Worked on enhancing stream topic edit permissions in the zulip/zulip repository by extracting and centralizing shared permission checks into a dedicated helper function. This refactor consolidated permission and edit-limit logic for message editing, reducing code duplication and minimizing the risk of edge cases. By introducing a time-limit buffer for editing, the changes improved user experience and increased the resilience of edit operations. The work, implemented using Python and focused on backend and API development, also standardized the permission path, addressing part of issue #35161 and laying the foundation for safer topic-related edits and future topic-resolution features within the platform.