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/web/src/EdgeGlyph.svelte

@@ -1,11 +1,17 @@
+<script lang="ts" module>
+  /** The color states a door can wear (a wall wears none). */
+  export type LockState = "removed" | "jammed" | "held" | "ajar";
+</script>
+
 <script lang="ts">
+  import { holdToPeek } from "./peek";
   // A wall or door on an edge, exactly as the board draws it. Wall-segment
   // effects (locks picked, jammed, removed; doors held) are color states of
   // this one glyph — the game has never used tokens for them.
   let { x, y, kind, state, lock = null, title = null, damage = 0, onpeek }: {
     x: number; y: number; kind: "V" | "H";
     state: "wall" | "door";
-    lock?: "removed" | "jammed" | "held" | "ajar" | null;
+    lock?: LockState | null;
     title?: string | null;
     /** Battle damage taken so far (walls fall at 20, doors at 15). */
     damage?: number;
@@ -23,16 +29,7 @@
     : `${needed} points to destroy`);
   const tip = $derived(`${title ?? (state === "door" ? "a locked door" : "a wall")} — ${hp}`);
 
-  // Press-and-hold peeks the segment, mirroring the board's cell gesture.
-  let timer: ReturnType<typeof setTimeout> | null = null;
-  function press() {
-    if (!onpeek) return;
-    timer = setTimeout(() => onpeek?.(tip), 450);
-  }
-  function release() {
-    if (timer) clearTimeout(timer);
-    timer = null;
-  }
+  const { press, release } = holdToPeek(() => onpeek?.(tip));
 </script>
 
 {#if kind === "V"}