[Bug] TUI Layout Corruption: Unicode/Chinese characters and icons display as ;w=1; and artifacts #15669

Description

Environment:

OS: Ubuntu 22.04.5 LTS (Jammy Jellyfish)

Application: OpenCode

Model Config: Qwen3-Coder-32B

Terminal: (e.g., GNOME Terminal, Alacritty, or VS Code integrated terminal)

Locale:

locale
LANG=en_US.UTF-8
LANGUAGE=
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=en_US.UTF-8

Description:
The Terminal User Interface (TUI) is not rendering correctly on Ubuntu 22.04. The interface is littered with raw escape sequences and width-calculation artifacts like . Additionally, Chinese characters are displayed as garbled text or replacement blocks, making the interface unreadable.;w=1;

Expected Behavior:
The TUI should display clean borders, icons, and legible Chinese characters. The layout should be properly aligned without raw width-parameter strings appearing in the UI.

Actual Behavior:

Icons/Symbols are replaced by white blocks and strings like .;w=1;

Chinese text input and output are garbled (encoding error).

UI dividers and progress bars are misaligned.

Steps to Reproduce:

Open the terminal on Ubuntu 22.04.

Launch OpenCode.

Observe the header, footer, and any Chinese text prompts.

Plugins

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OpenCode version

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Steps to reproduce

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Screenshot and/or share link

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Operating System

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Terminal

No response