slug_from_query() detects VPC URLs and bare slugs (must contain a hyphen
to avoid treating single search words as slugs). When matched, the search
bypasses the keyword search and shows the plant directly as a VPC result.
Updated search hint text to make this discoverable.
Fixes: VPC search by English name (e.g. "crowfoot") is a VPC limitation —
their search only indexes Latin titles, not custom fields like Engelse naam.
The URL paste workflow is the reliable workaround.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>