docs: update ROADMAP with PyArgHelpers infrastructure completion

ROADMAP.md

@@ -11,6 +11,16 @@
 
 ## Recent Achievements
 
+### 2025-07-08: PyArgHelpers Infrastructure Complete! 🔧
+**Standardized Python API Argument Parsing**
+- Unified position handling: (x, y) tuples or separate x, y args
+- Consistent size parsing: (w, h) tuples or width, height args
+- Grid-specific helpers for tile-based positioning
+- Proper conflict detection between positional and keyword args
+- All UI components migrated: Frame, Caption, Sprite, Grid, Entity
+- Improved error messages: "Value must be a number (int or float)"
+- Foundation for Phase 7 documentation efforts
+
 ### 2025-07-05: ALPHA 0.1 ACHIEVED! 🎊🍾
 **All Alpha Blockers Resolved!**
 - Z-order rendering with performance optimization (Issue #63)
@@ -69,10 +79,10 @@
 
 ### Active Development:
 - **Branch**: alpha_streamline_2
-- **Current Phase**: Phase 6 Complete - Ready for Phase 7!
+- **Current Phase**: Phase 7 - Documentation & Distribution
-- **Achievement**: Rendering Revolution completed ahead of schedule
+- **Achievement**: PyArgHelpers infrastructure complete - standardized Python API
 - **Strategic Vision**: See STRATEGIC_VISION.md for platform roadmap
-- **Latest**: RenderTexture base infrastructure complete, UIFrame clipping working!
+- **Latest**: All UI components now use consistent argument parsing patterns!
 
 ### 🏗️ Architectural Dependencies Map