The cutaway camera may not walk through a warp mouth

A ray threads a warp and keeps counting; a body cannot. Both cutaway
cameras (reel and live pane) backed down deepestFacing's corridor,
which meant a mouth-adjacent shot could measure its backing room
THROUGH the warp and park the eye off the board — a second of smeared
nothing whenever someone stepped a rim warp. cutawayStand now measures
standable ground, clamping warped rays at the mouth, so the shot stands
on real floor watching the veil instead.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015RCWSTnb1KYTPyL4GmhGnF

packages/web/src/Replay.svelte

@@ -7,7 +7,7 @@
   import { scheduleFx, type BoardFx } from "./fx";
   import { fpFxForEvents, type FpFx } from "./fpv/fx3d";
   import { castRay, edgeMid } from "./fpv/raycast";
-  import { deepestFacing, aimOfEvents, gatherGlides, hurledIn, shortestArc } from "./fpv/director";
+  import { cutawayStand, deepestFacing, aimOfEvents, gatherGlides, hurledIn, shortestArc } from "./fpv/director";
   import { prefs } from "./prefs.svelte";
   import { stackSightTrace } from "@wizwar/engine";
   import type { GameEvent, GameView } from "@wizwar/engine";
@@ -249,8 +249,7 @@
      * corridor, facing it, holding a beat of the world-before so the
      * deed happens ON screen — with the reel's own wizard visible. */
     const takeCutaway = (ax: number, ay: number) => {
-      const a = deepestFacing(v, ax, ay);
-      const d = castRay(v, ax, ay, a).dist;
+      const { facing: a, depth: d } = cutawayStand(v, ax, ay);
       const back = Math.min(1.6, Math.max(0.35, d - 0.4));
       cam.x = ax + Math.cos(a) * back;
       cam.y = ay + Math.sin(a) * back;