_varint64_size(len) + len;
+        }
         my_size += ::protobuf::rt::unknown_fields_size(self.special_fields.unknown_fields());
         self.special_fields.cached_size().set(my_size as u32);
         my_size
@@ -5121,6 +5140,9 @@ impl ::protobuf::Message for EthereumSignAuth7702 {
         if let Some(v) = self.nonce {
             os.write_uint64(4, v)?;
         }
+        if let Some(v) = self.definitions.as_ref() {
+            ::protobuf::rt::write_message_field_with_cached_size(5, v, os)?;
+        }
         os.write_unknown_fields(self.special_fields.unknown_fields())?;
         ::std::result::Result::Ok(())
     }
@@ -5142,6 +5164,7 @@ impl ::protobuf::Message for EthereumSignAuth7702 {
         self.chain_id = ::std::option::Option::None;
         self.delegate = ::std::option::Option::None;
         self.nonce = ::std::option::Option::None;
+        self.definitions.clear();
         self.special_fields.clear();
     }
 
@@ -5151,6 +5174,7 @@ impl ::protobuf::Message for EthereumSignAuth7702 {
             chain_id: ::std::option::Option::None,
             delegate: ::std::option::Option::None,
             nonce: ::std::option::Option::None,
+            definitions: ::protobuf::MessageField::none(),
             special_fields: ::protobuf::SpecialFields::new(),
         };
         &instance
@@ -5503,15 +5527,17 @@ static file_descriptor_proto_data: &'static [u8] = b"\
     \x20\x02(\tR\x07address\"\x99\x01\n\x13EthereumDefinitions\x12'\n\x0fenc\
     oded_network\x18\x01\x20\x01(\x0cR\x0eencodedNetwork\x12#\n\rencoded_tok\
     en\x18\x02\x20\x01(\x0cR\x0cencodedToken\x124\n\x16encoded_display_forma\
-    t\x18\x03\x20\x01(\x0cR\x14encodedDisplayFormat\"\x86\x01\n\x14EthereumS\
+    t\x18\x03\x20\x01(\x0cR\x14encodedDisplayFormat\"\xda\x01\n\x14EthereumS\
     ignAuth7702\x12\x1b\n\taddress_n\x18\x01\x20\x03(\rR\x08addressN\x12\x19\
     \n\x08chain_id\x18\x02\x20\x02(\x04R\x07chainId\x12\x1a\n\x08delegate\
     \x18\x03\x20\x02(\tR\x08delegate\x12\x14\n\x05nonce\x18\x04\x20\x02(\x04\
-    R\x05nonce:\x04\x88\xb2\x19\x01\"\x84\x01\n\x19EthereumAuth7702Signature\
-    \x12\x1f\n\x0bsignature_v\x18\x01\x20\x02(\rR\nsignatureV\x12\x1f\n\x0bs\
-    ignature_r\x18\x02\x20\x02(\x0cR\nsignatureR\x12\x1f\n\x0bsignature_s\
-    \x18\x03\x20\x02(\x0cR\nsignatureS:\x04\x88\xb2\x19\x01B<\n#com.satoshil\
-    abs.trezor.lib.protobufB\x15TrezorMessageEthereum\
+    R\x05nonce\x12R\n\x0bdefinitions\x18\x05\x20\x01(\x0b20.hw.trezor.messag\
+    es.ethereum.EthereumDefinitionsR\x0bdefinitions:\x04\x88\xb2\x19\x01\"\
+    \x84\x01\n\x19EthereumAuth7702Signature\x12\x1f\n\x0bsignature_v\x18\x01\
+    \x20\x02(\rR\nsignatureV\x12\x1f\n\x0bsignature_r\x18\x02\x20\x02(\x0cR\
+    \nsignatureR\x12\x1f\n\x0bsignature_s\x18\x03\x20\x02(\x0cR\nsignatureS:\
+    \x04\x88\xb2\x19\x01B<\n#com.satoshilabs.trezor.lib.protobufB\x15TrezorM\
+    essageEthereum\
 ";
 
 /// `FileDescriptorProto` object which was a source for this generated file