Split software arch desc for easier manintenance. Many fixes related to next video playing and remote playback

src-tauri/src/jellyfin/client.rs

@@ -224,20 +224,20 @@ impl JellyfinClient {
         debug!("[JellyfinClient] play_on_session called: session={}, {} items, start_index={}",
                   session_id, item_ids.len(), start_index);
 
-        // Build URL with query parameters (Jellyfin expects query params, not JSON body!)
+        // Build URL with query parameters (Jellyfin expects PascalCase query params)
         let mut url = format!(
-            "{}/Sessions/{}/Playing?playCommand=PlayNow&startIndex={}",
+            "{}/Sessions/{}/Playing?PlayCommand=PlayNow&StartIndex={}",
             self.config.server_url, session_id, start_index
         );
 
         // Add item IDs as repeated query parameters
         for item_id in &item_ids {
-            url.push_str(&format!("&itemIds={}", item_id));
+            url.push_str(&format!("&ItemIds={}", item_id));
         }
 
         // Add start position if provided
         if let Some(ticks) = start_position_ticks {
-            url.push_str(&format!("&startPositionTicks={}", ticks));
+            url.push_str(&format!("&StartPositionTicks={}", ticks));
             log::info!("[JellyfinClient] Starting at position: {} ticks", ticks);
         }