fix: BIP-39 test expects Failure not ButtonRequest, manual screenshot

Firmware sends Failure directly (no confirm dialog). The test
asserts Failure + message text, then manually calls _capture_oled()
to capture the warning screen. Works with is_animating() guard.

Author: BitHighlander

tests/test_msg_recoverydevice_cipher.py

@@ -197,16 +197,16 @@ def test_invalid_bip39_word_rejected(self):
         self.assertIsInstance(ret, proto.CharacterRequest)
         ret = self.client.call_raw(proto.CharacterAck(character=' '))
 
-        # Firmware shows "Invalid Word / Word not found in BIP39 wordlist"
-        # on OLED via confirm() — ButtonRequest pauses for screenshot capture
-        self.assertIsInstance(ret, proto.ButtonRequest)
-        self.client.debug.press_yes()
-        ret = self.client.call_raw(proto.ButtonAck())
-
-        # Firmware should reject with Failure — word not in BIP-39 wordlist
+        # Firmware rejects immediately with Failure — word not in BIP-39 wordlist
         self.assertIsInstance(ret, proto.Failure)
         self.assertIn("Word not found", ret.message)
 
+        # Capture the OLED rejection screen via DebugLink
+        # The firmware renders "Word not in wordlist" before sending Failure
+        import os as _os
+        if _os.environ.get('KEEPKEY_SCREENSHOT') == '1' and self.client.debug:
+            self.client._capture_oled()
+
     def test_backspace(self):
         mnemonic = self.mnemonic12
         ret = self.client.call_raw(proto.RecoveryDevice(word_count=12,