v0.0.7 | 블로그 기능 개선

- Post 모델 개선 (author_id, updated_at, view_count 등)
- Tag 모델 및 태그 기능 추가
- 댓글 기능 추가
- API 확장

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

blog/models.py

@@ -1,12 +1,58 @@
 from django.db import models
 from django.conf import settings
-from django.contrib.auth.models import User 
+from django.contrib.auth.models import User
+
+
+class Tag(models.Model):
+    """태그 모델"""
+    name = models.CharField(max_length=50, unique=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+
+    class Meta:
+        ordering = ['name']
+
+    def __str__(self):
+        return self.name
+
 
 class Post(models.Model):
     title = models.CharField(max_length=255)
     content = models.TextField()
+    tags = models.ManyToManyField(Tag, related_name='posts', blank=True)
     created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+    author_id = models.CharField(max_length=150, blank=True, default='')
     author_name = models.CharField(max_length=150)
 
+    class Meta:
+        ordering = ['-created_at']
+
     def __str__(self):
         return self.title
+
+
+class Comment(models.Model):
+    """댓글/대댓글 모델"""
+    post = models.ForeignKey(
+        Post,
+        related_name="comments",
+        on_delete=models.CASCADE
+    )
+    parent = models.ForeignKey(
+        'self',
+        null=True,
+        blank=True,
+        related_name="replies",
+        on_delete=models.CASCADE
+    )  # 대댓글 지원
+    content = models.TextField()
+    author_id = models.CharField(max_length=150, blank=True, default='')
+    author_name = models.CharField(max_length=150)
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    class Meta:
+        ordering = ['created_at']
+
+    def __str__(self):
+        return f"Comment by {self.author_name} on {self.post.title}"