update: move completed issue #377 from DOING to DONE after PR #400 merge

Author: krystophny

BACKLOG.md

@@ -15,7 +15,7 @@
 - [ ] #388: Fix - investigate test_mpeg_consolidated failure unrelated to ylabel rotation (test infrastructure)
 
 ## DOING (Current Work)
-- [x] #377: Enhancement - make finer grid on pcolormesh_demo.html (branch: enhance-finer-grid-377)
+*Empty - ready for next issue*
 
 ## FUTURE SPRINTS - Systematic Restoration
 
@@ -40,6 +40,7 @@
 - Performance impact validation
 
 ## DONE (Completed)
+- [x] #377: Enhancement - make finer grid on pcolormesh_demo.html - FIXED: Successfully upgraded pcolormesh demo grids from coarse to 50x50 high-resolution with comprehensive test coverage and verified visual output across PNG, PDF, and ASCII backends, enhancing mathematical function fidelity and visual quality (PR #400 merged)
 - [x] #392: Fix - Strange truncations in example documentation output - FIXED: Replaced all "[truncated]" placeholders in documentation with complete ASCII art examples using direct embedding approach following KISS principle, fixing 7 documentation files with 14+ ASCII preview sections, now showing complete plot visualization with proper axes and labels (PR #398 merged)
 - [x] #396: Fix - incomplete parameter forwarding in matplotlib API wrapper functions - FIXED: Complete parameter forwarding implementation in matplotlib wrapper functions with comprehensive API coverage and test validation covering contour_filled, pcolormesh, streamplot, and all matplotlib API functions with proper precision conversion and single-call forwarding patterns (PR #397 merged)
 - [x] #373: Fix - too many legend entries in second plot of legend_demo.html (legend system) - FIXED: Implemented proper legend entry reset in legend() procedure to prevent accumulation on multiple calls, resolving excess legend entries issue (PR #394 merged)