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, 0 insertions, 5 deletions

diff --git a/apps/web/src/timeline/controllers/drag-drop-controller.ts b/apps/web/src/timeline/controllers/drag-drop-controller.ts
index 6c48428a..a419101f 100644
--- a/apps/web/src/timeline/controllers/drag-drop-controller.ts
+++ b/apps/web/src/timeline/controllers/drag-drop-controller.ts
@@ -15,7 +15,6 @@ import {
 	buildEffectElement,
 } from "@/timeline/element-utils";
 import { AddTrackCommand, InsertElementCommand } from "@/commands/timeline";
-import { effectsRegistry } from "@/effects";
 import { BatchCommand } from "@/commands";
 import type { Command } from "@/commands/base-command";
 import { computeDropTarget } from "@/timeline/components/drop-target";
@@ -471,10 +470,6 @@ export class DragDropController {
 			return;
 		}
 
-		if (effectsRegistry.get(dragData.effectType).supportsStandalone === false) {
-			return;
-		}
-
 		const element = buildEffectElement({
 			effectType: dragData.effectType,
 			startTime: target.xPosition,