Update site appearance and user authentication functionality

Implement a new login system, update UI elements, and enable static asset serving for images.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 069d4324-6c40-4355-955e-c714a50de1ea
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/3df548ff-50ae-432f-9be4-25d34eccc983/069d4324-6c40-4355-955e-c714a50de1ea/InMLMqG

server/index.ts

@@ -39,6 +39,9 @@ app.use((req, res, next) => {
 (async () => {
   const server = await registerRoutes(app);
 
+  // Serve attached assets statically
+  app.use('/attached_assets', express.static('attached_assets'));
+
   app.use((err: any, _req: Request, res: Response, _next: NextFunction) => {
     const status = err.status || err.statusCode || 500;
     const message = err.message || "Internal Server Error";