An editor of a Topic, or an admin, now edits images in place. Hovering the
image on a Topic page or a Podcast Episode page shows a camera, and a click
opens Edit topic image or Edit podcast image. A tap does the same on mobile.
The Podcast Episode page's actions menu gains Edit podcast. Its dialog edits
the title, the description, and the image, and it matches the Edit topic form.
A Podcast Episode image render reuses the topic image renders and their shared
regeneration limit. The episode stores its image origin and prompt.
The admin console drops its Home section. A page's rank dialog sets pins.