feat(settings): auto-set default provider after successful OAuth (#254)

electron/gateway/manager.ts

@@ -1347,6 +1347,8 @@ export class GatewayManager extends EventEmitter {
         const reasonStr = reason?.toString() || 'unknown';
         logger.warn(`Gateway WebSocket closed (code=${code}, reason=${reasonStr}, handshake=${handshakeComplete ? 'ok' : 'pending'})`);
         if (!handshakeComplete) {
+          // If the socket closes before the handshake completes, it usually means the server is still starting or restarting.
+          // Rejecting this promise will cause the caller (startProcess/reconnect logic) to retry cleanly.
           rejectOnce(new Error(`WebSocket closed before handshake: ${reasonStr}`));
           return;
         }
@@ -1358,7 +1360,12 @@ export class GatewayManager extends EventEmitter {
       });
 
       this.ws.on('error', (error) => {
+        // Suppress noisy ECONNREFUSED/WebSocket handshake errors that happen during expected Gateway restarts.
+        if (error.message?.includes('closed before handshake') || (error as NodeJS.ErrnoException).code === 'ECONNREFUSED') {
+          logger.debug(`Gateway WebSocket connection error (transient): ${error.message}`);
+        } else {
           logger.error('Gateway WebSocket error:', error);
+        }
         if (!handshakeComplete) {
           rejectOnce(error);
         }

src/components/settings/ProvidersSettings.tsx

@@ -516,7 +516,14 @@ function AddProviderDialog({ existingTypes, onClose, onAdd, onValidateKey }: Add
       // If we call add() here with undefined baseUrl, it will overwrite and erase it!
       // So we just fetch the latest list from the backend to update the UI.
       try {
-        await useProviderStore.getState().fetchProviders();
+        const store = useProviderStore.getState();
+        await store.fetchProviders();
+
+        // Auto-set as default if no default is currently configured
+        if (!store.defaultProviderId && latestRef.current.selectedType) {
+          // Provider type is expected to match provider ID for built-in OAuth providers
+          await store.setDefaultProvider(latestRef.current.selectedType);
+        }
       } catch (err) {
         console.error('Failed to refresh providers after OAuth:', err);
       }