chore: update changelog

Author: Justineo

CHANGELOG.md

@@ -5,6 +5,8 @@
 - Added MCP server support to let agents/IDEs pull code, structure, and screenshots from your current Figma selection.
 - The inspect panel can be resized horizontally by dragging either its left or right edge. (Suggested and implemented by @molinla at [#34](https://github.com/ecomfe/tempad-dev/pull/34))
 - Measure mode won't trigger node duplication anymore when dragging a node in design mode.
+- Improved the error message when `window.figma` is unavailable.
+- Improved error handling for retrieving dev resources.
 
 ## 0.13.1