feat: 태그 시스템 구현

[google-labs-jules]

사용자 요청에 따라 블로그에 새로운 기능으로 태그 시스템을 추가했습니다. 이를 통해 사용자는 주제별로 게시물을 분류하고 쉽게 찾아볼 수 있습니다.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Project	Deployment	Preview	Comments	Updated (UTC)
blog	✅ Ready	Preview	Comment	Aug 12, 2025 11:27am

[claude]

Claude finished @google-labs-jules[bot]'s task —— View job

---

Code Review Complete ✅

I've completed a thorough review of this pull request implementing the tag system. Here's my comprehensive feedback:

Review Checklist

• Analyze changed files and understand the tag system implementation
• Review new Search component for code quality and security
• Review new Highlight component
• Check modified files for potential issues
• Evaluate performance considerations
• Assess security concerns
• Check for test coverage
• Provide comprehensive feedback

🎯 Overall Assessment

This is a well-implemented tag system with search functionality. The code demonstrates good React/Next.js practices and proper TypeScript usage. However, there are several areas for improvement.

🟢 Strengths

1. Good Architecture: Clean separation of concerns with separate components for Search and Highlight functionality
2. Proper TypeScript Usage: Good type definitions and usage throughout
3. Accessibility: Search component includes proper ARIA labels and keyboard navigation
4. User Experience: Keyboard shortcuts (Cmd/Ctrl+K) and arrow key navigation enhance usability
5. Performance: Proper use of useMemo for expensive operations like Fuse.js initialization

⚠️ Issues & Recommendations

Critical Issues:

1. Navigation Bug in Search Component (app/components/Search.tsx:61)

   router.push(`/${post.slug}`);

   The slug format is "2025/ai-society-future" but this creates URLs like /2025/ai-society-future which may not match your routing structure. Based on your post structure, this should likely be:

   router.push(`/${post.slug}`); // if routes are configured for this
   // OR
   router.push(`/posts/${post.slug}`); // if posts are under /posts/

2. Mixed Navigation Methods (app/components/Search.tsx:143)
   Using <a href=""> instead of Next.js Link component breaks client-side routing:

   // Current (problematic):
   <a href={`/${post.slug}`}>
   
   // Should be:
   <Link href={`/${post.slug}`}>

Code Quality Issues:

3. Inconsistent Props Interface (app/components/Search.tsx:179)

   // Current:
   function SearchIcon(props: any) {
   
   // Should be:
   function SearchIcon(props: React.SVGProps<SVGSVGElement>) {

4. Missing Error Handling (app/components/Search.tsx:157)

   <Highlight text={contentMatch.value!} indices={contentMatch.indices} />

   The non-null assertion (!) should be replaced with proper null checking:

   {contentMatch?.value && (
     <Highlight text={contentMatch.value} indices={contentMatch.indices} />
   )}

5. Potential Memory Leak (app/components/Search.tsx:75-78)
   The global keydown event listener is properly cleaned up, but consider using the same handler reference for both add/remove to be more explicit.

Performance Considerations:

6. Fuse.js Configuration: The current threshold of 0.3 is reasonable, but consider testing with different values for better search relevance
7. Large Content Indexing: The search indexes full post content which could impact performance with many posts. Consider limiting content length or using excerpt instead

Security:

8. No XSS Risk: The Highlight component properly uses React's built-in XSS protection
9. Safe External Links: All external links in header properly use target="_blank"

Test Coverage:

10. Missing Tests: No test files found in the project. Consider adding:
    • Unit tests for Search and Highlight components
    • Integration tests for search functionality
    • Accessibility tests for keyboard navigation

🔧 Minor Issues

11. Header Component (app/header.tsx:17-21): Hard-coded link to /tags - ensure this route exists
12. Package.json: New dependencies @headlessui/react and fuse.js are appropriate choices
13. Type Safety: Consider adding more specific types instead of relying on inference

📋 Recommendations

1. Fix the critical navigation issues before merging
2. Add basic unit tests for the new components
3. Consider adding error boundaries around the search functionality
4. Add loading states for search operations
5. Consider debouncing the search input for better performance

🎨 Code Style

The code follows consistent formatting and Next.js conventions. The use of Tailwind classes is appropriate and follows the existing project patterns.

---