Credibility pass: the session seams sanded from the clips-and-camera batch

Two blind reviews of everything since the last pass (afa0e17), every
finding checked against the code, no behavior changed: all thirty
scene goldens match without a re-bless and the engine suite is
untouched.

Reel and renderer: the camera's look-down rule is stated once, beside
LOOK_DOWN, instead of twice in the effect; the empty aim branch that
stood where a cutaway used to be is gone (the guard it implied is now
explicit); the pit events and the punch are handled by their own
types, not through "in" casts; smoothstep is one export used by every
tween instead of eleven inline copies; the two floor rings share one
painter; project() takes a Billboard instead of a third hand-typed
copy of its fields; the strides-left figure and the web rim no longer
shadow the reel's steps and the pane's fx; the die card's verdict is
built from events, not by matching an emoji; the workshop asks for the
hover cue by name instead of passing an empty click handler.

Server and engine: one requestBase() for the origin, one slug pattern
in store.ts gating both the clip page and its files, one 404 for both;
LOOPBACK sits above its only caller; doCounteract names what a counter
is played against once; fearCells sits beside its own docblock rather
than between sightedCellsFor and its.

Deploy: chromiumExe, the private server, ffmpeg, and the reel rewind
live in deploy/lib/harness.mjs, shared by the gate, the recorder, and
the card cutter instead of pasted three times; the recorder drops its
duplicate frame counters and names its poster settle; the card uses the
gallery's exact gold; the one-time Sentry URL bootstrap leaves
deploy.sh; the backup comment states the rule rather than the incident.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jm2auWk6RP71CjaAb4FMoG

packages/web/src/LiveFirstPerson.svelte

@@ -10,7 +10,7 @@
   import FirstPerson from "./fpv/FirstPerson.svelte";
   import type { FpvTarget } from "./fpv/raycast";
   import { objectArt, tokenArt } from "./art";
-  import { fpFxForEvents, type FpFx } from "./fpv/fx3d";
+  import { fpFxForEvents, smoothstep, type FpFx } from "./fpv/fx3d";
   import { castRay, SIDE_ANGLE, OPPOSITE } from "./fpv/raycast";
   import { cutawayStand, deepestFacing } from "./fpv/director";
   import { aimOfEvents, gatherGlides, hurledIn, shortestArc } from "./fpv/director";
@@ -176,7 +176,7 @@
     const t0 = performance.now();
     const tick = (now: number) => {
       const w = Math.min(1, (now - t0) / 180);
-      cam.facing = from + (to - from) * (w * w * (3 - 2 * w));
+      cam.facing = from + (to - from) * (smoothstep(w));
       if (w < 1) requestAnimationFrame(tick);
       else turning = false;
     };
@@ -267,7 +267,7 @@
     let raf = 0;
     const tick = (now: number) => {
       const w = Math.min(1, Math.max(0, (now - t0) / dur));
-      const ease = w * w * (3 - 2 * w);
+      const ease = smoothstep(w);
       const next: Record<string, { x: number; y: number }> = {};
       for (const m of moves) {
         next[m.id] = { x: m.fx + (m.tx - m.fx) * ease, y: m.fy + (m.ty - m.fy) * ease };
@@ -403,7 +403,7 @@
       } else if (walkMs > 0 && t < turnMs + walkMs) {
         cam.facing = fromF + arc;
         const w = (t - turnMs) / walkMs;
-        const ease = w * w * (3 - 2 * w);
+        const ease = smoothstep(w);
         cam.x = fromX + (tx - fromX) * ease;
         cam.y = fromY + (ty - fromY) * ease;
       } else {