Fixes from gekh's re-review of 061d269, each with a regression test that
fails on the old code:
- A pan that drops a tile still loading now settles the loading count
(the aborted request no longer owns its key, so its `finally` never
did), and purges the previous zoom's tiles once nothing is pending.
LOADING no longer sticks on the status pill and chip.
- Zoom 0 (above 15,000 km) is a zoom: `zoom == null` instead of `!zoom`.
- A pose that arrives after a photo was closed is dropped, in the
MapillaryJS adapter and in the viewer host, so the marker and sequence
selection do not come back.
- Ground casting passes the tile's signal to the terrain request, so a
cancelled tile stops its height batch instead of holding the queue.
- The server's in-memory tile cache honours the 24 h TTL like the disk.
- The viewer's one-time resize runs for every photo, not just the first.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
fetchTile coalesced concurrent requests for one tile onto a single
upstream fetch, but that fetch ran on the first caller's signal. When the
first request was abandoned (an older pan), every joined request lost a
tile it still needed; and a joined caller that aborted stayed subscribed
until the shared fetch finished.
A flight now owns its AbortController and counts waiters, the pattern the
weather and wind providers use. Each caller's own abort rejects that caller
at once; the upstream fetch is cancelled only when the last waiter leaves,
and a later request after that starts a fresh fetch.
Regression tests (fail on the previous tiles.js, pass now): a joined
request survives the first caller aborting with one upstream request; a
joined caller that aborts leaves at once while the first still gets the
tile; both waiters leaving cancels the owned fetch.
Reported by kvnloo in review.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
Camera-driven Mapillary coverage (z0–5 overview points from orbit, z11–14
ground-clamped sequence lines below 60 km), per-sequence image cones, an
embedded MapillaryJS viewer bridge with a camera-follow mode, sprite icons
for map features, and a query engine that turns a plan into a streamed
z14 tile fan-out. Registers an on-globe CC BY-SA 4.0 credit while enabled.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
