jellyfin, extracted into plugins/jellyfin — the platform half

Eighth extraction, second resurrection. Same shape as soulseek: hono.ts had the
router import and its PROTECTED_MOUNTS entry commented out since 2026-08-13 and
the permission reduced to api: [], so assertPermissionTotality was satisfied,
the server booted clean, and every panel request 404'd. Also closes the same
data hazard — jellyfin_servers was absent from the drizzle barrel, so bun
db:push would have dropped it.

No frontend call site needed repointing: mountPrefix derives /jellyfin from the
appName, which is what the router already hardcoded.

Test fixtures fixed properly rather than re-anchored again. Extracting jellyfin
broke 18 tests, the FOURTH extraction in a row to break the same files — photos
and transmission yesterday, slskd an hour ago, jellyfin now. installer.test.ts
now builds literal CatalogueEntry fixtures and asks the catalogue nothing: it
pins planSteps and runInstall, which are installer logic, and a service leaving
for plugins/ says nothing about whether the installer still plans the right
steps. catalogue.test.ts stays the place real entries are checked well-formed.
members/catalogue/preflight re-anchored to memos, which has jellyfin's exact
shape.

The .prettierignore rule for the vendored hls.mjs moved into the plugin rather
than being left behind naming a deleted path.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/servers/api/jellyfin/router.ts

@@ -1,21 +0,0 @@
-import { createSidecarProxy } from '../../sidecar/create-proxy';
-
-// /api/jellyfin/* — auth, then forward to officer-jellyfin. No routes of its own and no Jellyfin knowledge:
-// this file must never grow app logic.
-//
-// The sidecar owns the Jellyfin contract and holds its credentials.
-//
-// `timeoutSeconds` is generous because this proxy carries VIDEO. A direct-play stream holds one connection
-// open for the length of the film, and the first request against a fresh transcode waits on ffmpeg starting
-// up. The default 60s idle drop would cut both.
-
-const proxy = createSidecarProxy({
-  name: 'jellyfin',
-  prefix: '/api/jellyfin',
-  timeoutSeconds: 3600,
-});
-
-export const jellyfinRouter = proxy.router;
-
-/** Base URL of the sidecar's HTTP server, or null if it hasn't reported in yet. */
-export const getJellyfinServerUrl = proxy.getHttpUrl;