fix(tui): separate autocomplete descriptions from labels

[lambertjosh]

What changed

Use an explicit one-column flex gap between autocomplete labels and descriptions instead of relying on leading whitespace inside a sibling text node.

Why

OpenTUI can collapse that leading whitespace, causing entries such as Past chats and Search previous sessions to run together. A layout gap preserves the separation consistently for every autocomplete item with a description.

[lambertjosh]

Before

After

[kilo-code-bot]

Code Review Summary

Status: No Issues Found | Recommendation: Merge

Files Reviewed (2 files)

• packages/tui/src/component/prompt/autocomplete.tsx
• .changeset/tidy-autocomplete-labels.md

lgtm — replacing the leading-space text node with an explicit gap={1} on the existing flexDirection="row" box is the right fix for OpenTUI whitespace collapsing, and matches a pattern used widely across the TUI. Keeping trimStart() is correct since some descriptions carry a leading space in source data (e.g. line 458), so the gap plus trim yields the same one-column separation. Edge cases (missing or whitespace-only descriptions) behave equivalently to before, no new resource/subscription lifecycle is introduced (no leak risk), kilocode_change markers are present on both changed lines of this shared upstream file, and the changeset is present with user-facing wording.

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_{Review guidance: REVIEW.md from base branch main}