v0.4.5

Added

• ui/preview/track records where the preview iframe navigates (the preview-target session value). preview-edit.js calls it from its postMessage handler, so browsing the real site keeps the edit target current.
• edit/draft-flag.latte, which tells preview-edit.js whether the open page has an unsaved draft.

Changed

• When the preview navigates to another page, the edit panel follows it. With an unsaved draft it shows the overlay instead.
• A bare edit/ opens the session's preview target.
• The page picker's item merges into its parent, and add-child moves to the toolbar.

Removed

• The Umami and Postgres test services from compose.yaml.