Update CHANGELOG and Announcement

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to the "claude-dev" extension will be documented in this fil
 
 <!-- Check [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file. -->
 
+## [1.0.8]
+
+- Shows diff view of new or edited files right in the editor
+
 ## [1.0.7]
 
 - Replace `list_files` and `analyze_project` with more explicit `list_files_top_level`, `list_files_recursive`, and `view_source_code_definitions_top_level` to get source code definitions only for files relevant to the task