feat(tui): add named workspace favorites - #243

Reviewed 6 files; 1 finding. The code index for this repository is cold, so this review saw the diff alone.

No findings.

Fixed since the last review

• after_saving_favorite assumes the saved workspace is at row 0 — not visible in this file's diff; the change here is only the mod tests; declaration, so this concern, if still present, lives in the tests file another reviewer is handling.
• Avoid panicking on serialisation failure — same situation; not touched by this diff.
• after_saving_favorite assumes the saved workspace is at row 0
• Avoid panicking on serialisation failure
• after_saving_favorite assumes the saved workspace is at row 0
• Avoid panicking on serialisation failure
• after_saving_favorite assumes the saved workspace is at row 0 — not present in this file; the function lives elsewhere and this diff only adds type definitions
• Avoid panicking on serialisation failure — no serialisation logic in this file
• after_saving_favorite assumes the saved workspace is at row 0 — not present in the current diff; the test here is a serde round-trip with no row-index assumption
• Avoid panicking on serialisation failure — the only .unwrap() on serialisation is inside a #[test], which is idiomatic and not a production code path