Add changeset and update gitignore

Author: elieteyssedou

.changeset/refactor-shared-state-service.md

@@ -0,0 +1,14 @@
+---
+"@mcp-pointer/server": minor
+"@mcp-pointer/shared": minor
+---
+
+Refactor SharedStateService with dual format support and add comprehensive tests
+
+- Added dual format support for legacy and new raw DOM data
+- Created ElementProcessor service for server-side DOM processing  
+- Added comprehensive test suite with factory pattern
+- Added DOM_ELEMENT_POINTED message type support
+- Maintains full backward compatibility
+
+Server ready for browser extension updates.

.claude/plan.md

@@ -10,4 +10,6 @@ dist/
 packages/server/src/__tests__/tmp/
 
 # Release artifacts
-mcp-pointer-chrome-extension.zip
+mcp-pointer-chrome-extension.zip
+
+.claude/*.local.md