Deep-review round 3 of bug hunt 2026-09.
- get_or_404 / owned_or_404 answer a structured {code: "not_found", reason: <what>}
(errors.notFound.* in HU+EN, generic fallback). The structured-404 fix of round 2 had gone into the
ad-hoc `_own_playlist` (CLAUDE.md's "Not" pattern) while the shared helpers stayed string-only, so
views, tags, pins, Plex playlists, invites and users still 404'd in English. `_own_playlist` now
goes through owned_or_404; admin's hand-rolled user lookups use get_or_404.
- A move into a list that is gone names the TARGET (reason "move_target") — "this playlist doesn't
exist any more" was read as the list on screen, which still exists.
- Every refusal in the playlists router is a {code: "playlist", reason} (playlists.errors.* HU+EN)
instead of a bare English string shown verbatim in the Hungarian UI.
- `req` / `uploadReq` mark the errors they already put on screen (the error dialog, the connection
notice, the 401 sign-out), and notifyActionError skips those. The watched toggles, the saved views
and a playlist delete toasted a fault the dialog was already showing; Playlists' two hand-written
status filters now go through the same check.
- D3 snapshotted the removal's TARGET, but whether the player offered Remove still followed the
selected list: launched from Watch later (no Remove, by design), selecting another list under it
made Remove appear — and delete from Watch later. The snapshot now carries the launch list's
editability too.
- Selecting another list under an open player (the command palette works over it) put the page into
"Loading…", and the player was rendered only in the loaded branch — it vanished mid-playback and
came back at its launch video. It now sits at one place in the tree whatever the page is doing.
- A removal takes the video out of the CACHED list as well as the rows: the player's progress
checkpoint rewrote that entry before the refetch landed, handing the membership guard a list that
still held the video — the row came back and the undo history went.
- The watched-state callback refreshed the selected list, not the launch list (D3's sibling).
- `_own_playlist`'s 404 is structured (`{"code": "playlist", "reason": "not_found"}`) and localised:
the bare "Unknown playlist" reached the Hungarian UI in English, which also made round 1's new
`removeFailed` string unreachable. Both Remove and Move report through `notifyActionError` now.
- The "viewer moved on under the confirm" test stepped back only once, which lands on the same video
whether or not the removed one left the queue; it now takes the second step that tells them apart.
The one-step move S2 needs has no honest client-side shape: "add to the target, then
remove from the source" leaves the video in BOTH lists whenever the second call fails,
and the reverse order loses it entirely. So it is one endpoint in one transaction —
POST /api/playlists/{id}/items/{video_id}/move — which re-parents the existing item row
(so `added_at` survives), recomputes `dirty` on both sides, and is idempotent when the
target already holds the video.
Also publishes `updated_at` on the playlist summary, and bumps it explicitly for the
edits that only write `playlist_items` (add / remove / reorder / move). UpdatedAtMixin's
`onupdate` fires on an UPDATE of the playlist row, so without `_touch` the rail's coming
"recently changed" sort would have seen renames and nothing else.
peter