chore:release (#2712)

<!-- This is an auto-generated description by cubic. -->
## Summary by cubic
Release 2.9.3. Adds native video support in markdown and a language
config option. Improves LangChain v1 compatibility and fixes several UI
and session issues.

- **New Features**
  - Native video in markdown
  - Language option in config.toml
  - LangChain v1-compatible imports

- **Bug Fixes**
  - Prevent header_auth page blinking
  - Restore websocket sessions by setting environ
  - Hide thread sharing when disabled
  - Stop setting logging globally

<sup>Written for commit 3e76791.
Summary will update automatically on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

Author: hayescode

CHANGELOG.md

@@ -4,6 +4,24 @@ All notable changes to Chainlit will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
+## [2.9.3] - 2025-12-04
+
+### Added
+- Add tests for oauth providers and messages
+- Merge metadata in chainlit data layer
+- Add native video support in markdown rendering
+- Optimize chat message rendering
+- Add language configuration option to config.toml
+- Upgrade langchain imports for v1 compatibility
+- Improve icon name formatting issues
+
+### Fixed
+- Fixed page blinking issue with header_auth
+- Set environ when restoring websocket session
+- Move hello.py to avoid import issues
+- Fix issue showing thread sharing when disabled
+- Disable Chainlit from setting logging globally
+
 ## [2.9.2] - 2025-11-22
 
 ### Added

backend/chainlit/version.py

@@ -1 +1 @@
-__version__ = "2.9.2"
+__version__ = "2.9.3"