feat(chats): add per-user chat archive support

app/chats/router.py

@@ -32,6 +32,7 @@ from app.chats.service import (
     remove_chat_member_for_user,
     serialize_chat_for_user,
     serialize_chats_for_user,
+    set_chat_archived_for_user,
     update_chat_member_role_for_user,
     update_chat_notification_settings_for_user,
     update_chat_title_for_user,
@@ -47,10 +48,18 @@ async def list_chats(
     limit: int = 50,
     before_id: int | None = None,
     query: str | None = None,
+    archived: bool = False,
     db: AsyncSession = Depends(get_db),
     current_user: User = Depends(get_current_user),
 ) -> list[ChatRead]:
-    chats = await get_chats_for_user(db, user_id=current_user.id, limit=limit, before_id=before_id, query=query)
+    chats = await get_chats_for_user(
+        db,
+        user_id=current_user.id,
+        limit=limit,
+        before_id=before_id,
+        query=query,
+        archived=archived,
+    )
     return await serialize_chats_for_user(db, user_id=current_user.id, chats=chats)
 
 
@@ -228,3 +237,23 @@ async def update_chat_notifications(
         user_id=current_user.id,
         payload=payload,
     )
+
+
+@router.post("/{chat_id}/archive", response_model=ChatRead)
+async def archive_chat(
+    chat_id: int,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+) -> ChatRead:
+    chat = await set_chat_archived_for_user(db, chat_id=chat_id, user_id=current_user.id, archived=True)
+    return await serialize_chat_for_user(db, user_id=current_user.id, chat=chat)
+
+
+@router.post("/{chat_id}/unarchive", response_model=ChatRead)
+async def unarchive_chat(
+    chat_id: int,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+) -> ChatRead:
+    chat = await set_chat_archived_for_user(db, chat_id=chat_id, user_id=current_user.id, archived=False)
+    return await serialize_chat_for_user(db, user_id=current_user.id, chat=chat)