harden sse errors

src/hooks/use-server-events.ts

@@ -159,16 +159,29 @@ export function useServerEvents() {
         logger.error("SSE connection error", error);
         disconnect();
 
+        // The stream is auth-guarded, so an error is often the server rejecting
+        // an expired session rather than a network blip. Try to refresh; if the
+        // session is genuinely gone, stop retrying so we don't hammer the
+        // endpoint forever — a real re-login (or a wake event) will reconnect.
+        let sessionValid = true;
+        try {
+          const { attemptRefreshingSession } = await import('supertokens-web-js/recipe/session');
+          sessionValid = await attemptRefreshingSession();
+        } catch {
+          // Refresh call itself failed (likely offline) — treat as transient.
+        }
+
+        if (disposed) return;
+
+        if (!sessionValid) {
+          logger.warn("SSE stopped: session is no longer valid");
+          return;
+        }
+
         retryCount += 1;
         const delay = Math.min(1000 * Math.pow(1.5, retryCount - 1), 15000);
         logger.info(`SSE reconnection attempt ${retryCount} in ${Math.round(delay)}ms`);
 
-        try {
-          const { attemptRefreshingSession } = await import('supertokens-web-js/recipe/session');
-          await attemptRefreshingSession();
-        } catch {
-        }
-
         reconnect(delay);
       };
     };