Episode Search: search box closes when clicking on an empty space

### Description

When you search for something like "AI" which provides no episode results, clicking on the grey area where the episodes would normally be showed causes the search box to close.

Also, if we could get results for things like AI to show up, that would be quite nice :)

### Step-by-step reproduction instructions

1. Go to Discover
2. Search for "AI"
3. Click on the area at the bottom where you would normally see episode results

### Screenshots or screen recording

https://user-images.githubusercontent.com/16253818/229510211-ce13d9ff-3dd5-44a7-a810-82bec58f7586.mp4

### Did you search for existing bug reports?

- [X] I have searched for existing bug reports.

### Device, Operating system, and Pocket Casts app version

Samsung S21 FE, Android 13, Pocket Casts v7.35rc-2

Start from the Discover screen and reproduce the empty-result search flow with “AI” on the stated Android version and app release. Verify that clicking the grey episode-results area does not close the search box; the separate request for AI results should be clarified before treating it as part of the fix.

Written by the indexing model from the issue text.