Double Rendering in Warp Terminal

[qiaoborui]

Problem

Assistant output panel appears twice with identical content in Warp Terminal + fish shell on macOS.

Environment

• Terminal: Warp Terminal (v0.2026.04.15.08.45.stable_02)
• Shell: fish
• OS: macOS (Darwin 25.3.0)
• Rich version: 14.3.3
• Works correctly on: Linux dev server

Expected vs Actual

• Expected: Panel rendered once after streaming completes
• Actual: Panel rendered twice (double)