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When submitting a prompt from the home page, the workspace reuses an existing session instead of creating a…

When submitting a prompt from the home page, the workspace reuses an existing session instead of creating a…: a task in LegoFlow-SWE (Harbor dataset). In addition, the home page input field needs to be upgraded from a single-line <input element to an auto-resizing <textarea that supports…

The task

In addition, the home page input field needs to be upgraded from a single-line `<input>` element to an auto-resizing `<textarea>` that supports multi-line input and allows submitting with the Enter key.

Part of Lego-X/LegoFlow-SWE.