Rewrite fixDisplayIssues.ts from 719 → 70 lines. Removed:
- Nuclear CSS injection (background-image: none !important on *,
border removal on all non-input elements, display: none on narrow
elements)
- MutationObserver watching all DOM mutations
- setInterval(1000ms) scanning every element in the document
- 50+ debug log statements
Kept: grid overlay removal (harmless), 3 opt-in diagnostic console
commands (__enableCleanMode, __disableCleanMode, __findVerticalLines).
Also reduce aggressiveVisualFix.ts to a documented no-op (was already
disabled but still contained ~190 lines of dead code).
The original vertical line issue was fixed at the CSS source
(global-effects.css gradient removal + input focus styles).
Co-authored-by: Cursor <cursoragent@cursor.com>
04a353fdfc