feat(threads): add basic message thread API and web thread panel

app/messages/router.py

@@ -20,6 +20,7 @@ from app.messages.service import (
     delete_message_for_all,
     forward_message,
     forward_message_bulk,
+    get_message_thread,
     get_messages,
     list_message_reactions,
     search_messages,
@@ -59,6 +60,16 @@ async def search_messages_endpoint(
     return await search_messages(db, user_id=current_user.id, query=query, chat_id=chat_id, limit=limit)
 
 
+@router.get("/{message_id}/thread", response_model=list[MessageRead])
+async def message_thread(
+    message_id: int,
+    limit: int = 100,
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+) -> list[MessageRead]:
+    return await get_message_thread(db, message_id=message_id, user_id=current_user.id, limit=limit)
+
+
 @router.get("/{chat_id}", response_model=list[MessageRead])
 async def list_messages(
     chat_id: int,