* ✨ Batch multiple thumbnail deletions into a single RPC call
Replace the old per-object immediate thumbnail deletion with a
debounced batched approach. The frontend queues object-ids in state
and waits 200ms before sending a single RPC request with up to 200
object-ids. The backend deletes all matching thumbnails in one SQL
statement with a single RETURNING clause, then touches the affected
media objects.
This reduces RPC overhead when rapidly clearing thumbnails (e.g.
navigating pages) and makes deletions more efficient.
Signed-off-by: Andrey Antukh <niwi@niwi.nz>
* 📎 Fix missing issues
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Signed-off-by: Andrey Antukh <niwi@niwi.nz>
Cache in-progress frame traversals before following parent frame links so thumbnail updates stop recursing forever on cyclic or transiently inconsistent shape graphs.
Add a regression test that covers cyclic frame-id chains and keeps the expected frame/component extraction behavior intact.
Signed-off-by: Andrey Antukh <niwi@niwi.nz>
