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/data/model/BaseItem.kt

@@ -187,6 +187,25 @@ data class BaseItem(
                     )
                 }
 
+                BaseItemKind.TV_CHANNEL -> {
+                    Destination.Playback(
+                        itemId = id,
+                        positionMs = 0L,
+                    )
+                }
+
+                BaseItemKind.PROGRAM -> {
+                    val channelId = data.channelId
+                    if (channelId != null) {
+                        Destination.Playback(
+                            itemId = channelId,
+                            positionMs = 0L,
+                        )
+                    } else {
+                        Destination.MediaItem(this)
+                    }
+                }
+
                 else -> {
                     Destination.MediaItem(this)
                 }

app/src/main/java/com/github/damontecres/wholphin/data/model/HomeRowConfig.kt

@@ -111,7 +111,7 @@ sealed interface HomeRowConfig {
     }
 
     /**
-     *
+     * Currently recording
      */
     @Serializable
     @SerialName("Recordings")
@@ -122,7 +122,7 @@ sealed interface HomeRowConfig {
     }
 
     /**
-     *
+     * Programs on now/recommended
      */
     @Serializable
     @SerialName("TvPrograms")
@@ -132,6 +132,17 @@ sealed interface HomeRowConfig {
         override fun updateViewOptions(viewOptions: HomeRowViewOptions): TvPrograms = this.copy(viewOptions = viewOptions)
     }
 
+    /**
+     * Live TV channels
+     */
+    @Serializable
+    @SerialName("TvChannels")
+    data class TvChannels(
+        override val viewOptions: HomeRowViewOptions = HomeRowViewOptions(),
+    ) : HomeRowConfig {
+        override fun updateViewOptions(viewOptions: HomeRowViewOptions): TvChannels = this.copy(viewOptions = viewOptions)
+    }
+
     /**
      * Fetch suggestions from [com.github.damontecres.wholphin.services.SuggestionService] for the given parent ID
      */
@@ -217,5 +228,11 @@ data class HomeRowViewOptions(
                 heightDp = Cards.HEIGHT_EPISODE,
                 aspectRatio = AspectRatio.WIDE,
             )
+
+        val channelsDefault =
+            HomeRowViewOptions(
+                heightDp = 96,
+                aspectRatio = AspectRatio.WIDE,
+            )
     }
 }