[Fix] ì�이미지생성관련 배포실패버그수정 (#102)

Author: johnbosco0414

back/src/main/java/com/back/global/ai/client/image/NoOpImageAiClient.java

@@ -0,0 +1,44 @@
+package com.back.global.ai.client.image;
+
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.stereotype.Component;
+
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * 이미지 AI 기능이 비활성화되었을 때 사용되는 NoOp 구현체.
+ * 실제 이미지를 생성하지 않고 placeholder URL을 반환합니다.
+ *
+ * 활성화 조건:
+ * - ai.image.enabled=false인 경우
+ * - STABILITY_API_KEY가 설정되지 않은 경우
+ * - S3 연결이 불가능한 프로덕션 환경
+ */
+@Slf4j
+@Component
+@ConditionalOnMissingBean(ImageAiClient.class)
+public class NoOpImageAiClient implements ImageAiClient {
+
+    public NoOpImageAiClient() {
+        log.info("NoOpImageAiClient initialized - Image generation is disabled");
+    }
+
+    @Override
+    public CompletableFuture<String> generateImage(String prompt) {
+        log.debug("Image generation disabled. Returning placeholder for prompt: {}", prompt);
+        return CompletableFuture.completedFuture("placeholder-image-url");
+    }
+
+    @Override
+    public CompletableFuture<String> generateImage(String prompt, Map<String, Object> options) {
+        log.debug("Image generation disabled. Returning placeholder for prompt: {}", prompt);
+        return CompletableFuture.completedFuture("placeholder-image-url");
+    }
+
+    @Override
+    public boolean isEnabled() {
+        return false;
+    }
+}