Document unicode wrapper trimming and empty-after-trim behavior

Co-authored-by: Eric Allam <eric@trigger.dev>

Author: cursoragent

.changeset/curly-radios-visit.md

@@ -12,5 +12,7 @@ Add a new `@trigger.dev/ai` package with:
 - rejection of internal whitespace characters in normalized `baseURL` values
 - rejection of internal invisible separator characters (e.g. zero-width/BOM characters) in normalized `baseURL` values
 - rejection of invisible separator wrappers around otherwise valid `baseURL` values (for example `\u200B...` and `\u2060...`)
+- support for trimming additional unicode wrapper whitespace (`\u1680`, `\u3000`) while still rejecting
+  values that normalize to empty after trimming
 - deterministic baseURL validation error ordering for multi-issue inputs (internal whitespace → protocol → query/hash → credentials)
 - explicit default `baseURL` behavior (`https://api.trigger.dev`) and case-insensitive `HTTP(S)` protocol acceptance

packages/ai/CHANGELOG.md

@@ -28,6 +28,8 @@
 - Added explicit validation that `baseURL` excludes username/password credentials.
 - Added explicit validation that `baseURL` excludes internal whitespace/invisible separator characters (including zero-width/BOM characters).
 - Clarified that invisible separator characters are rejected even when wrapped around an otherwise valid `baseURL`.
+- Added explicit test/docs coverage for additional unicode-trimmable wrappers (`\u1680`, `\u3000`) and
+  confirmed empty-after-trim values still throw `baseURL must not be empty`.
 - Documented that `HTTP://` and `HTTPS://` are accepted (case-insensitive protocol matching).
 - Added deterministic validation ordering for multi-issue baseURL values
   (internal whitespace → protocol → query/hash → credentials).