git-subtree-dir: judge4c
git-subtree-mainline: 9aac4bce
git-subtree-split: b0461378

feat(playground): add Python support in code editor and multi-model editor using path as an identifier

feat(playground): add theme selector component and enhance code editor with additional themes and languages

- Changed the import statement for `retrieveTreeStructure` from a default import to a named import from the `@/actions` module.
- This change improves code readability and adheres to best practices for module imports.

feat(playground): integrate Gitea API for file tree retrieval and update PlaygroundSidebar component

feat(playground): refactor PlaygroundSidebar component by removing unused changes section and reorganizing imports

chore(site): add siteConfig

feat(i18n): restructure translation files and update NavUser component for internationalization support

feat(i18n): refactor authentication to use user locale from cookies and implement language switching

chore(eslint): add warning rule for unused variables in ESLint configuration

refactor(gitea): make username optional in GiteaProfile interface

style(eslint): add warning rule for empty object type in ESLint configuration

- Integrated `SessionProvider` from `next-auth/react` to manage user sessions.
- Updated `AppSidebar` to use `SessionProvider` and reflect user data.
- Modified `NavUser` to display user info based on session, with default fallback.

- Replaced the default Gitea logo URL with a local image path to ensure the logo is displayed correctly.
- The default URL `https://authjs.dev/img/providers/gitea.svg` is not supported, so a local image is used instead.