[BUG] Resize-redraw UI duplication still reproducing on 2.1.119 after #49086 fix

Summary

The fix shipped in 2.1.116 for #49086 (referenced from the close of #46462) does
not fully resolve resize-induced UI duplication. Still reproducing on 2.1.119,
nearly every session.

Environment

• Claude Code: 2.1.119
• macOS: 26.1 (Tahoe, Darwin 25.1.0)
• Terminal: Terminal.app v465
• Shell: zsh
• TERM: xterm-256color

Behavior

• Triggered by terminal window resize (SIGWINCH).
• Reproduces across almost every session, not state-dependent.
• Previous frames remain in scrollback; new redraw stacks below rather than

replacing in-place — same shape as #46462 / #49086.

Workflow impact

Hard friction for resize-heavy workflows (frequent window-size changes between
focused work and reference panes). Ctrl+L clears it but breaks flow on every
resize.

Related

• #46462 (closed as duplicate of #49086)
• #49086 (closed as fixed in 2.1.116)
• #16578 (older redraw issue, closed not-planned)

Happy to capture a screen recording if it helps triage.