peer count fix

crates/lanspread-tauri-deno-ts/src-tauri/src/lib.rs

@@ -464,8 +464,26 @@ async fn update_game_db(games: Vec<Game>, app: AppHandle) {
 
     let state = app.state::<LanSpreadState>();
 
-    // Store games list
-    *state.games.write().await = GameDB::from(games);
+    {
+        let mut game_db = state.games.write().await;
+
+        // Reset peer counts up front. Presence/metadata stay anchored to the baked game.db.
+        for game in game_db.games.values_mut() {
+            game.peer_count = 0;
+        }
+
+        for peer_game in games {
+            if let Some(existing) = game_db.get_mut_game_by_id(&peer_game.id) {
+                existing.peer_count = peer_game.peer_count;
+            } else {
+                log::debug!(
+                    "Peer advertised unknown game {id}; ignoring because game.db is ground truth",
+                    id = peer_game.id
+                );
+            }
+        }
+    }
+
     refresh_games_list(&app).await;
 }