feat: enhance stream URL handling and add initial offset support in VideoPlayer

k-tv-backend/infra/src/jellyfin.rs

@@ -158,10 +158,14 @@ impl IMediaProvider for JellyfinMediaProvider {
     /// Requests H.264 video + AAC audio in an MP4 container so that all
     /// major browsers can play it natively. Jellyfin will direct-play if the
     /// source already matches; otherwise it transcodes on the fly.
+    /// A high `VideoBitRate` (40 Mbps) preserves quality on local networks.
     /// The API key is embedded in the URL so the player needs no separate auth.
+    ///
+    /// Note: the caller (stream proxy route) may append `StartTimeTicks` to
+    /// seek to the correct broadcast offset before returning the URL to the client.
     async fn get_stream_url(&self, item_id: &MediaItemId) -> DomainResult<String> {
         Ok(format!(
-            "{}/Videos/{}/stream?videoCodec=h264&audioCodec=aac&container=mp4&api_key={}",
+            "{}/Videos/{}/stream?videoCodec=h264&audioCodec=aac&container=mp4&VideoBitRate=40000000&api_key={}",
             self.config.base_url,
             item_id.as_ref(),
             self.config.api_key,