- MAX_LINK_DISTANCE_KM (default 500): flat cap on link length. Real
Ingress scales this off portal/resonator level (up to ~655km); Regress
has no leveling system to scale off of, so this is a single ceiling.
- PORTAL_TIMEOUT_BLOCKS (default 2100): claims stamp the current Bitcoin
block height (claimed_at_block, new migration) and expire back to
neutral after this many blocks — the game's clock is block height, not
wall-clock. Current height comes from mempool.space (BlockHeightService,
60s cache), same trust model as the BTC Map dependency. A background
sweep actively reverts timed-out claims (tearing down their links, same
as a normal recapture); claim/link routes also check inline so
correctness doesn't depend on sweep timing between runs.
- Pre-existing claims (already live in production) get backfilled with
the real current block height once at startup rather than a guessed
historical value — dry-run verified against an actual copy of the live
production database before deploying.
- Score now reports link count per team alongside places/fields/area
(backend already computed this; only the frontend display was missing).
22 new tests (53 total): pure expiry-logic unit tests plus full
claim/link/sweep integration tests using a network-free fake block-height
provider (BlockHeightProvider interface + FakeBlockHeight test double).
ssmithx
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