비밀번호 변경 기능 개선 및 검증 강화

- 비밀번호 변경 페이지에 확인 Dialog 추가 (로그인/거래취소)
- 비밀번호 에러 코드별 상세 메시지 처리
  * INVALID_PASSWORD, UPDATE_PASSWORD_FAIL, PREVIOUS_PASSWORD
  * MERCHANT_INFO_MATCH_PASSWORD, PASSWORD_LENGHT
  * DISALLOWED_CHARACTERS_INCLUDED, DISALLOWED_WHITE_SPACE
  * NOT_ENOUGH_COMPLEXITY, REPEATED_CHARACTER_SEQUENCE
  * COMMON_PASSWORD_DETECTED
- 비밀번호 입력 검증 로직 통합 (validatePassword)
- 이메일/전화번호 마스킹 기능 추가
- 사용자 추가 페이지 에러 처리 개선
- 다국어 메시지 추가 (한국어/영어)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/locales/en.json

@@ -327,6 +327,8 @@
         "pleaseEnterId": "Please enter ID",
         "pleaseEnterPassword": "Please enter password",
         "pleaseEnter8OrMoreCharacters": "Please enter 8 or more characters",
+        "passwordFormatRequirement": "Please set a password with 8 to 20 characters including letters, numbers, and special characters.",
+        "passwordSecurityRequirement": "Password cannot contain consecutive numbers (3+ digits), repeated characters (2+ times), or same characters (3+ times).",
         "enterPassword": "Enter password",
         "reEnterPassword": "Re-enter password",
         "enterPhoneNumber": "Enter phone number",
@@ -339,6 +341,7 @@
         "userAddFailed": "Failed to add user.",
         "userInfoSavedSuccessfully": "User information saved successfully.",
         "userInfoSaveFailed": "Failed to save user information.",
+        "confirmPasswordChange": "Would you like to change your password?",
         "passwordChangedSuccessfully": "Password changed successfully.",
         "passwordChangeFailed": "Failed to change password.",
         "permissionSavedSuccessfully": "Permission saved successfully.",
@@ -357,7 +360,26 @@
         "menuPermissions": "Menu Permissions",
         "deleteUserConfirm": "Do you want to delete this user?",
         "deleteUserSuccess": "User deleted successfully.",
-        "deleteUserFailed": "Failed to delete user."
+        "deleteUserFailed": "Failed to delete user.",
+        "passwordNoSpaceAllowed": "Password cannot contain spaces.",
+        "passwordLengthRequirement": "Password must be 8-20 characters long.",
+        "passwordInvalidCharacter": "Password contains invalid characters.",
+        "passwordCombinationRequirement": "Password must include at least 2 of: letters+numbers, letters+special characters, numbers+special characters.",
+        "passwordNoRepeatingCharacters": "Password cannot contain the same character 3 times in a row.",
+        "passwordNoConsecutiveSequence": "Password cannot contain 3 or more consecutive characters or numbers.",
+        "passwordNoKeyboardSequence": "Password cannot contain 3 consecutive characters from keyboard layout.",
+        "errors": {
+            "invalidPassword": "Incorrect password.",
+            "updatePasswordFail": "Password update failed.",
+            "previousPassword": "Cannot use previously used password.",
+            "merchantInfoMatchPassword": "Password cannot match merchant information.",
+            "passwordLength": "Password length error",
+            "disallowedCharactersIncluded": "Contains disallowed characters",
+            "disallowedWhiteSpace": "Contains whitespace characters",
+            "notEnoughComplexity": "Password does not meet complexity requirements",
+            "repeatedCharacterSequence": "Consecutive character/number sequence error",
+            "commonPasswordDetected": "Password validation failed"
+        }
     },
     "favorite": {
         "edit": "Edit",