[FEATURE]: Small screen compatibility

[tnglemongrass]

Feature hasn't been suggested before.

• I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

As a developer I would like to use OpenCode from inside the VSCode build-in terminal, in order to avoid excessive context switching. VSCode is essential part of my workflow, to review the changes made by the ai.

Current Behavior (available terminal height of 10 lines):

• On Welcome screen:
  • From top to bottom, only the big OpenCode logo and two of the help lines /new, /help are visible.
  • The user input is not visible.
  • I can still type my request blindly, press enter, and it works (it's just a visual bug).
• On Chat screen:
  • header has an empty padding line above
  • chat output is not visible at all
  • The user input occupies three lines, plus one more for model info, plus another one as empty spacer below
  • footer is not visible (good)

Expected Behavior:

• User input field should be visible on Welcome screen.
• Chat output should be visible on Chat screen.
• The Ui may collapse gracefully, hiding less important elements, or replacing them by smaller variants.

Notes:

• Small height is much more important than small width.
• Request is about usage on a 14 inch notebook which has 1280x800 effective pixels.
• Increasing terminal height would cut into the actual VsCode diff view.
• 'Typical' terminal applications like bash, vim or tmux work are perfectly useable under the same conditions.

[github-actions]

This issue might be a duplicate of existing issues. Please check:

• Message layout sometimes not rendered full-width #2428: Similar terminal width rendering issues when using opencode in tmux vertical panes with constrained space
• [UI Error] cursor floats when terminal is a certain size #3271: Cursor positioning problems when terminal is resized to certain dimensions, affecting usability in small terminal windows
• neovim nvim embedded terminal support request #445: Layout issues when running opencode in embedded terminal environments (neovim), showing similar problems with constrained vertical space
• TUI isn't usable in Intellij's terminal #532: TUI usability problems in IDE terminals (IntelliJ), indicating broader compatibility issues with integrated terminal environments
• Create more vertical space by using first line #1107: Request for more efficient vertical space usage by reducing blank lines and headers - directly related to small screen optimization
• Feat: Improve UI customization / accessibility #2750: Request for compact UI mode and customization options for better accessibility and space efficiency

Feel free to ignore if none of these address your specific case.

[rekram1-node]

we are currently rewriting the tui and it may better address some of this, feel free to try it (still a wip): bun x opencode-ai@opentui

[tnglemongrass]

Thanks, will try it!