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# Search Sets on live-preview plus — locked

The plus under a block in live preview must open **Statamic's own Search Sets** (Headline, Richtext, Links) over the preview. Same picker as sidebar Add Set.

## Path — do not delete

`add-block-native` → `handleAddBlockNative` → `openSetPickerOverPreview` (Statamic `set-picker` over the plus).

Open the picker in `setTimeout(0)`. The plus click's pointerdown is forwarded onto the overlay body; mounting in the same turn closes Search Sets as clicked-away. `groupedPickerSets` needs a `handle` (empty list without one) — not `all` (grid lists every set twice).

`isPreviewMessageSource` must accept `event.source === overlay` (the plus handler is overlay script bound on the preview document). Rejecting that drops the click.

## Forbidden unless the user asks in THIS message

- Delete or bypass `handleAddBlockNative` / `openSetPickerOverPreview`
- Remove `handle` from `groupedPickerSets` (empty list) or set it to `all` (grid doubles)
- Side-effect edits (icons, grid tab, prefetch, unique-sets) that skip plus → Search Sets

The sidebar picker is the source. Preview plus opens that picker, not a copy.