GTAGPT v6 Asset Editor

Open index.html or gtagpt_v6_asset_editor.html.

New:
- Reads asset_manifest.json.
- Loads real PNG categories and thumbnails.
- Paints actual PNGs onto layers.
- Layers: ground, roads, buildings, props, overlays, vehicles.
- Exports/imports v6 board JSON.
- Play mode drives on the edited PNG board.
- Buildings/props/solid-looking assets block movement.
- Vehicles layer creates parked cars.
- 2 fingers = pan board.
