* Normalize branch prefixes and flag invalid ones in settings
A custom branch prefix ending in a slash (e.g. "team/") produced a
double-slashed branch name like "team//feature" that git rejects, and
the raw check-ref-format error gave no hint that the prefix caused it.
- Normalize the configured prefix (trim whitespace, strip leading/
trailing and duplicate slashes) in the shared branch-name builder so
the common trailing-slash case just works, for local and SSH worktrees.
- Validate the prefix on the worktree-create path (computeValidatedBranchName)
so a genuinely invalid prefix fails fast with a clear
"update it in Settings -> Git" message instead of an opaque git error.
- Add a live BranchPrefixFeedback under the Branch Prefix setting: previews
the resulting branch name, warns on invalid characters, and notes when a
prefix collapses to none.
- Keep the background first-work rename on the non-throwing builder since the
prefix is already validated at create time.
* Keep caret in place when editing the branch prefix
The custom branch prefix input was directly controlled by settings, but
updateSettings persists through an async IPC round-trip, so the value
updated a tick late and React re-assigned it, snapping the caret to the
end on mid-string edits. Drive the input from a local draft and only
adopt genuine external settings changes so the caret stays put (and fast
typing survives slow SSH round-trips).
Co-authored-by: Cursor <cursoragent@cursor.com>
* Return ReactNode from BranchPrefixFeedback
JSX.Element needlessly excludes null/string/number returns; ReactNode
keeps the component's return type from over-constraining future changes.
Co-authored-by: Cursor <cursoragent@cursor.com>
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Co-authored-by: Cursor <cursoragent@cursor.com>
