Organize distribution screenshots for better accessibility and loading

Move all desktop environment screenshots to the public directory and remove static server configuration for them.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: c4fc7b07-53a2-4929-bc12-f392104bb085
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: 9b951424-8abb-49f6-aee8-ff13b2c83582
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/55e426a8-5a2b-421b-8bd4-30481ae0063b/c4fc7b07-53a2-4929-bc12-f392104bb085/a2ci8g4
Replit-Helium-Checkpoint-Created: true

server/index.ts

@@ -2,12 +2,8 @@ import express, { type Request, Response, NextFunction } from "express";
 import { registerRoutes } from "./routes";
 import { serveStatic } from "./static";
 import { createServer } from "http";
-import path from "path";
 
 const app = express();
-
-// Serve DE screenshots statically
-app.use('/de_screenshots', express.static(path.join(process.cwd(), 'attached_assets/de_screenshots')));
 const httpServer = createServer(app);
 
 declare module "http" {