Three targeted frontend fixes:
1. pdf.js smart preload (thumbnail.js, resourceIcon.js). The first PDF
thumbnail of a session stalled 1-2s on the lazy import of the ~1.3 MB
pdf.js stack. buildResourceIcon() now fires thumbnail.preloadPdf()
the moment a PDF row enters the DOM, warming both the module
(~300 KB, via the now promise-memoized getPdfjsLib, shared with real
users) and the worker script (~1 MB, via a cache-priming fetch —
pdf.js only requests it on first getDocument). Only folders that
actually contain PDFs pay the download; idempotent after first call,
resets on failure so transient offline retries.
2. Admin migration poll cleanup (admin.js). The 2s setInterval kept
hitting the API and updating hidden DOM after leaving the Storage
tab, and polled a failing endpoint forever after session expiry
(!resp.ok returned without clearing). New stopMigrationPolling()
helper, invoked on tab switch away from Storage, on non-running
status, and on failed polls; tab re-entry re-arms via loadStorage().
3. resourceList.js render hoisting. Per-row i18n.t() type-cell lookups
and the fully item-invariant _renderCustomActions() HTML were
recomputed for every row; they now resolve once per batch via
_buildItemLabels() (per-category labels memoized, rebuilt each
batch so locale switches keep working). _findLaneByKey() swaps the
container-wide attribute querySelector for an O(1) _lanes Map kept
in sync at the only lane create/wipe sites.
https://claude.ai/code/session_0193Hff42gaA962wThxMGSd1
_bindItemEvents attached direct click listeners to the favorite star,
the shared badge and every custom action button of every row — ~3+
listeners per row on top of the container delegation the component
already wires, i.e. ~10-15k listeners with a few thousand rows loaded
via load-more, plus the per-row binding cost on every render.
The container's delegated click handler already dispatches by
closest() checks; move the three button behaviours there (they return
before the card-open branch, preserving the old stopPropagation
semantics) and drop _bindItemEvents entirely. Row creation is now
pure innerHTML — no listener allocation per row.
https://claude.ai/code/session_01Dp3oWon5GBMVn4j3QXZdgx
issue: on folder creation view was wiped and displaying only the new folder
fix: add a "new" swimlane if in group mode and scroll up to the new created folder
Claude