Upstream maildev/maildev state of the touched files before f6ee0b5f24

.changeset/fix-cid-attachment-url.md

@@ -1,11 +0,0 @@
----
-'@maildev/smtp': patch
-'@maildev/api': patch
----
-
-Fix the URL that `replaceCidReferences` rewrites inline (CID) attachments to. It
-built `/email/:id/attachment/:file`, which matches no route: the attachment is
-served from `/api/email/:id/attachment/:file`, under the configured base path.
-The URL is now root-relative and includes both parts, so it resolves at the root
-and under a subpath such as `/mail`. A base path that resolves to the root (`/`)
-adds no prefix, so it can no longer produce a protocol-relative `//api/email/...`.