web: fix auth session races, ws token drift, and unread clear behavior

web/src/hooks/useRealtime.ts

@@ -160,7 +160,7 @@ export function useRealtime() {
             window.dispatchEvent(new CustomEvent("bm:chat-updated", { detail: { chatId } }));
             scheduleReloadChats();
             if (chatStore.activeChatId === chatId || (chatStore.messagesByChat[chatId]?.length ?? 0) > 0) {
-              void chatStore.loadMessages(chatId);
+              void chatStore.loadMessages(chatId, { markRead: false });
             }
           }
         }
@@ -398,7 +398,7 @@ export function useRealtime() {
       uniqueChatIds.add(storeAfter.activeChatId);
     }
     for (const chatId of uniqueChatIds) {
-      await storeAfter.loadMessages(chatId);
+      await storeAfter.loadMessages(chatId, { markRead: false });
     }
   }