packages/skatespots-background: a local Capacitor Android plugin that polls our
own push-service /pending and raises local notifications. Modes: off / standard
(WorkManager ~15 min) / fast (foreground service ~5 min). Kotlin +
AndroidManifest (POST_NOTIFICATIONS, FOREGROUND_SERVICE_DATA_SYNC, WAKE_LOCK,
battery-exemption) + Gradle module. Client: useBackgroundDelivery (registers a
poll token via NIP-98, seeds the plugin) + a Background delivery (Android)
control in NotificationSettingsCard. The app registers by NAME, not by importing
the package, so the web bundle is unaffected. UNVERIFIED - needs cap sync + a
device.
Adds the content-free activity cursor the Android APK can poll from a native
worker: POST /native/poll/register (NIP-98 -> poll token; the pubkey joins the
relay watch), GET /pending?token&since -> { seq, at, changed }, and
/native/poll/unregister. pushTo() bumps recordActivity(). Verified locally:
register -> offer addressed to the pubkey -> seq 0 -> 1, changed=true. No Google,
no decryption; the native plugin is the remaining piece.
Server: /native/subscribe + /native/unsubscribe (NIP-98 proof), FCM device store,
and FCM HTTP v1 sending (service-account OAuth2, cached ~1h); /health reports
native + device count. 503 without PUSH_FIREBASE_SERVICE_ACCOUNT_JSON.
Client: @capacitor/push-notifications (lazily imported, native-only) in
usePushNotifications - request permission, register, store the FCM token, and
subscribe via /native/subscribe; tap deep-links into the app.
Needs a Firebase project: google-services.json + the Gradle plugin (android/),
and the service-account JSON in the host .env.
A pure swap has no invoice, so ListingTradeActions now offers a 'Good-faith
deposit' input for price_type=trade listings. Paying it stores a deposit-slot
receipt (saveReceipt(coord, r, 'deposit')); the buyer's confirm attaches it as
['proof','deposit',preimage,payment_hash] with method=trade, so a barter carries
a verifiable COST without pretending the goods were proven.
- getPaymentHashFromBolt11 (bolt11.ts, dependency-free; matches the BOLT11 spec
test vector) + verifyPreimage (sha256(preimage) === payment_hash).
- usePayPaymentPointer captures the preimage from NWC/WebLN/melt and returns a
PaymentReceipt; PayWithSats.onPaid carries it; stored device-locally so the
later confirm step attaches it; publishTrade writes
['proof','lnpreimage',preimage,hash] (and ['proof','deposit',...] for barter).
- useTradeReputation verifies and counts it in paymentVerified.
- Honest scope: proves PAYMENT, not delivery; money legs only - a pure hardware
swap has no invoice, stays attested; a deposit receipt gives barter real cost.
- HandoffHelper suggests the 3 nearest public skate spots to the listing as
one-tap DM meetup templates (public data only; never the viewer's location).
- New addressable kind 34967 + useShipmentStatus + ShippingStatusCard: seller
marks shipped, buyer received, either issue. p-tagged so the push service
notifies (added to MARKET_KINDS); d=ship:<listing-d>:<author> so a status
replaces only its author's.
- Honest framing: a self-reported claim, NOT proof - 'received' does not release
escrow; no address stored; parcel photos with an address discouraged.
- ['shipping','buyer'|'seller'|'split'] tag + create-page selector.
- Distance from the viewer's last known location (cache only, no GPS prompt) on
both gear cards, and a 'Nearest (local)' sort on GearSwapPage.
- HandoffHelper (buyer-only, in ListingTradeActions) opens the trade DM
pre-filled: suggest a time & place / share delivery details / use a locker,
with anti-scam copy. Details stay in the NIP-17 DM; the app never sees them.
- ships deals now nudge safety on all platforms, not just when escrow is ready.
pow.ts: minePow/verifyPow/countLeadingZeroBits. PoW pays NO ONE - it is a free
CPU tax, not a fee. useNostrPublish accepts pow and mines the nonce on the
UNSIGNED event before signing (id is signature-independent -> one signer prompt).
CreateListingPage sends 16 bits per listing (~80ms) and 20 bits when a newcomer
chooses work instead of the 1,000-sat fee (SpamFeePayment.onPowInstead = the free
alternative). parseMarketplaceItem exposes powDifficulty; the card shows a PoW
badge at >=16.
useTradeIntegrity.ts adds two anti-sybil levers to TradeReputationCard:
- useBatchActivity counts each counterparty's published spots+listings and weights
their contribution by min(1, activity/3), so a ring of empty accounts
contributes ~0 even when cross-confirmed.
- useTradeRings does a 2-hop query of the partners' own attestations and measures
closedness (share of partner-partner trades); >=3 partners with >=0.5 closedness
flags a closed cluster. PoW (NIP-13) remains, but needs mining at publish.
- Listings carry optional ["fulfilment","pickup"|"ships"|"both"] (selling only):
a create-page selector (default pickup), a card badge, and a Pickup/Ships filter
on GearSwapPage. The app NEVER collects an address - a ships deal exchanges it
privately in the NIP-17 trade chat, and ListingTradeActions nudges escrow for
shipped deals. No KYC rail, no labels, no carrier API.
- TradeReputationCard adds a low-diversity ring warning (verified >= 5 across <= 2
people) beyond the single-partner one.
A trade proof of ['proof','zap','<receiptId>'] is now checked by verifyZapReceipt
(kind-9735 signature + p = seller + decodable bolt11 amount + embedded 9734
request) and counted as paymentVerified, shown on TradeReputationCard as
'payment-verified (zap receipt)' - a real tier above the self-reported claim.
Honest ceiling: proves the seller's LNURL provider acknowledged a payment, not
that goods changed hands. NIP.md documents the zap proof variant.
A price_type=fixed listing now shows a direct 'Buy with sats' button in
ListingTradeActions (card + detail) - no negotiation needed. The price resolves
to sats (SATS directly, USD via useUsdToSats) and pays through PayWithSats (NWC ->
WebLN -> Cashu melt, falling back to the seller's lud16). The sheet mounts only
while open so the wallet hooks stay off every grid card. Reuses the accepted-offer
Pay rail.
The service now also subscribes to marketplace events addressed to subscribers
(kinds 30403/31872/31871) via #p filters built from the live subscription set,
re-subscribed on every subscribe/unsubscribe. Payloads stay generic ('New offer
on your listing', 'Your offer was accepted') - never the amount or item. Verified
locally: subscribe -> offer to #p -> push attempt.
The proof tag is self-reported and unverifiable client-side, so it must not read
as proof of payment. useTradeReputation now exposes withPaymentProof (mutual
trades carrying a proof), shown on TradeReputationCard as 'with payment proof
(self-reported - not verified)' distinct from the verified count.
The marketplace 'Sats Traded' was a naive sum of the self-reported amount tag on
31871, which two colluding accounts could inflate for free. tradedSats is now the
robust figure - mutual trades only (a listing attested by >=2 distinct pubkeys),
per-pair cap 3, amounts >1 BTC dropped - with tradedCount + tradedTraders, and
tradedSatsClaimed keeps the raw claim so the card shows both. Added query fields
=> PERSIST_BUSTER v5. No trade attestations exist on the relay yet (honest 0).
- public/push-sw.js: shows the content-free push; tap focuses/opens the app.
- src/lib/pushService.ts + usePushNotifications: register the SW, subscribe with
the service's VAPID key, sign a NIP-98 challenge proof, POST /subscribe.
- NotificationSettingsCard: a 'Background notifications' toggle (opt-in,
per-device) + honest metadata copy; corrected the now-stale 'we run no push
server' note.
- useSendDirectMessage: marks the RECIPIENT wrap ["skatespots","push"] (never
the self copy) and adds the community relay as the notify relay so the push
service sees it.
- /privacy: discloses the push server sees metadata only.
Our own keyless Bun service (not Linky's): watches relays for kind-1059 wraps
carrying the plaintext marker ["skatespots","push"] on the recipient copy,
extracts only {recipient, wrapId}, and sends a Web Push. NEVER decrypts - the
client fetches + decrypts the named wrap itself.
Endpoints: GET /health, GET /vapid-public-key, POST /auth/challenge ->
/subscribe|/unsubscribe with a one-time NIP-98 (kind 27235) challenge proof.
State is a JSON file; VAPID keys from env. Wired like the other standalone
servers (typecheck:push + check:push in npm test, deploy:push, Caddyfile +
systemd unit). Verified locally end-to-end: auth -> subscribe -> marked wrap ->
watcher -> push attempt, and proof replay rejected.
Client half (service worker, subscribe hook + Settings toggle, marker on DM
sends) is the next step.
Phases 1-2. The seller may attach a ["payment", value, kind] pointer to the
accepted 30403 message (lninvoice|lnaddress|creq|clink, optional payment_hash);
ListingOffersPanel attaches the seller's own lud16 on accept, falling back to
their profile lud16 on the buyer's side. The pointer rides the accepted event so
it flows through the existing decrypt-free trade notification path (a NIP-17 DM
can't reach the Trades tab without decrypting).
Buyer gets a 'Pay with sats' button -> PayWithSats dialog -> usePayPaymentPointer
pays via NWC -> WebLN -> Cashu melt (mirrors useZaps). Nothing is held or signed
by us; recording the trade stays the existing 31871 flow. creq/clink are
recognized but not payable yet. No new event kind.
Numo (and other POS) emit a BIP21 'bitcoin:?creq=...&lightning=...' QR. The
scanner treated it as 'unknown', so a Numo terminal couldn't be paid at all.
classifyQRCode now parses BIP21, extracting lightning= (paid via the existing
NWC/Cashu-melt path) and creq=, and recognizes standalone NUT-18 creq1.../creqA...
as a new 'cashu_request' type. cashu_request is recognized but not payable yet -
CashuWalletCard shows an honest message. BIP21 parsing avoids URLSearchParams so
a raw creqA... base64 '+' isn't coerced to a space.
Create/edit geocoding used Nominatim alone, so when it failed (e.g. the 429) a
new spot published with no city/country and landed in 'Uncategorised'. Now
reverseGeocodeRegions() tries Nominatim, then falls back to BigDataCloud's
client-side reverse-geocode-client, so a spot is region-tagged by default. Still
never throws (an outage can't block a publish); the spot keeps its geohash and
the stats' read-time derivation can still place it. derivedRegions reuses the
same geocodeBigDataCloud helper (one implementation).
Nominatim returned 429 for our IP because the read-time derivation runs from
every viewer on every load — its usage policy forbids that, and a 429 makes
reverseGeocodeRegions() (which returns empty on !res.ok) fail silently, freezing
the resolve counter and stalling the region card.
The stats fallback now uses BigDataCloud's reverse-geocode-client (no key, CORS
on both hops, English countryName/countryCode/city), spaced ~300ms. Nominatim
stays for create/edit geocoding only (author-initiated, one call per spot).
/privacy now names both providers.
Two issues from the first derived-regions pass:
- The 'Resolving N...' counter only updated when the whole pass finished, so it
looked frozen. fillDerivedRegions now reports progress per pin, the hook ticks
the counter down, and the card refreshes every 5 resolved pins so the numbers
climb while you watch.
- A country could appear twice ('United Kingdom' 1 + 1) when one pin carried a
country_code and another only a name. Learn name->code from pins that have
both and fold name-only pins into the same bucket.
The region card only placed pins carrying a city/country tag, so legacy pins
(coords but no tag) drew on the map yet landed in 'Uncategorised' — the map and
the stats disagreed. useGrowthStats now falls back to a cached reverse geocode
of the pin's own coordinates (lib/derivedRegions, localStorage keyed by ~110m
coords). useDeriveRegions (mounted on /stats) fills cache misses at 1.1s spacing
for Nominatim's 1 req/s policy and invalidates growth-stats; the card shows a
'Resolving N...' note meanwhile. Display-only fallback; the admin backfill still
writes real tags. Read-time geocoding disclosed on /privacy.
The admin backfill lived only in Settings -> Advanced, so an admin staring at
the 'Uncategorised' row had no obvious way to fix it. Render the admin-only
RegionBackfillCard inline in the region section when uncategorised > 0, and
clarify the zero-state (remaining untagged pins belong to other mappers).
Spots created before reverse geocoding have coordinates but no city/country
tag, so the map draws them while /stats can only show "Uncategorised". Counted
on the canonical relay: 54 raw -> 43 after admin-hide -> 13 tagged / 30
uncategorised, and 21 of the 30 are the two admin accounts' own pins.
useRegionBackfill finds the logged-in user's own untagged spots/shops, decodes
each pin's coords (lat/lon else geohash), reverse-geocodes via the shared
reverseGeocodeRegions(), and republishes the addressable event with the region
tags added - preserving every existing tag. Publishes to getWriteRelays()
(community + author) so the canonical stats see it, spaced 1.1s for Nominatim's
1 req/s policy. Surfaced as an admin-only RegionBackfillCard in Settings ->
Advanced.
EditSpotPage rebuilds eventTags from scratch, so saving a spot replaced the
addressable event WITHOUT its city/country/country_code — silently losing the
region tags it had. It also meant re-saving a legacy spot could never fix a
missing tag.
Both edit pages (and both create pages) now go through the shared
reverseGeocodeRegions()/pushRegionTags() helper, so region tags are re-derived
on every save. Re-saving a legacy spot now tags it.
Docs: AGENTS.md (any page that republishes an addressable event must
re-derive or preserve its region tags).
A spot the community has hidden as 'not a skate spot' no longer inflates the
community numbers.
- useGrowthStats calls useAdminModeration() and drops hidden content inside
dedup(), so it's excluded from totalSpots, the region breakdown and the
trusted counts (kind-agnostic: the coord is built from each event's own kind).
- The hidden-set sizes are part of the query key, so the stats recompute once
the labels load.
- Region footnote says 'community relay only, with moderation-hidden content
excluded'.
This narrows the map<->stats gap. The remaining deltas are legitimate and
documented in AGENTS.md (untagged pins; auto-hidden spots).
Answers 'why don't the map and stats match' by making the gap visible, and
brings shops into the region breakdown.
- src/lib/geocodeRegions.ts is now the single reverse-geocode helper (spot
create, shop create, shop edit), so the Nominatim call + Accept-Language + the
parse rules can't drift. Never throws.
- Shops now publish city/country/country_code (previously none), so they can
appear in the region breakdown.
- Stats: regions cover spots AND shops; a new 'Uncategorised (N)' row plus a
'{N} of {M}' footnote let the card reconcile with the location total. Section
retitled 'Spots & Shops by Region'.
- PERSIST_BUSTER v3 -> v4.
- /privacy: wording now 'spot or shop geocoding'.
The map deliberately still reads the community relay + the reader's relays
(forcing canonical would hide an opted-out user's own spots) - documented.
Answers 'how are these accounted?' and fixes the privacy-page gap it exposed.
- Spot creation now also publishes ['country_code', <ISO-3166-1 alpha-2>], kept
alongside the display 'country' name so existing search/display still work.
- Stats group countries by country_code when present, else a lowercased name;
the label is the most common raw name in the group, so a localised spelling
can't split one country across two rows.
- The tail beyond the top 6 is surfaced as an 'Other' row, and the section is
relabelled 'Spots by Region' (it counts spots, not people) with a footnote.
- PERSIST_BUSTER v2 -> v3 (GrowthStats shape changed again).
- /privacy: disclose OpenStreetMap Nominatim — spot geocoding sees your IP and
the spot's pin (never the device's GPS). It was missing from the IP list.
Docs: AGENTS.md.
/stats slammed with 'Cannot read properties of undefined' for anyone whose
IndexedDB held a growth-stats cache saved before the new fields existed —
stats.topCountries.length threw.
- Bump PERSIST_BUSTER v1 -> v2 (the documented way to invalidate a shape change;
it is wired into App.tsx).
- Read the new fields defensively (stats?.x ?? []) so a future field can't do
this again.
- AGENTS.md: note that the smoke test cannot catch this (clean profile, no
persisted cache).
Three improvements to /stats.
1. A relay outage must not read as real zeros. Every sub-query swallowed its
error, so a failed relay rendered a full board of 0s. The queryFn now counts
failures and returns 'partial'; the page shows 'Couldn't reach every relay —
these numbers may be incomplete'. Badge also gains 'updated Nm ago' + Refresh.
2. Surface more of the community: Marketplace (live listings, completed trades,
self-reported sats, cash/barter split) and Regions (top countries/cities from
each spot's own tags). Zap receipts are counted ONLY for the top contributors
and labelled as not-global-volume, because global zap volume isn't measurable
on a public relay.
3. Mobile/desktop: collapse the 13 Lab cards on mobile behind 'Show all' (a
display:contents wrapper keeps them grid items); widen max-w-6xl -> max-w-7xl;
StatCard gains a compact prop so big sats don't overflow.
Docs: AGENTS.md community-stats note.
The 'New here?' banner was a later sibling of the absolute toolbar inside the
same map container, so it became the first in-flow child at y=0 and the floating
toolbar painted over it — the search bar covered the banner.
Move the banner to be the container's first child (above the toolbar) and have
the toolbar drop into flow when the banner is shown, so it can't cover it while
still floating over the map otherwise. Desktop is unchanged (md:static).
Docs: AGENTS.md map-layout note.
Two Nostr-native auth upgrades (read-only npub sessions were declined).
NIP-49 (src/lib/ncryptsec.ts):
- Login: the Secret Key tab gains an 'Encrypted (NIP-49)' mode — paste
ncryptsec1… + password -> decrypt -> login.
- Signup: the done step's key card exports a password-protected backup, which
is safe to keep in cloud storage (unlike a raw nsec).
- Verified in Node: round-trips; wrong password, non-ncryptsec and empty
password all rejected.
NIP-46 nostrconnect (src/lib/nostrConnect.ts):
- Desktop -> phone pairing via QR. Nostrify implements only the bunker
direction; nostrconnect is signer-initiated, so the handshake lives here
(ephemeral client keypair + secret, subscribe kind 24133 #p:[clientPub],
reply {id,result:secret} signed with the ephemeral key), then hands the
derived bunker:// URI to login.bunker().
- Try NIP-44 then NIP-04 (the transport moved NIP-04 -> NIP-44; support varies).
- LoginDialog's Bunker tab leads with the QR; bunker:// paste stays a fallback.
- NOT verified against a real signer — needs an on-device Amber check.
Docs: AGENTS.md.
Owner feedback: the route dialog's map still dominated the phone screen, and
the 'nothing leaves to Google or Apple Maps' tagline cluttered the chrome.
- Map: 50vh -> 34vh on mobile (min-h 300 -> 220); desktop 440 -> 400. Follow
mode 60vh -> 54vh, so the bigger map is kept only when you need it.
- Drop the visible tagline from the route header (kept sr-only for a11y); the
promise now reads on /privacy -> 'What leaves your device' -> Directions
('routing stays in the app; start/destination are never handed off to Google
or Apple Maps').
Docs: AGENTS.md map-layout note.
The deploy timer can record a dirty-tree skip mid-edit; once the tree is clean
that reason is stale. Verify git status before flagging it (and parse the timer
NEXT row only when it is a real timestamp).
Builds out the rest of the transit UX from data Transitous actually provides.
- Time picker: Leave now / Depart at / Arrive by (MOTIS time + arriveBy).
- Mode filter: Bus/Tram/Metro/Train/Ferry groups -> MOTIS transitModes.
- Stop departure boards: tap a stop name -> MOTIS stoptimes, with live and
cancelled badges and a feed-provided platform hint.
- Fares: MOTIS carries NO prices (verified live: debugOutput.fares=0,
agencyFareUrl empty), so a 'tickets' link is shown ONLY when the feed supplies
an operator fare URL - never an invented price.
New src/lib/transitUi.ts holds the mode vocabulary (emoji/colour/groups) so the
itinerary and the board cannot drift; StopDepartures.tsx is its own dialog.
Docs: AGENTS.md transit note.
A push seconds before an ops-health run has no skip reason yet — that is
normal, not a problem. Only flag a missing skip reason once the deploy script
hasn't run for >6 min (i.e. the timer really looks stopped).
Transit showed one cryptic summary line and threw away 3 of 4 itineraries.
Surface what the MOTIS/Transitous response already contains.
routing.ts: TransitLeg gains headsign, agencyName, from/to track, stop count,
realTime and distance; RouteResult gains transitOptions (all itineraries,
fastest first). fetchTransitRoute maps every itinerary (the API returns more
than numItineraries).
RouteDialog:
- Alternatives row — tap to switch; a dedicated effect redraws the map from the
selected itinerary, so switching never re-queries the service.
- Leg-by-leg itinerary: coloured line badge, headsign, board/alight stop + clock
times, platform track, N stops, operator, and a 'live' badge only when the
feed is realtime.
- Summary now reflects the selected option and shows the option count.
- 'Whole route' re-fit follows the selection.
Also clears the 2 pre-existing eslint warnings (unused StatusIcon/nip19) so the
documented zero-warning baseline holds.
Docs: AGENTS.md transit-detail note (incl. Transitous 403s a generic UA).
A non-site-only skip advances the recorded sha without a production deploy,
so 'deployed Nm ago' could read as if that sha was deployed. Say 'last
production deploy Nm ago' instead.
Two failures today were invisible: the ngit/Amber remote signer stalling
mid-push, and the deploy timer skipping while origin/main had moved.
- scripts/auto-deploy.sh records the reason for every skip (and the run time)
to ~/.local/state/skatespots-deploy/{last-skip,last-run}.
- scripts/ops-health.sh reads that back and prints repo/push sync, the skip
reason, the throttle window and timer health; exit 1 when action is needed.
--probe-push runs a bounded real push (the only true signer probe),
--notify desktop-notifies (deduped), --quiet is silent when healthy.
- Periodic watch: skatespots-ops-health.{service,timer} (every 15 min) plus
scripts/install-ops-health-timer.sh.
Docs: AGENTS.md Deploy section.
The stash is one replaceable NIP-44 blob, so a naive last-write-wins publish
silently dropped whatever another device added. Make it merge.
- StashItem.updatedAt (last edit, falls back to addedAt) and a top-level
Stash.deleted[] of {id, at} tombstones so deletes aren't resurrected.
- export mergeStashes(): union by id, newest stamp wins, tombstones win at/after
the last edit; tombstones pruned (180d / 500).
- fetchLatestStash() merges the live remote with the list already held (query
cache -> closure) and toasts when the other device contributed.
- Writes now require a confirmed relay read: assertConfirmed() refuses an
unconfirmed base so useNostrPublish can't queue a pre-signed blob that would
overwrite a newer edit later. Reads still work offline from cached ciphertext.
- StashPage surfaces the refusal via onStashError on every mutation.
Docs: NIP.md multi-device merge section; AGENTS.md updated.
Signup and onboarding are the first impression, so tighten both.
Signup (SignupDialog):
- Add a Choose -> Profile -> Save key step indicator.
- Make backup a confirmation, not a skip: an "I've saved my recovery code"
checkbox enables "Let's skate" (downloading the key also sets it); the old
co-equal "Skip for now" is now a quiet link.
- Fix copy that contradicted step 3 ("nothing to remember") and warn that a
signer may ask to approve the profile publish.
- Platform-aware signer nudge instead of implying a recommendation.
LoginArea: drop the dead SignupMethodDialog/MnemonicSignupDialog wiring (never
opened) and rename the misleading nsecSignupDialogOpen state.
Onboarding: add a "Where do you skate?" first step (Use my location caches the
fix so the map opens on the skater's area) and remove the dead disabled
"Log in first" button.
The Wishlist tab lived only in the encrypted stash, so 'I want an 8.25 deck'
was invisible to sellers. A public want (itemType wtb) now publishes a real
NIP-99 listing with listing_type=wtb (tag stash-want, price = what they'd pay),
which the Marketplace already surfaces under its WTB filter; the encrypted
Wishlist keeps the private copy.
- buildListingTags handles the want case (no showcase tag, listing_type=wtb,
no condition); syncItem no longer skips wtb.
- StashPage drops the item.itemType !== 'wtb' showcase guards (add/edit/bulk).
- AddItemDialog defaults wants to PUBLIC (a want is meant to be seen) and the
visibility hint + wishlist teaser explain where it goes.
- Filter bar gains a Sort select (Newest / Value / Condition / A-Z) and search
now matches size too.
- 'Public stash' card lists which items are public with a link to your profile
('see what others see').
- Bulk actions: a header Select toggle puts rows/cards into multi-select
(checkbox + click-to-toggle, per-item actions hidden) with a fixed action bar
-- Public / Private / For sale / Remove -- backed by new bulkSetVisibility /
bulkSetForSale / bulkRemove mutations that each do ONE re-encrypt, plus a
bulk-delete confirm. Showcase sync/unpublish runs per affected item.
The private stash was deny-listed from persistence with no local cache, so an
offline or relay-outage cold start showed an EMPTY stash even though decrypting
needs no network.
- offlineCache v2 adds a 'stash' table storing the encrypted CIPHERTEXT (never
the decrypted list). useStash caches it on every successful fetch, and both
the read query and fetchLatestStash (the pre-write re-fetch) fall back to it --
so the stash loads at the park and an offline edit rebuilds from the real list
instead of throwing.
- /stash gains a 'Backup & transfer' card (desktop sidebar + mobile) with
Export (a JSON you control) and Import (one re-encrypt, skipping
title+category+size duplicates).
