feat: lens effects tab, standalone motion effects, clip/asset rename, preview popout

- New Lens category in the assets panel: Blur, Motion Blur, Zoom In/Out,
  Pan x4, Shake, Pulse, Spin, Custom Zoom. EffectDefinition gains a
  category field; tabs with an empty category are hidden, and the
  properties-panel 'Open effects' button opens the first non-empty one.
- Motion effects work standalone: dropping them on the timeline creates
  an effect-track element that animates (scale/translate/rotate) every
  track below it, computed purely in the TS frame descriptor - no wasm
  changes, identical in preview and export. supportsStandalone removed.
- Motion Blur: directional gaussian smear (amount + angle) reusing the
  existing WGSL shader with arbitrary u_direction.
- Custom Zoom: start/end scale params (keyframable clip-level).
- MotionOffset gains optional rotate, accumulated clip-level and applied
  to standalone layer quads via rotationDegrees.
- Rename clips (timeline context menu) and media assets (media panel
  context menu) via a shared RenameDialog; asset rename persists through
  storageService with rollback on error.
- Preview pops out into a Document Picture-in-Picture window and docks
  back; button hidden where the API is unsupported.
- Export keeps running when the export popover is closed; only the
  explicit Cancel button aborts.
- Captions and Adjustment tabs removed from the assets panel.

1 files changed, 88 insertions, 0 deletions

diff --git a/apps/web/src/components/editor/rename-dialog.tsx b/apps/web/src/components/editor/rename-dialog.tsx
new file mode 100644
index 00000000..ad9833c0
--- /dev/null
+++ b/apps/web/src/components/editor/rename-dialog.tsx
@@ -0,0 +1,88 @@
+import { Button } from "@/components/ui/button";
+import {
+	Dialog,
+	DialogBody,
+	DialogContent,
+	DialogFooter,
+	DialogHeader,
+	DialogTitle,
+} from "@/components/ui/dialog";
+import { Input } from "@/components/ui/input";
+import { useState } from "react";
+import { Label } from "@/components/ui/label";
+
+export function RenameDialog({
+	isOpen,
+	onOpenChange,
+	onConfirm,
+	currentName,
+	title,
+}: {
+	isOpen: boolean;
+	onOpenChange: (open: boolean) => void;
+	onConfirm: (newName: string) => void;
+	currentName: string;
+	title: string;
+}) {
+	const [name, setName] = useState(currentName);
+
+	const handleOpenChange = (open: boolean) => {
+		if (open) {
+			setName(currentName);
+		}
+		onOpenChange(open);
+	};
+
+	const trimmedName = name.trim();
+	const isConfirmDisabled =
+		trimmedName.length === 0 || trimmedName === currentName;
+
+	const handleConfirm = () => {
+		if (isConfirmDisabled) {
+			return;
+		}
+		onConfirm(trimmedName);
+	};
+
+	return (
+		<Dialog open={isOpen} onOpenChange={handleOpenChange}>
+			<DialogContent>
+				<DialogHeader>
+					<DialogTitle>{title}</DialogTitle>
+				</DialogHeader>
+
+				<DialogBody className="gap-3">
+					<Label>New name</Label>
+					<Input
+						value={name}
+						onChange={(e) => setName(e.target.value)}
+						onKeyDown={(e) => {
+							if (e.key === "Enter") {
+								e.preventDefault();
+								handleConfirm();
+							}
+						}}
+						onFocus={(e) => e.target.select()}
+						placeholder="Enter a new name"
+					/>
+				</DialogBody>
+
+				<DialogFooter>
+					<Button
+						variant="outline"
+						onClick={(e) => {
+							e.preventDefault();
+							e.stopPropagation();
+							onOpenChange(false);
+						}}
+					>
+						Cancel
+					</Button>
+					<Button disabled={isConfirmDisabled} onClick={handleConfirm}>
+						Rename
+					</Button>
+				</DialogFooter>
+			</DialogContent>
+		</Dialog>
+	);
+}