feat: ripple-extend resize, timeline filmstrip, export hardening

Yesterday's verified web session (gates green: 316 tests, tsc, build):
- ripple-extend pushes right-hand chain on static-element resize
- per-position video filmstrip thumbnails with zoom-adaptive density
- fps-aware export bitrate, 2s keyframes, even-dim export canvas
- freeze frame uses fixed 3s duration, prompt removed

1 files changed, 0 insertions, 72 deletions

diff --git a/apps/web/src/actions/freeze-frame-store.ts b/apps/web/src/actions/freeze-frame-store.ts
deleted file mode 100644
index 17102780..00000000
--- a/apps/web/src/actions/freeze-frame-store.ts
+++ /dev/null
@@ -1,72 +0,0 @@
-"use client";
-
-import { create } from "zustand";
-import { persist } from "zustand/middleware";
-
-export const DEFAULT_FREEZE_DURATION_SECONDS = 3;
-export const MAX_FREEZE_DURATION_SECONDS = 600;
-
-export function isValidFreezeDuration({
-	seconds,
-}: {
-	seconds: number;
-}): boolean {
-	return (
-		Number.isFinite(seconds) &&
-		seconds > 0 &&
-		seconds <= MAX_FREEZE_DURATION_SECONDS
-	);
-}
-
-type DurationResolver = ({ seconds }: { seconds: number | null }) => void;
-
-interface FreezeFrameState {
-	isOpen: boolean;
-	lastDurationSeconds: number;
-	resolver: DurationResolver | null;
-	requestDuration: () => Promise<number | null>;
-	confirmDuration: ({ seconds }: { seconds: number }) => void;
-	cancelDuration: () => void;
-}
-
-export const useFreezeFrameStore = create<FreezeFrameState>()(
-	persist(
-		(set, get) => ({
-			isOpen: false,
-			lastDurationSeconds: DEFAULT_FREEZE_DURATION_SECONDS,
-			resolver: null,
-
-			requestDuration: () =>
-				new Promise<number | null>((resolve) => {
-					// A new invocation supersedes any pending one: resolve it as
-					// cancelled so its handler aborts instead of hanging.
-					get().resolver?.({ seconds: null });
-					set({
-						isOpen: true,
-						resolver: ({ seconds }) => resolve(seconds),
-					});
-				}),
-			confirmDuration: ({ seconds }) => {
-				if (!isValidFreezeDuration({ seconds })) {
-					return;
-				}
-				get().resolver?.({ seconds });
-				set({
-					isOpen: false,
-					resolver: null,
-					lastDurationSeconds: seconds,
-				});
-			},
-			cancelDuration: () => {
-				get().resolver?.({ seconds: null });
-				set({ isOpen: false, resolver: null });
-			},
-		}),
-		{
-			name: "freeze-frame-store",
-			partialize: (state) => ({
-				lastDurationSeconds: state.lastDurationSeconds,
-			}),
-		},
-	),
-);