Event layout page update.

backend/app/schemas/event_comment.py

@@ -0,0 +1,24 @@
+from pydantic import BaseModel, Field
+from datetime import datetime
+from typing import List
+
+
+class EventCommentCreate(BaseModel):
+    content: str = Field(..., min_length=1, max_length=500)
+
+
+class EventComment(BaseModel):
+    id: int
+    event_id: int
+    user_id: int
+    username: str
+    content: str
+    created_at: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class EventCommentsResponse(BaseModel):
+    comments: List[EventComment]
+    total: int