feat(studio): always-on crop with reposition handle, drop crop mode (#2090)

Crop is now part of the element selection instead of a separate mode. Selecting
a croppable element shows edge handles just outside each side and, once cropped,
the full content with the cropped-away area dimmed plus a center reposition
handle to pan the crop window. Dragging the body moves the element, edge handles
crop, the center handle pans; corners stay free for the resize handle. Removes
the crop-mode toggle (toolbar + property-panel buttons), the cropMode/
cropAvailable player-store state, and the double-click-to-crop gesture. The
clip-path inset model is unchanged.

packages/studio/src/components/StudioRightPanel.tsx

@@ -51,8 +51,6 @@ export interface StudioRightPanelProps {
   recordingState?: "idle" | "recording" | "preview";
   recordingDuration?: number;
   onToggleRecording?: () => void;
-  cropMode?: boolean;
-  onCropModeChange?: (active: boolean) => void;
   /** Dependencies for the Slideshow persist callback, threaded from App.tsx. */
   sdkSession: Composition | null;
   reloadPreview: () => void;
@@ -73,8 +71,6 @@ export function StudioRightPanel({
   recordingState,
   recordingDuration,
   onToggleRecording,
-  cropMode,
-  onCropModeChange,
   sdkSession,
   reloadPreview,
   domEditSaveTimestampRef,
@@ -400,8 +396,6 @@ export function StudioRightPanel({
       recordingState={recordingState}
       recordingDuration={recordingDuration}
       onToggleRecording={onToggleRecording}
-      cropMode={cropMode}
-      onCropModeChange={onCropModeChange}
     />
   );