feat: comment update/delete endpoints

app/main.py

@@ -490,3 +490,28 @@ def dashboard_stats(project_id: int = None, db: Session = Depends(get_db)):
         "by_type": by_type,
         "by_priority": by_priority,
     }
+
+
+
+# ============ Comments (update/delete) ============
+
+@app.patch("/comments/{comment_id}", response_model=schemas.CommentResponse)
+def update_comment(comment_id: int, comment_update: schemas.CommentUpdate, db: Session = Depends(get_db)):
+    comment = db.query(models.Comment).filter(models.Comment.id == comment_id).first()
+    if not comment:
+        raise HTTPException(status_code=404, detail="Comment not found")
+    for field, value in comment_update.model_dump(exclude_unset=True).items():
+        setattr(comment, field, value)
+    db.commit()
+    db.refresh(comment)
+    return comment
+
+
+@app.delete("/comments/{comment_id}", status_code=status.HTTP_204_NO_CONTENT)
+def delete_comment(comment_id: int, db: Session = Depends(get_db)):
+    comment = db.query(models.Comment).filter(models.Comment.id == comment_id).first()
+    if not comment:
+        raise HTTPException(status_code=404, detail="Comment not found")
+    db.delete(comment)
+    db.commit()
+    return None