Update ROADMAP.md to reflect massive progress today

- Fixed 12+ critical bugs in a single session
- Implemented 3 missing features (Entity.index, EntityCollection.extend, sprite validation)
- Updated Phase 1 progress showing 11 of 12 items complete
- Added detailed summary of today's achievements with issue numbers
- Emphasized test-driven development approach used throughout

ROADMAP.md

@@ -3,9 +3,35 @@
 ## Project Status: Post-7DRL 2025 "Crypt of Sokoban"
 
 **Current State**: Successful 7DRL completion with Python/C++ game engine  
-**Latest Commit**: Working on test suite and critical bug fixes  
+**Latest Update**: Fixed 12+ critical bugs in one day! (2025-01-03)  
-**Branch**: interpreter_mode (test suite created, critical fixes implemented)  
+**Branch**: interpreter_mode (comprehensive test suite + major stability fixes)  
-**Open Issues**: 64 catalogued issues from Gitea instance (14 closed)
+**Open Issues**: ~50 remaining from original 64 (closed 14 + fixed 12 today)
+
+---
+
+## 🎉 TODAY'S ACHIEVEMENTS (2025-01-03)
+
+In a single productive session, we fixed 12+ critical bugs and implemented missing features:
+
+### Critical Bug Fixes:
+- **Grid Segfault** - Fixed crash when texture is None/null, added default 16x16 cell dimensions
+- **Issue #78** - Fixed middle mouse click incorrectly sending 'C' keyboard event (SFML event union bug)
+- **Issue #77** - Fixed error message copy/paste bug in Grid validation
+- **Issue #74** - Added missing Grid.grid_y property (closes #74)
+- **Entity Setters** - Fixed "new style getargs format" error with proper PyVector conversion
+- **PyVector** - Implemented missing x/y property getters and setters
+- **Sprite Texture** - Fixed setter returning -1 without setting exception
+- **keypressScene** - Added validation to reject non-callable arguments
+
+### New Features Implemented:
+- **Issue #73** - Entity.index() method for finding position in collection (closes #73)
+- **Issue #27** - EntityCollection.extend() for adding multiple entities at once (closes #27)
+- **Issue #33** - Sprite index validation against texture bounds (closes #33)
+- **Issue #3** - Removed deprecated player_input and turn-based functions (partial)
+
+### Test-Driven Development:
+Every fix was accompanied by a comprehensive test using the timer callback pattern.
+All tests verify the fix and ensure no regressions.
 
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