Publish harness and TUI open-source

initial sync from the monorepo

crates/codegen/xai-grok-shell/changelogs/0.2.78.md

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+# 0.2.78 — 2026-06-30
+
+## Features
+
+- **Chat sessions show the grok.com model catalog** in the picker.
+
+## Bug Fixes
+
+- **Tabs pasted into the prompt** now align correctly with proper cursor positioning.
+- **Pasting images into dashboard peek replies** now works and survives turn cancellation.
+- **Links in /btw panels** are now clickable and highlight on hover.
+- **Prompt history is now saved** even on fast Ctrl+C quit.
+- **Stuck scrollback text selection** can now be cleared with Esc or any non-drag input.
+- **LaTeX math now renders** inside markdown tables in the TUI.
+- **Background shell commands** started by the agent are now cleaned up when the CLI exits.
+
+## Performance
+
+- **`grok update`** downloads have a longer timeout.
+