refactor: remove redundant TP check in `browser_accurate`
The `version` variable is already normalized to `"TP"` on line 13, so
the duplicate `eq_ignore_ascii_case("tp")` guard in the
`normalize_version` call was redundant.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
refactor: deduplicate browser alias functions
Extract shared alias match arms from `get_browser_alias` and
`get_browser_alias_lowercase` into a `resolve_alias` helper.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>