web server tweaks

src/activities/network/CrossPointWebServerActivity.cpp

@@ -77,7 +77,7 @@ void CrossPointWebServerActivity::onEnter() {
   updateRequired = true;
 
   xTaskCreate(&CrossPointWebServerActivity::taskTrampoline, "WebServerActivityTask",
-              2048,               // Stack size
+              6144,               // Stack size (increased: QR code + string ops need ~4KB)
               this,               // Parameters
               1,                  // Priority
               &displayTaskHandle  // Task handle

src/network/CrossPointWebServer.cpp

@@ -1143,6 +1143,11 @@ void CrossPointWebServer::handleRename() const {
   esp_task_wdt_reset();
   if (SdMan.rename(itemPath.c_str(), newPath.c_str())) {
     Serial.printf("[%lu] [WEB] Rename successful\n", millis());
+
+    // Clear epub cache for both old and new paths to prevent stale metadata
+    clearEpubCacheIfNeeded(itemPath);  // Old path cache is now invalid
+    clearEpubCacheIfNeeded(newPath);   // Ensure clean cache for new path
+
     server->send(200, "text/plain", "Renamed successfully");
   } else {
     Serial.printf("[%lu] [WEB] Rename failed\n", millis());