Fix: VLC doesn't restart playback from the beginning as expected (#2050)

## Description

When resetting the watch state or choosing to start from the beginning,
the "from_start" flag isn't passed to VLC. Because of that, VLC doesn't
restart playback from the beginning as expected.

This change adds the flag when needed so VLC starts from the correct
position.

## AI or LLM usage

я использовал Codex

Co-authored-by: osipovgleb <19697793+osipovgleb@users.noreply.github.com>

app/src/main/java/com/github/damontecres/wholphin/ui/playback/PlayExternalPage.kt

@@ -243,6 +243,8 @@ class PlayExternalViewModel
                             }
 
                             // VLC
+                            // A zero position alone does not override VLC's saved resume position.
+                            putExtra("from_start", positionMs == 0L)
                             if (subtitleUrls.isNotEmpty()) {
                                 putExtra("subtitles_location", subtitleUrls.first().toString())
                             }