[自動レビュー 2026-05-09] 日次コードレビューによる修正

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '18'
+          node-version: '20'
           cache: 'npm'
 
       - name: Install dependencies

.gitignore

@@ -32,4 +32,8 @@ output
 .gemini
 .next
 images
-build_output.txt
+build_output.txt
+
+# Test output files
+output_test.jpg
+output_test.png

services/geminiService.ts

@@ -1,7 +1,6 @@
 import { GoogleGenAI, Type, GenerateContentResponse } from "@google/genai";
 import { TranslationBlock } from '../types';
 
-// Helper to get an initialized AI instance
 const getAiClient = (customApiKey?: string) => {
     const apiKey = customApiKey || (typeof process !== 'undefined' ? process.env.NEXT_PUBLIC_GEMINI_API_KEY : undefined);
     if (!apiKey) {
@@ -10,6 +9,13 @@ const getAiClient = (customApiKey?: string) => {
     return new GoogleGenAI({ apiKey });
 };
 
+const isTranslationBlockArray = (data: unknown): data is TranslationBlock[] => {
+    return Array.isArray(data) && data.every(item =>
+        typeof item === 'object' && item !== null &&
+        'japaneseText' in item && 'englishText' in item && 'boundingBox' in item
+    );
+};
+
 const responseSchema = {
     type: Type.ARRAY,
     items: {
@@ -74,10 +80,17 @@ export const translateImageText = async (base64Image: string, mimeType: string,
 
         const jsonText = response.text.trim();
         const parsedJson = JSON.parse(jsonText);
-        return parsedJson as TranslationBlock[];
+
+        if (!isTranslationBlockArray(parsedJson)) {
+            throw new Error("APIレスポンスの形式が無効です。");
+        }
+
+        return parsedJson;
 
     } catch (error) {
-        console.error("Error calling Gemini API:", error);
+        if (process.env.NODE_ENV === 'development') {
+            console.error("Error calling Gemini API:", error);
+        }
         throw new Error("画像の翻訳に失敗しました。API呼び出しでエラーが発生しました。");
     }
 };
@@ -113,7 +126,9 @@ export const generateImageSummary = async (base64Image: string, mimeType: string
         return response.text.trim();
 
     } catch (error) {
-        console.error("Error generating image summary:", error);
+        if (process.env.NODE_ENV === 'development') {
+            console.error("Error generating image summary:", error);
+        }
         return "翻訳済み画像";
     }
-};
+};