Credibility pass: the accretion sanded smooth

Blind reviews over d2b40ec..HEAD (engine / web / server+deploy). Orphaned
doc comments rejoined their functions; the swap-meet tradables collapsed
from four pasted deriveds to one (killing the "the's treasure" label);
FEAR's aura and banner now share the engine's own dreadDistance; the
long-press peek got one home; rulebook.ts stopped wearing JSON quotes;
process-named tests and war-story comments now state the constraints they
pin; the protocol doc caught up to its handlers; verify-ledgers.sh can
actually count failures; the runbook learned about the determinism gate
and the nightly backups. No behavior changes — 255 tests and all 48
production ledgers replay identically.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/engine/test/creatures.test.ts

@@ -529,7 +529,7 @@ describe("creatures walk open doorways", () => {
     const view = boardView(state);
     for (const [key, edge] of Object.entries(view.edges)) {
       if (edge !== "door") continue;
-      const [kind, coords] = key.split(",").length ? key.split(":") as [string, string] : ["", ""];
+      const [kind, coords] = key.split(":") as [string, string];
       const [x, y] = coords.split(",").map(Number) as [number, number];
       const side = kind === "V" ? ("E" as Side) : ("S" as Side);
       state.doorStates[key] = "removed";