chore: release 26.11-alpha

Catalog 26.11-alpha rolls up the Jellyfin compose default-substitution
fix (already on main as 2a31a79) into a tagged release so the
validator CI goes green on every post-Jellyfin commit.

No app additions or schema changes — core 26.11-alpha (auth) is the
substantive release this cycle, catalog just clears its CI red X.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -6,6 +6,21 @@ Versioning: CalVer (`YY.N`) — same scheme as the core Furtka repo.
 
 ## [Unreleased]
 
+## [26.11-alpha] - 2026-04-21
+
+### Fixed
+
+- **Jellyfin compose default-substitution.** Without an `.env` in the
+  jellyfin app dir the CI validator's `docker compose config` step
+  substituted an empty `${MEDIA_PATH}` into `:/media:ro` — which
+  compose rejects as `empty section between colons`. Changed the
+  spec to `${MEDIA_PATH:-/nonexistent}:/media:ro` so the CI syntax
+  check always sees a valid volume even with no env file. Real
+  install flow (form fill → .env with user path) is unchanged; a
+  broken install that reaches `docker compose up` with no
+  MEDIA_PATH now fails loudly on a nonexistent bind target instead
+  of silently mounting something random.
+
 ## [26.10-alpha] - 2026-04-21
 
 ### Added
@@ -72,7 +87,8 @@ Versioning: CalVer (`YY.N`) — same scheme as the core Furtka repo.
   the vendored `furtka.manifest.load_manifest` + cross-checks compose
   volume references).
 
-[Unreleased]: https://forgejo.sourcegate.online/daniel/furtka-apps/compare/26.10-alpha...HEAD
+[Unreleased]: https://forgejo.sourcegate.online/daniel/furtka-apps/compare/26.11-alpha...HEAD
+[26.11-alpha]: https://forgejo.sourcegate.online/daniel/furtka-apps/releases/tag/26.11-alpha
 [26.10-alpha]: https://forgejo.sourcegate.online/daniel/furtka-apps/releases/tag/26.10-alpha
 [26.9-alpha]: https://forgejo.sourcegate.online/daniel/furtka-apps/releases/tag/26.9-alpha
 [26.8-alpha]: https://forgejo.sourcegate.online/daniel/furtka-apps/releases/tag/26.8-alpha