Add category suggestions to product editor, deal with taxonomy embeddings better, fix category badge overflow

inventory-server/src/server.js

@@ -162,6 +162,8 @@ async function startServer() {
     const PORT = process.env.PORT || 3000;
     app.listen(PORT, () => {
       console.log(`[Server] Running in ${process.env.NODE_ENV || 'development'} mode on port ${PORT}`);
+      // Pre-warm AI service so taxonomy embeddings are ready before first user request
+      aiRouter.initInBackground();
     });
   } catch (error) {
     console.error('Failed to start server:', error);