دانلود codeg 0.15.8

- feat(chat): Start a quick conversation without picking a project folder — a new "Chat" section sits at the top of the sidebar. While you're in a chat, the folder/branch pickers and side panel step aside.
- feat(sidebar): Start a new conversation right from any folder header, with a consistent icon everywhere.
- feat(chat): The message navigator is now a single chip next to the plan and sub-agent chips — open it to jump between your messages and see each one's changed files and diff.
- feat(tabs): Middle-click a tab to close it — in the session, file, and terminal tab bars.
- fix(settings): The Settings menu now lines up neatly and scrolls when it's taller than the window.
- style(chat): The composer's "+" button is toned down to match the selectors next to it.