Rewrote main.cpp from Step 12 scaffold to full editor shell. Added tree-sitter
linking to whetstone_editor target. Fixed WMOD_ prefix to avoid Windows SDK
MOD_SHIFT/MOD_ALT macro conflicts. Editor now has editable text area, live AST
view, syntax-highlighted preview, generated code tab, find/replace, keybinding
profile selector, and status bar.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>