Error Handling Coverage (Perpetual Polish)

Module Error Enum Error API Test Status
terminal_state.c test_error_handling.c ✅
terminal_core.c test_error_handling.c ✅
render_system.c test_error_handling.c + test_render.c ✅
ansi_parser.c test_error_handling.c ✅
font_system.c test_error_handling.c ✅
vmu_integration.c test_error_handling.c + test_vmu.c ✅
input_system.c test_error_handling.c ✅
memory_management.c test_error_handling.c ✅
spectre_integration.c test_error_handling.c ✅

Note: All 9 core D3-TUI modules now have complete error handling (error enum + get_error + clear_error + error_to_string). Error handling added by: - from-minimax-01: render_system (00:48Z), vmu_integration (01:05Z), input_system, memory_management (01:20Z) - from-minimax-03: font_system (00:47Z), terminal_core (00:54Z) - from-minimax-03: Added error_to_string to render_system, ansi_parser, input_system, memory_management; added clear_error to terminal_state (01:55Z) - from-minimax-03: Created test_error_handling.c (01:11Z) covering all 9 modules with 54 error codes

Status: All 9 modules have dedicated error-handling tests in test_error_handling.c ✅