feat(review): flag handles in the review player (metadata only)

Renders run 8 frames past the cut at each end. Directors were flagging
glitches in unfixed handles as shot problems, so the player now marks
them — without trimming or burning anything into the EXRs/MOV/MP4.

- Version.handleHead/handleTail/pictureStartFrame, Export.handleHead/
  handleTail; migration backfills pipeline exports and their preview
  versions from the manifest's handleFrames (else 8)
- AE panel: "Includes handles [8] frames each end" -> manifest.review;
  older manifests fall back to source.handleFrames
- finalize copies handles onto the Version; worker 1.6.4 reports the
  head slate length (pictureStartSeconds), else the player infers it
  as MP4 frames - EXR frameCount
- Player: hatched HANDLE / SLATE regions and cut marks on the timeline,
  "HEAD/TAIL HANDLE · NOT IN EDIT" overlay on handle frames, HANDLE badge
  on notes, "Edit range only" toggle (default on in the client portal)
- Staff Handles editor on the review page for manual uploads/corrections

Also fixes two player bugs found while testing: timeToFrame floored
float error (every seek landed a frame early), and J/reverse never ran
(the keyboard effect's cleanup stopped it on the next render).

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

components/comments/CommentPanel.tsx

@@ -10,6 +10,7 @@ import { Badge } from "@/components/ui/badge";
 import { cn } from "@/lib/utils";
 import { getInitials, formatRelativeDate } from "@/lib/utils";
 import { frameToTimecode } from "@/lib/frame-utils";
+import { HandleBadge } from "@/components/player/HandleBadge";
 import {
   CheckCircle2,
   Circle,
@@ -151,6 +152,7 @@ export function CommentPanel({
             <span className="text-xs text-muted-foreground">
               {frameToTimecode(activeCommentFrame, fps)}
             </span>
+            <HandleBadge frame={activeCommentFrame} />
           </div>
           <Textarea
             ref={inputRef}
@@ -348,6 +350,7 @@ function CommentThread({
               >
                 F{String(comment.frameNumber).padStart(4, "0")}
               </button>
+              <HandleBadge frame={comment.frameNumber} />
               <span className="text-xs text-muted-foreground ml-auto">
                 {formatRelativeDate(comment.createdAt)}
               </span>

components/player/FrameTimeline.tsx

@@ -16,7 +16,7 @@ interface FrameTimelineProps {
 export function FrameTimeline({ fps, comments, annotations = [], videoRef, onSeek }: FrameTimelineProps) {
   const canvasRef = useRef<HTMLCanvasElement>(null);
   const isDragging = useRef(false);
-  const { currentFrame, totalFrames } = useReviewStore();
+  const { currentFrame, totalFrames, editRange } = useReviewStore();
 
   const draw = useCallback(() => {
     const canvas = canvasRef.current;
@@ -32,6 +32,42 @@ export function FrameTimeline({ fps, comments, annotations = [], videoRef, onSee
     ctx.fillStyle = "hsl(0 0% 6%)";
     ctx.fillRect(0, 0, W, H);
 
+    // Slate and handles — under the ruler so ticks still read across them
+    const regions: { from: number; to: number; kind: "slate" | "handle" }[] = [];
+    if (editRange && totalFrames > 0) {
+      const { pictureStart, cutIn, tailStart, pictureEnd } = editRange;
+      if (pictureStart > 0) regions.push({ from: 0, to: pictureStart, kind: "slate" });
+      if (cutIn > pictureStart) regions.push({ from: pictureStart, to: cutIn, kind: "handle" });
+      if (pictureEnd > tailStart) regions.push({ from: tailStart, to: pictureEnd, kind: "handle" });
+    }
+    const xOf = (f: number) => Math.round((f / totalFrames) * W);
+    for (const r of regions) {
+      const x0 = xOf(r.from);
+      const x1 = xOf(r.to);
+      if (x1 <= x0) continue;
+      if (r.kind === "slate") {
+        ctx.fillStyle = "hsl(0 0% 2%)";
+        ctx.fillRect(x0, 0, x1 - x0, H);
+        continue;
+      }
+      ctx.fillStyle = "hsl(38 92% 50% / 0.14)";
+      ctx.fillRect(x0, 0, x1 - x0, H);
+      // Diagonal hatching, clipped to the region
+      ctx.save();
+      ctx.beginPath();
+      ctx.rect(x0, 0, x1 - x0, H);
+      ctx.clip();
+      ctx.strokeStyle = "hsl(38 92% 50% / 0.28)";
+      ctx.lineWidth = 1;
+      for (let x = x0 - H; x < x1; x += 7) {
+        ctx.beginPath();
+        ctx.moveTo(x, H);
+        ctx.lineTo(x + H, 0);
+        ctx.stroke();
+      }
+      ctx.restore();
+    }
+
     // Frame ruler ticks
     if (totalFrames > 0) {
       const tickInterval = Math.max(1, Math.floor(totalFrames / (W / 40)));
@@ -59,6 +95,31 @@ export function FrameTimeline({ fps, comments, annotations = [], videoRef, onSee
       }
     }
 
+    // Region labels and cut points, over the ruler
+    for (const r of regions) {
+      const x0 = xOf(r.from);
+      const x1 = xOf(r.to);
+      const label = r.kind === "slate" ? "SLATE" : "HANDLE";
+      ctx.font = "bold 9px monospace";
+      if (x1 - x0 >= ctx.measureText(label).width + 8) {
+        ctx.fillStyle = r.kind === "slate" ? "hsl(0 0% 45%)" : "hsl(38 92% 60%)";
+        ctx.textAlign = "center";
+        ctx.fillText(label, (x0 + x1) / 2, H / 2 + 8);
+      }
+    }
+    if (editRange && totalFrames > 0) {
+      ctx.strokeStyle = "hsl(38 92% 55%)";
+      ctx.lineWidth = 1;
+      for (const f of [editRange.cutIn, editRange.tailStart]) {
+        if (f <= editRange.pictureStart || f >= editRange.pictureEnd) continue;
+        const x = xOf(f) + 0.5;
+        ctx.beginPath();
+        ctx.moveTo(x, 0);
+        ctx.lineTo(x, H);
+        ctx.stroke();
+      }
+    }
+
     // Annotation markers — amber diamonds at top
     const seenAnnotationFrames = new Set<number>();
     annotations.forEach((ann) => {
@@ -121,7 +182,7 @@ export function FrameTimeline({ fps, comments, annotations = [], videoRef, onSee
       ctx.closePath();
       ctx.fill();
     }
-  }, [currentFrame, totalFrames, comments, annotations]);
+  }, [currentFrame, totalFrames, comments, annotations, editRange]);
 
   // Resize observer to match canvas to container
   useEffect(() => {

components/player/HandleBadge.tsx

@@ -0,0 +1,25 @@
+"use client";
+
+import { useReviewStore } from "@/hooks/use-review-player";
+import { isHandleFrame } from "@/lib/handles";
+import { cn } from "@/lib/utils";
+
+/**
+ * "HANDLE" tag for a note left on a handle frame, so whoever picks it up can
+ * see at a glance that it's about a frame outside the edit.
+ */
+export function HandleBadge({ frame, className }: { frame: number; className?: string }) {
+  const editRange = useReviewStore((s) => s.editRange);
+  if (!isHandleFrame(editRange, frame)) return null;
+  return (
+    <span
+      className={cn(
+        "rounded border border-amber-400/40 bg-amber-400/10 px-1 py-px font-mono text-[9px] font-bold tracking-wide text-amber-400",
+        className
+      )}
+      title="This frame is a handle — outside the edit"
+    >
+      HANDLE
+    </span>
+  );
+}

components/player/HandleOverlay.tsx

@@ -0,0 +1,26 @@
+"use client";
+
+import type { FrameRegion } from "@/lib/handles";
+
+/**
+ * Flags a handle frame on the picture: an amber frame round the player and a
+ * "HANDLE · NOT IN EDIT" tag. Shown only while the playhead is in a handle so
+ * a reviewer can't mistake a glitch there for a problem in the cut.
+ *
+ * Purely a viewing aid over the player — it never reaches the media, passes
+ * every pointer event through, and sits outside the zoom layer so it stays
+ * readable at any zoom.
+ */
+export function HandleOverlay({ region }: { region: FrameRegion }) {
+  if (region !== "head" && region !== "tail") return null;
+  return (
+    <div
+      className="pointer-events-none absolute inset-0 ring-4 ring-inset ring-amber-400/80"
+      data-testid="handle-overlay"
+    >
+      <div className="absolute left-1/2 top-3 -translate-x-1/2 whitespace-nowrap rounded bg-amber-400 px-2.5 py-1 font-mono text-[11px] font-bold tracking-wide text-black shadow">
+        {region === "head" ? "HEAD" : "TAIL"} HANDLE · NOT IN EDIT
+      </div>
+    </div>
+  );
+}

components/player/PlaybackControls.tsx

@@ -14,6 +14,7 @@ import {
   Eye,
   EyeOff,
   RectangleHorizontal,
+  Scissors,
 } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import {
@@ -74,8 +75,20 @@ export function PlaybackControls({
     setShowAnnotations,
     setAspectPresetId,
     setBlankingMode,
+    editRange,
+    editRangeOnly,
+    setEditRangeOnly,
   } = useReviewStore();
 
+  // Keeping to the edit, the ends of the transport are the cut points.
+  const keepToEdit = editRangeOnly && !!editRange;
+  const goToFrame = (frame: number) => {
+    const video = videoRef.current;
+    if (!video) return;
+    video.pause();
+    video.currentTime = frame / fps;
+  };
+
   const handleRateChange = (val: string) => {
     const rate = parseFloat(val);
     if (videoRef.current) videoRef.current.playbackRate = rate;
@@ -115,13 +128,14 @@ export function PlaybackControls({
                 size="icon-sm"
                 className="text-zinc-400 hover:text-white"
                 onClick={() => {
-                  if (videoRef.current) videoRef.current.currentTime = 0;
+                  if (keepToEdit && editRange) goToFrame(editRange.cutIn);
+                  else if (videoRef.current) videoRef.current.currentTime = 0;
                 }}
               >
                 <ChevronFirst className="h-4 w-4" />
               </Button>
             </TooltipTrigger>
-            <TooltipContent>Go to start</TooltipContent>
+            <TooltipContent>{keepToEdit ? "Go to cut in" : "Go to start"}</TooltipContent>
           </Tooltip>
 
           <Tooltip>
@@ -198,14 +212,15 @@ export function PlaybackControls({
                 size="icon-sm"
                 className="text-zinc-400 hover:text-white"
                 onClick={() => {
-                  if (videoRef.current)
+                  if (keepToEdit && editRange) goToFrame(editRange.tailStart - 1);
+                  else if (videoRef.current)
                     videoRef.current.currentTime = videoRef.current.duration;
                 }}
               >
                 <ChevronLast className="h-4 w-4" />
               </Button>
             </TooltipTrigger>
-            <TooltipContent>Go to end</TooltipContent>
+            <TooltipContent>{keepToEdit ? "Go to cut out" : "Go to end"}</TooltipContent>
           </Tooltip>
         </div>
       </div>
@@ -282,6 +297,32 @@ export function PlaybackControls({
           )}
         </div>
 
+        {/* Edit range only — only for versions with handles marked */}
+        {editRange && (
+          <Tooltip>
+            <TooltipTrigger asChild>
+              <Button
+                variant="ghost"
+                size="icon-sm"
+                className={cn(
+                  "text-zinc-400 hover:text-white",
+                  editRangeOnly && "text-amber-400 bg-amber-400/10"
+                )}
+                onClick={() => setEditRangeOnly(!editRangeOnly)}
+                aria-pressed={editRangeOnly}
+                aria-label="Edit range only"
+              >
+                <Scissors className="h-4 w-4" />
+              </Button>
+            </TooltipTrigger>
+            <TooltipContent>
+              {editRangeOnly
+                ? "Playing the edit only — click to include handles"
+                : "Play the edit only (skip handles)"}
+            </TooltipContent>
+          </Tooltip>
+        )}
+
         {/* Annotation toggle */}
         <Tooltip>
           <TooltipTrigger asChild>

components/player/ReviewPlayer.tsx

@@ -15,10 +15,12 @@ import { AnnotationTools } from "@/components/annotations/AnnotationTools";
 import { AspectOverlay } from "./AspectOverlay";
 import { FrameTimeline } from "./FrameTimeline";
 import { PlaybackControls } from "./PlaybackControls";
+import { HandleOverlay } from "./HandleOverlay";
 import { useZoomPan } from "@/hooks/use-zoom-pan";
 import { Minus, Plus } from "lucide-react";
 import { timeToFrame, frameToTime, durationToFrameCount } from "@/lib/frame-utils";
 import { cn } from "@/lib/utils";
+import { computeEditRange, frameRegion, type VersionHandles } from "@/lib/handles";
 import type { CommentWithReplies } from "@/types";
 
 export interface ReviewPlayerRef {
@@ -40,6 +42,10 @@ interface ReviewPlayerProps {
   saveAnnotationFn?: (data: { versionId: string; frameNumber: number; drawingData: unknown; color: string }) => Promise<void>;
   /** Override the default server action used to create the companion comment */
   addCommentFn?: (data: { versionId: string; frameNumber: number; timestamp: number; text: string }) => Promise<void>;
+  /** The version's handle metadata — frames past the cut get flagged. */
+  handles?: VersionHandles | null;
+  /** Start with playback kept to the edit (the client portal's default). */
+  defaultEditRangeOnly?: boolean;
 }
 
 export const ReviewPlayer = forwardRef<ReviewPlayerRef, ReviewPlayerProps>(
@@ -55,6 +61,8 @@ export const ReviewPlayer = forwardRef<ReviewPlayerRef, ReviewPlayerProps>(
       onAnnotationSaved,
       saveAnnotationFn,
       addCommentFn,
+      handles,
+      defaultEditRangeOnly = false,
     },
     ref
   ) {
@@ -66,6 +74,7 @@ export const ReviewPlayer = forwardRef<ReviewPlayerRef, ReviewPlayerProps>(
     const stageRef = useRef<HTMLDivElement>(null);
     const zoomLayerRef = useRef<HTMLDivElement>(null);
     const reverseIntervalRef = useRef<ReturnType<typeof setInterval> | null>(null);
+    const openedAtCut = useRef(false);
     const [isReversing, setIsReversing] = useState(false);
 
     const {
@@ -81,8 +90,38 @@ export const ReviewPlayer = forwardRef<ReviewPlayerRef, ReviewPlayerProps>(
       setDuration,
       setFps,
       setTotalFrames,
+      totalFrames,
+      editRange,
+      editRangeOnly,
+      setEditRange,
+      setEditRangeOnly,
     } = useReviewStore();
 
+    // ── Handles ──────────────────────────────────────────────────────────────
+    // Where the cut sits in this media. Recomputed from primitives so a parent
+    // re-render with a fresh `handles` object does not churn the store.
+    const handleHead = handles?.handleHead ?? null;
+    const handleTail = handles?.handleTail ?? null;
+    const pictureStartFrame = handles?.pictureStartFrame ?? null;
+    const handleFrameCount = handles?.frameCount ?? null;
+    useEffect(() => {
+      setEditRange(
+        computeEditRange(
+          { handleHead, handleTail, pictureStartFrame, frameCount: handleFrameCount },
+          totalFrames
+        )
+      );
+    }, [handleHead, handleTail, pictureStartFrame, handleFrameCount, totalFrames, setEditRange]);
+    useEffect(() => () => setEditRange(null), [setEditRange]);
+
+    useEffect(() => {
+      setEditRangeOnly(defaultEditRangeOnly);
+    }, [defaultEditRangeOnly, setEditRangeOnly]);
+
+    // Read inside event handlers / intervals without re-binding them.
+    const keepToEdit = useRef<{ range: typeof editRange; on: boolean }>({ range: null, on: false });
+    keepToEdit.current = { range: editRange, on: editRangeOnly && !!editRange };
+
     const zoom = useZoomPan(stageRef, zoomLayerRef, {
       gesturesEnabled: !isAnnotating,
     });
@@ -102,6 +141,7 @@ export const ReviewPlayer = forwardRef<ReviewPlayerRef, ReviewPlayerProps>(
       setDuration(0);
       setTotalFrames(0);
       resetZoom();
+      openedAtCut.current = false;
     }, [videoUrl, setCurrentFrame, setCurrentTime, setDuration, setTotalFrames, resetZoom]);
 
     // ── Playback state sync ──────────────────────────────────────────────────
@@ -121,6 +161,57 @@ export const ReviewPlayer = forwardRef<ReviewPlayerRef, ReviewPlayerProps>(
       setTotalFrames(frames);
     }, [fps, setDuration, setTotalFrames]);
 
+    /**
+     * Play — when keeping to the edit, from the cut in-point if the playhead
+     * is outside the cut (slate, a handle, or parked on the last cut frame).
+     */
+    const startPlayback = useCallback(() => {
+      const video = videoRef.current;
+      if (!video) return;
+      const { range, on } = keepToEdit.current;
+      if (on && range) {
+        const frame = timeToFrame(video.currentTime, fps);
+        if (frame < range.cutIn || frame >= range.tailStart - 1) {
+          video.currentTime = frameToTime(range.cutIn, fps);
+        }
+      }
+      // A pause() or power-saving pause before playback starts rejects this;
+      // that's expected, not an error.
+      video.play().catch(() => {});
+    }, [fps]);
+
+    // Keeping to the edit: stop on the last frame of the cut rather than
+    // playing into the tail handle. Checked every animation frame — the
+    // video's own timeupdate only fires ~4x a second.
+    useEffect(() => {
+      if (!isPlaying || !editRangeOnly || !editRange) return;
+      const lastCutFrame = editRange.tailStart - 1;
+      let raf = 0;
+      const tick = () => {
+        const video = videoRef.current;
+        if (!video || video.paused) return;
+        if (timeToFrame(video.currentTime, fps) >= editRange.tailStart) {
+          video.pause();
+          video.currentTime = frameToTime(lastCutFrame, fps);
+          return;
+        }
+        raf = requestAnimationFrame(tick);
+      };
+      raf = requestAnimationFrame(tick);
+      return () => cancelAnimationFrame(raf);
+    }, [isPlaying, editRangeOnly, editRange, fps]);
+
+    // Keeping to the edit: open on the first frame of the cut rather than on
+    // the slate. Once per video, so it never moves the playhead afterwards.
+    useEffect(() => {
+      const video = videoRef.current;
+      if (!video || openedAtCut.current || !editRangeOnly || !editRange) return;
+      openedAtCut.current = true;
+      if (video.paused && timeToFrame(video.currentTime, fps) < editRange.cutIn) {
+        video.currentTime = frameToTime(editRange.cutIn, fps);
+      }
+    }, [editRange, editRangeOnly, fps]);
+
     const handlePlay = useCallback(() => setPlaying(true), [setPlaying]);
     const handlePause = useCallback(() => setPlaying(false), [setPlaying]);
 
@@ -132,7 +223,7 @@ export const ReviewPlayer = forwardRef<ReviewPlayerRef, ReviewPlayerProps>(
         video.currentTime = frameToTime(frame, fps);
         if (!video.paused) video.pause();
       },
-      play: () => videoRef.current?.play(),
+      play: () => startPlayback(),
       pause: () => videoRef.current?.pause(),
     }));
 
@@ -163,11 +254,14 @@ export const ReviewPlayer = forwardRef<ReviewPlayerRef, ReviewPlayerProps>(
       video.pause();
       setIsReversing(true);
       reverseIntervalRef.current = setInterval(() => {
-        if (!videoRef.current || videoRef.current.currentTime <= 0) {
+        // Keeping to the edit, reverse stops at the cut in-point.
+        const { range, on } = keepToEdit.current;
+        const floor = on && range ? frameToTime(range.cutIn, fps) : 0;
+        if (!videoRef.current || videoRef.current.currentTime <= floor) {
           stopReverse();
           return;
         }
-        videoRef.current.currentTime = Math.max(0, videoRef.current.currentTime - 1 / fps);
+        videoRef.current.currentTime = Math.max(floor, videoRef.current.currentTime - 1 / fps);
       }, 1000 / fps);
     }, [fps, stopReverse]);
 
@@ -176,11 +270,11 @@ export const ReviewPlayer = forwardRef<ReviewPlayerRef, ReviewPlayerProps>(
       if (!video) return;
       stopReverse();
       if (video.paused) {
-        video.play();
+        startPlayback();
       } else {
         video.pause();
       }
-    }, [stopReverse]);
+    }, [stopReverse, startPlayback]);
 
     // ── Keyboard shortcuts (JKL + arrows + space + F) ───────────────────────
     useEffect(() => {
@@ -213,7 +307,7 @@ export const ReviewPlayer = forwardRef<ReviewPlayerRef, ReviewPlayerProps>(
           case "l":
             e.preventDefault();
             stopReverse();
-            if (videoRef.current?.paused) videoRef.current.play();
+            if (videoRef.current?.paused) startPlayback();
             break;
           case "arrowleft":
             e.preventDefault();
@@ -250,11 +344,13 @@ export const ReviewPlayer = forwardRef<ReviewPlayerRef, ReviewPlayerProps>(
       };
 
       window.addEventListener("keydown", handleKeyDown);
-      return () => {
-        window.removeEventListener("keydown", handleKeyDown);
-        stopReverse();
-      };
-    }, [isReversing, stepFrame, startReverse, stopReverse, togglePlayback, zoomBy, resetZoom]);
+      return () => window.removeEventListener("keydown", handleKeyDown);
+    }, [isReversing, stepFrame, startReverse, stopReverse, togglePlayback, startPlayback, zoomBy, resetZoom]);
+
+    // Stop a running reverse only on unmount. This used to live in the
+    // cleanup above, which re-runs whenever isReversing changes — so starting
+    // reverse immediately stopped it, and J never did anything.
+    useEffect(() => stopReverse, [stopReverse]);
 
     // ── Fullscreen ───────────────────────────────────────────────────────────
     const toggleFullscreen = () => {
@@ -350,6 +446,9 @@ export const ReviewPlayer = forwardRef<ReviewPlayerRef, ReviewPlayerProps>(
           />
           </div>
 
+          {/* Handle flag — drawn over the player, never into the media */}
+          <HandleOverlay region={frameRegion(editRange, currentFrame)} />
+
           {/* Zoom badge — only while zoomed */}
           {zoom.zoomed && (
             <div

components/versions/VersionHandlesButton.tsx

@@ -0,0 +1,178 @@
+"use client";
+
+import { useState } from "react";
+import { Scissors } from "lucide-react";
+import { Button } from "@/components/ui/button";
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from "@/components/ui/dialog";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import { useToast } from "@/components/ui/use-toast";
+import { updateVersionHandles } from "@/actions/versions";
+import { cn } from "@/lib/utils";
+
+interface VersionHandlesButtonProps {
+  versionId: string;
+  handleHead: number | null;
+  handleTail: number | null;
+  pictureStartFrame: number | null;
+  onSaved?: () => void;
+}
+
+const DEFAULT_HANDLES = 8;
+
+function toInt(value: string): number | null {
+  if (value.trim() === "") return null;
+  const n = Number(value);
+  return Number.isInteger(n) && n >= 0 ? n : NaN;
+}
+
+/**
+ * Top-bar control showing a version's handles, and a dialog to set them —
+ * for manual uploads, or to correct a render. Review metadata only.
+ */
+export function VersionHandlesButton({
+  versionId,
+  handleHead,
+  handleTail,
+  pictureStartFrame,
+  onSaved,
+}: VersionHandlesButtonProps) {
+  const marked = (handleHead ?? 0) > 0 || (handleTail ?? 0) > 0;
+  const [open, setOpen] = useState(false);
+  const [includes, setIncludes] = useState(marked);
+  const [head, setHead] = useState(String(handleHead ?? DEFAULT_HANDLES));
+  const [tail, setTail] = useState(String(handleTail ?? DEFAULT_HANDLES));
+  const [slate, setSlate] = useState(pictureStartFrame == null ? "" : String(pictureStartFrame));
+  const [saving, setSaving] = useState(false);
+  const { toast } = useToast();
+
+  const openDialog = () => {
+    setIncludes(marked);
+    setHead(String(handleHead ?? DEFAULT_HANDLES));
+    setTail(String(handleTail ?? DEFAULT_HANDLES));
+    setSlate(pictureStartFrame == null ? "" : String(pictureStartFrame));
+    setOpen(true);
+  };
+
+  const headN = toInt(head);
+  const tailN = toInt(tail);
+  const slateN = toInt(slate);
+  const invalid =
+    (includes && (headN == null || Number.isNaN(headN) || tailN == null || Number.isNaN(tailN))) ||
+    Number.isNaN(slateN);
+
+  const save = async () => {
+    if (invalid) return;
+    setSaving(true);
+    try {
+      await updateVersionHandles({
+        versionId,
+        handleHead: includes ? headN! : 0,
+        handleTail: includes ? tailN! : 0,
+        pictureStartFrame: slateN,
+      });
+      setOpen(false);
+      onSaved?.();
+    } catch {
+      toast({ title: "Couldn't save handles", variant: "destructive" });
+    } finally {
+      setSaving(false);
+    }
+  };
+
+  const label = marked
+    ? handleHead === handleTail
+      ? `Handles ${handleHead}`
+      : `Handles ${handleHead ?? 0}/${handleTail ?? 0}`
+    : "No handles";
+
+  return (
+    <>
+      <Button
+        variant="ghost"
+        size="sm"
+        className={cn("h-7 gap-1 text-xs", marked ? "text-amber-400" : "text-muted-foreground")}
+        onClick={openDialog}
+        title="Frames past the cut that aren't in the edit"
+      >
+        <Scissors className="h-3 w-3" />
+        <span className="hidden sm:inline">{label}</span>
+      </Button>
+
+      <Dialog open={open} onOpenChange={setOpen}>
+        <DialogContent className="sm:max-w-sm">
+          <DialogHeader>
+            <DialogTitle>Handles</DialogTitle>
+            <DialogDescription>
+              Frames rendered past the cut at each end. The player marks them “Handle · Not in
+              edit” so reviewers don&apos;t flag them. Nothing is burned in.
+            </DialogDescription>
+          </DialogHeader>
+
+          <label className="flex items-center gap-2 text-sm">
+            <input
+              type="checkbox"
+              checked={includes}
+              onChange={(e) => setIncludes(e.target.checked)}
+              className="h-4 w-4 accent-amber-500"
+            />
+            This version includes handles
+          </label>
+
+          <div className="grid grid-cols-2 gap-3">
+            <div className="space-y-1">
+              <Label htmlFor="handle-head" className="text-xs">Head (frames)</Label>
+              <Input
+                id="handle-head"
+                inputMode="numeric"
+                value={head}
+                disabled={!includes}
+                onChange={(e) => setHead(e.target.value)}
+              />
+            </div>
+            <div className="space-y-1">
+              <Label htmlFor="handle-tail" className="text-xs">Tail (frames)</Label>
+              <Input
+                id="handle-tail"
+                inputMode="numeric"
+                value={tail}
+                disabled={!includes}
+                onChange={(e) => setTail(e.target.value)}
+              />
+            </div>
+          </div>
+
+          <div className="space-y-1">
+            <Label htmlFor="handle-slate" className="text-xs">Slate frames before the picture</Label>
+            <Input
+              id="handle-slate"
+              inputMode="numeric"
+              placeholder="Auto"
+              value={slate}
+              onChange={(e) => setSlate(e.target.value)}
+            />
+            <p className="text-[11px] text-muted-foreground">
+              Leave blank to detect it (pipeline previews have a 1-frame slate).
+            </p>
+          </div>
+
+          <DialogFooter>
+            <Button variant="ghost" onClick={() => setOpen(false)}>
+              Cancel
+            </Button>
+            <Button onClick={save} disabled={saving || invalid}>
+              {saving ? "Saving…" : "Save"}
+            </Button>
+          </DialogFooter>
+        </DialogContent>
+      </Dialog>
+    </>
+  );
+}