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8044eb84dd feat(activity): refine play-method tags and add a Jellyfin-client pill (#387)
* feat(activity): refine play-method tags and add a Jellyfin-client pill

Two related tagging improvements to the admin activity views, squashed:

Split audio transcodes into their own tag. The Play Method summary and
Server Activity popover bucketed every session by its raw play_method,
lumping real video transcodes together with video-copy HLS repackages and
having no separate tag for audio-only transcodes. Classify each session by
the per-stream decisions the backend already reports:
  - video re-encoded        -> "transcode" (yellow)
  - only audio re-encoded   -> "audio"     (red)
  - streams only repackaged -> "remux"     (blue, incl. video-copy HLS)
  - nothing touched         -> "direct"    (green)
ordered direct -> remux -> transcode -> audio across the distribution bar,
legend, method filter/sort, the per-row badge, and the Server Activity
stream counts.

Add a Jellyfin-client "JF" pill. Sessions from a Jellyfin-ecosystem client
(Jellyfin Web, Findroid, Swiftfin, Infuse, etc.) get a purple "JF" pill
next to the play-method tag. Detection is UI-only: isJellyfinSession()
positively matches client_name (set from the Jellyfin MediaBrowser auth
header) and then the raw user agent against the known Jellyfin client
tokens, mirroring the server's client-labeling list. The pill is orthogonal
to the method classification — a session can be both "transcode" and JF.

Pure UI/presentation change; no backend behavior changes.

AI-use disclosure: implemented with AI assistance (Claude Code).

* fix(web): cache-control on SPA shell so deploys bust stale UI

The frontend handler served index.html with no cache directives, leaving
freshness to browser/CDN heuristics. A stale index.html at a CDN edge kept
serving old content-hashed bundles, so a client-side hard refresh couldn't
recover — one browser would show the new UI while another showed the old.

Apply the standard SPA cache policy:
  - index.html (and SPA-route fallbacks): no-cache + a truncated-SHA-256
    ETag, so the shell is cached but revalidated on every load and answers
    an unchanged request with a cheap 304.
  - /assets/* (Vite content-hashed bundles): public, max-age=31536000,
    immutable — cached indefinitely; a new build changes the filename hash,
    which busts them automatically.
  - other stable-named bundled files (sw.js, icons, fonts): no-cache, so a
    changed service worker or icon can't stay stuck in a cache.

Caching is preserved (no no-store anywhere); only the tiny HTML shell is
revalidated, which is what busts a stale UI on deploy.

* fix(activity): compute the method bucket server-side and unify every session surface

Review follow-ups for the play-method tags (PR #387):

- The server now emits effective_play_method (additive field) from the same
  per-stream decisions that drive the badges, so all consumers — web, realtime
  popover, and the Android/Apple admin views later — agree on the bucket
  instead of each client re-reducing raw play_method. Rows with an unknown
  play_method (stale rows from older nodes) stay unbucketed rather than being
  misreported as audio transcodes off the bare transcode_audio flag; the web
  fallback classifier mirrors that and reports "unknown".
- Jellyfin-ecosystem detection moved server-side as is_jellyfin_client, owned
  next to the client-labeling rules so the two lists cannot drift; the web
  token list is gone. Adds kodi/mpv/delfin/finamp, which reach Silo only
  through the Jellyfin compat surface.
- The dashboard stream cards, stats session table, and household streams panel
  now use the same classification as the activity page and popover — they
  previously showed contradictory tags for the same live session.
- One shared method->label/color table in adminActivityPresentation.ts
  replaces the four independent copies (METHOD_META + three switches); the
  method column sort now uses the shared cost-order comparator instead of
  alphabetical; dead "copy"/"hls" order entries removed and the reachable
  "unknown" bucket is styled.

* fix(server): make SPA revalidation RFC-compliant and stop rebuilding the shell per request

Review follow-ups for the SPA cache policy (PR #387):

- Stable-URL bundled files (sw.js, icons, vendor bundles) now carry a content
  ETag. The embedded FS has no modtimes, so http.FileServer emits no validator
  of its own — no-cache alone forced a full re-download of multi-megabyte
  vendor trees on every use because there was nothing to revalidate against.
- Shell and favicon conditional requests go through http.ServeContent, which
  implements RFC 9110 If-None-Match semantics (weak comparison, ETag lists).
  The previous exact string compare never matched once a fronting proxy
  compressed the response and weakened the ETag to W/"...", silently killing
  the 304 path in the most common deployment topology.
- The rendered shell (index read + branding render + SHA-256) is cached per
  branding snapshot via the new Snapshot.RenderKey instead of being rebuilt on
  every request — the 304 revalidation that no-cache makes the common case now
  costs two header writes. The misnamed weakContentETag (it emits a strong
  validator) is renamed contentETag.

* fix(activity): show the JF pill on every session surface, not just the mobile row

Review comments on PR #387: the JF pill only rendered inside Admin
Activity's sm:hidden mobile row, so the desktop table — and the other
session surfaces that now share the method classification — never
identified Jellyfin-compat sessions.

Extract the pill into a shared JellyfinSessionPill component (renders
nothing for native sessions) and drop it into the Admin Activity desktop
client line, the dashboard stream cards, the household streams panel,
and the stats active-session table.

* fix(playback): sync real encode decisions and client identity for compat transcodes

Review comments on PR #387:

- Jellyfin HLS sessions that copy video and re-encode only audio synced as
  full video transcodes: ensureUpstreamPlayback resets transcodeAudio for the
  transcode transport method, and the TargetCodecVideo "copy" decision lived
  only in TranscodeOpts. A new SessionManager.SetTranscodeStreamDetails
  mirrors the actual decisions onto the upstream session when the transcode
  starts (local and remote-node paths, via an optional interface so test
  fakes are unaffected), so these sessions now bucket as "audio"/"remux".
- Transcode recipe cards now record TranscodeAudio derived from the opts
  (only an explicit "copy" leaves audio untouched — empty runs ffmpeg's aac
  default), so a session rebuilt after a restart keeps the same bucket.
- Recipe cards carry client name/version/user-agent, and reconstruction
  restores them, so the admin client label and the JF pill survive server
  restarts; the compat fallback card populates them from the live
  MediaBrowser request. Deliberately not projected into stream-token claims,
  where a user agent would bloat every stream URL.

* feat(api): capability endpoint for the live-session activity fields

Review comment on PR #387: effective_play_method and is_jellyfin_client are
omitempty, so an independently deployed client cannot distinguish an older
server from a supported one reporting an unknown method or a non-Jellyfin
session. GET /admin/sessions/capabilities advertises both fields plus the
closed bucket vocabulary, following the additive capability-endpoint rule
(same pattern as /collections/capabilities).

* fix(playback): treat empty target audio codec as an AAC re-encode in live state

ffmpeg defaults an empty target audio codec to AAC (appendAudioArgs), and the
new recipe logic already records that as an audio transcode — but the live
native path computed transcodeAudio=false for an empty codec, so the running
stream reported remux until a restart flipped it to audio. Extract the
predicate into playback.TranscodesAudio, share it across the live path, the
recipe card, and the compat mirror, and make appendAudioArgs case-insensitive
so the ffmpeg switch agrees with the predicate for any spelling.

Part of #387 review follow-up.

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

* fix(jellycompat): re-sync sessions after recording compat encode decisions

ensureUpstreamPlayback flushes the session (compat_start) before
ensureTranscodeSession / startRemoteTranscode record the actual codec
decisions, and that later mutation triggered no sync — so the admin view
showed a video-copy stream as a full video transcode until the periodic
reconciler ran. Trigger syncSessionsNow after the details are recorded
successfully; the helper is shared, so both the local and remote-node
paths are covered.

Part of #387 review follow-up.

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

---------

Co-authored-by: Quick104 <31828688+Quick104@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
2026-07-18 17:12:36 -04:00
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