The ad plane at api.hanzo.ai/v1/ad had no screen of its own. This adds one
beside the Go module, built the same way as Hanzo Social: campaigns with their
totals, a campaign to launch, pause, edit or delete, ad accounts connected
through /v1/integration, and spend against budget. It shows only what the API
returns, so there is no targeting, creative or delivery data to draw.
Co-authored-by: Hanzo Dev <[email protected]>
