tui: ALSA errors flood and corrupt the terminal during interaction

Description

On the V2 beta/next TUI, ordinary interaction can repeatedly initialize ALSA on a Linux host with no sound card. Scrolling through the slash-command picker and continuing to interact with the session prints ALSA diagnostics directly over the TUI, corrupting the display.

Expected behavior: ordinary TUI input should not initialize audio, and subprocess/library stderr should not overwrite the terminal UI.

Representative output:

ALSA lib confmisc.c:855:(parse_card) cannot find card '0'
ALSA lib conf.c:5180:(_snd_config_evaluate) function snd_func_card_inum returned error: No such file or directory
ALSA lib conf.c:422:(snd_func_concat) error evaluating strings
ALSA lib conf.c:5180:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1334:(snd_func_refer) error evaluating name
ALSA lib conf.c:5180:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5703:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2664:(snd_pcm_open_noupdate) Unknown PCM default

The sequence repeats for default, dmix, and dmix:0,0.

Install/channel: npm global install, V2 next channel.
Shell: /usr/bin/zsh.
Terminal environment: tmux (TERM_PROGRAM=tmux, TERM=xterm-256color, COLORTERM=truecolor).
Background service: running at http://127.0.0.1:49374.

Plugins

• @plannotator/opencode@latest
• @ishaksebsib/opencode-tree
• Local clankerhouse-lifecycle.ts

OpenCode version

opencode2 v0.0.0-next-17155

Steps to reproduce

1. Run opencode2 on Linux without an available ALSA sound card.
2. Type / to open the slash-command picker.
3. Scroll through the commands or otherwise interact with the session.
4. Observe repeated ALSA errors written over the TUI.

Screenshot and/or share link

A screenshot is available, showing the repeated ALSA output overwriting the command picker and session UI.

Operating System

Linux 6.1.175-219.359.amzn2023.aarch64 (aarch64)

Terminal

tmux (TERM=xterm-256color)