feat(tui): replace Textual with a Go/Bubble Tea interface (#941)

docs/contributing.mdx

@@ -8,6 +8,7 @@ description: "Contribute to Strix development"
 ### Prerequisites
 
 - Python 3.12+
+- Latest Go 1.24.x patch (only for Bubble Tea TUI development and release artifacts)
 - Docker (running)
 - [uv](https://docs.astral.sh/uv/)
 - Git
@@ -74,6 +75,22 @@ Skills are specialized knowledge packages that enhance agent capabilities. They
 - Small, focused functions
 - Meaningful variable names
 
+## Package Builds
+
+Editable installs do not require Go; they run the TUI from source (`go run`).
+
+Wheels are intentionally strict: they always bundle the matching Go sidecar and
+are platform-specific.
+
+```bash
+make wheel
+```
+
+The build hook (`scripts/tui_sidecar_hook.py`) requires Go 1.24.x or newer, embeds
+the sidecar as `strix/bin/strix-tui`, and assigns the current platform tag.
+Frozen releases built by `scripts/build.sh` and `strix.spec` also require the
+sidecar.
+
 ## Reporting Issues
 
 Include: