feat(chat): support public channel chat

app/router/chat/__init__.py

@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+from app.config import settings
+from app.router.v2 import api_v2_router as router
+
+from . import channel, message  # noqa: F401
+from .server import chat_router as chat_router
+
+from fastapi import Query
+
+__all__ = ["chat_router"]
+
+
+@router.get("/notifications")
+async def get_notifications(max_id: int | None = Query(None)):
+    if settings.server_url is not None:
+        notification_endpoint = f"{settings.server_url}notification-server".replace(
+            "http://", "ws://"
+        ).replace("https://", "wss://")
+    else:
+        notification_endpoint = "/notification-server"
+
+    return {
+        "has_more": False,
+        "notifications": [],
+        "unread_count": 0,
+        "notification_endpoint": notification_endpoint,
+    }