Search and clearer listening status

There are enough SUMMaries now that browsing alone isn’t always the fastest way to find one. I can search by show, episode, or the summary itself, and the cards make it much clearer whether I haven’t started, am partway through, or already finished listening.

Changelog

• SUMMary cards now distinguish untouched, partially listened, and finished audio with clearer Ready, Listening, and Finished status pills.
• Finished SUMMaries now use a calm green status and progress treatment, making completed listening easier to scan.
• Added search to SUMMaries so you can find episodes by podcast, episode title, or summary text.
• SUMMaries search works separately in Unread and Archived, keeping results focused on the view you are using.
• Subscription SUMMaries links now open the SUMMaries page already filtered to that podcast.