feat(ai-character): 관리자 기능 기반을 추가한다

src/main/kotlin/kr/co/vividnext/sodalive/common/SodaException.kt

@@ -1,9 +1,12 @@
 package kr.co.vividnext.sodalive.common
 
+import org.springframework.http.HttpStatus
+
 class SodaException(
     message: String? = null,
     val errorProperty: String? = null,
-    val messageKey: String? = null
+    val messageKey: String? = null,
+    val httpStatus: HttpStatus? = null
 ) : RuntimeException(message)
 
 class AdsChargeException(

src/main/kotlin/kr/co/vividnext/sodalive/common/SodaExceptionHandler.kt

@@ -6,6 +6,7 @@ import kr.co.vividnext.sodalive.i18n.SodaMessageSource
 import org.slf4j.LoggerFactory
 import org.springframework.dao.DataIntegrityViolationException
 import org.springframework.http.HttpStatus
+import org.springframework.http.ResponseEntity
 import org.springframework.security.access.AccessDeniedException
 import org.springframework.security.authentication.BadCredentialsException
 import org.springframework.security.authentication.InternalAuthenticationServiceException
@@ -13,7 +14,9 @@ import org.springframework.web.bind.annotation.ExceptionHandler
 import org.springframework.web.bind.annotation.ResponseStatus
 import org.springframework.web.bind.annotation.RestControllerAdvice
 import org.springframework.web.multipart.MaxUploadSizeExceededException
+import org.springframework.web.multipart.MultipartException
 import org.springframework.web.server.ResponseStatusException
+import javax.servlet.http.HttpServletRequest
 
 @RestControllerAdvice
 class SodaExceptionHandler(
@@ -38,12 +41,25 @@ class SodaExceptionHandler(
         )
     }
 
-    @ExceptionHandler(MaxUploadSizeExceededException::class)
-    fun handleMaxUploadSizeExceededException(e: MaxUploadSizeExceededException) = run {
-        val logMessage = messageSource.getMessage("common.error.max_upload_size", logLang)
+    @ExceptionHandler(MaxUploadSizeExceededException::class, MultipartException::class)
+    fun handleMultipartException(e: MultipartException, request: HttpServletRequest) = run {
+        val isAiCharacterAdminPath = isAiCharacterAdminPath(request.requestURI)
+        val messageKey = if (e is MaxUploadSizeExceededException) {
+            "common.error.max_upload_size"
+        } else if (isAiCharacterAdminPath) {
+            "common.error.invalid_request"
+        } else {
+            "common.error.unknown"
+        }
+        val logMessage = messageSource.getMessage(messageKey, logLang)
         logger.error("API error: {}", logMessage, e)
-        val message = messageSource.getMessage("common.error.max_upload_size", langContext.lang)
-        ApiResponse.error(message = message)
+        val message = messageSource.getMessage(messageKey, langContext.lang)
+        val body = ApiResponse.error(message = message)
+        if (isAiCharacterAdminPath) {
+            ResponseEntity.status(HttpStatus.BAD_REQUEST).body(body)
+        } else {
+            body
+        }
     }
 
     @ExceptionHandler(AccessDeniedException::class)
@@ -99,4 +115,12 @@ class SodaExceptionHandler(
         val message = messageSource.getMessage("common.error.unknown", langContext.lang)
         ApiResponse.error(message)
     }
+
+    private fun isAiCharacterAdminPath(requestUri: String): Boolean {
+        return requestUri == AI_CHARACTER_ADMIN_PATH_PREFIX || requestUri.startsWith("$AI_CHARACTER_ADMIN_PATH_PREFIX/")
+    }
+
+    companion object {
+        private const val AI_CHARACTER_ADMIN_PATH_PREFIX = "/admin/ai-characters"
+    }
 }