Improved home page support for Live TV & Recordings (#890)

## Description
Improves home page customization for Live TV & Recordings
- Add row for live tv channels
- Add row for "on now" programs
- Clicking on a TV channel or TV program starts playback
- Better name for "Recently recorded" instead of "Recently added in
Recordings"

Also fixes a back stack issue after adding rows

### Related issues
Follow up from #803 

### Testing
Emulator

## Screenshots
<img width="663" height="190" alt="image"
src="https://github.com/user-attachments/assets/49d41953-42ab-4621-92f1-b7936aab7e97"
/>

## AI or LLM usage
None

app/src/main/java/com/github/damontecres/wholphin/preferences/AppPreference.kt

@@ -660,6 +660,7 @@ sealed interface AppPreference<Pref, T> {
             AppDestinationPreference<AppPreferences>(
                 title = R.string.customize_home,
                 destination = Destination.HomeSettings,
+                summary = R.string.customize_home_summary,
             )
 
         val SendCrashReports =