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fix: resolve terminal resize scrollback ghost renders

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- Switch resize handler to 300ms trailing-edge debounce for single reflow
- Add \x1b[3J (Erase Saved Lines) to clear scrollback reflow debris
- Remove client-side cursor-up flicker filter and DEC 2026 marker
  stripping — xterm.js 6.0 handles synchronized output natively
- Remove server-side DEC 2026 wrapping to prevent premature sync exit
  from non-reference-counted nested markers
This commit is contained in:
zhouyuan
2026-03-12 01:04:21 +08:00
parent 2329dab240
commit 28dfc279d4
3 changed files with 97 additions and 154 deletions
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src/web/public/constants.js
+2 -2
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@@ -79,11 +79,11 @@ function scheduleBackground(fn) {
else { requestAnimationFrame(fn); }
}
// DEC mode 2026 - Synchronized Output
// DEC mode 2026 - Synchronized Output (xterm.js 6.0+ handles natively)
// Wrap terminal writes with these markers to prevent partial-frame flicker.
// Terminal buffers all output between markers and renders atomically.
// Supported by: WezTerm, Kitty, Ghostty, iTerm2 3.5+, Windows Terminal, VSCode terminal
// xterm.js doesn't support DEC 2026 natively, so we implement buffering ourselves.
// xterm.js 6.0+ supports DEC 2026 natively. Constants kept for reference/stripping.
const DEC_SYNC_START = '\x1b[?2026h';
const DEC_SYNC_END = '\x1b[?2026l';
// Pre-compiled regex for stripping DEC 2026 markers (single pass instead of two replaceAll calls)