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/fpv/director.ts

@@ -143,3 +143,16 @@ export function deepestFacing(view: GameView, x: number, y: number): number {
   }
   return face;
 }
+
+/** Where a cutaway camera may STAND back from a square: rays thread warp
+ * mouths but a body cannot, so a warped ray's ground ends at the mouth.
+ * Returns the richest heading and how far back real floor allows. */
+export function cutawayStand(view: GameView, x: number, y: number): { facing: number; depth: number } {
+  let deepest = -1, facing = 0;
+  for (const a of [0, Math.PI / 2, Math.PI, -Math.PI / 2]) {
+    const h = castRay(view, x, y, a);
+    const d = h.warped && h.warpDist !== undefined ? Math.min(h.dist, h.warpDist) : h.dist;
+    if (d > deepest) { deepest = d; facing = a; }
+  }
+  return { facing, depth: deepest };
+}