feat: establish unified project foundation with root config cleanup

- Archive legacy packages/, services/, server/ directories
- Update pnpm workspace to web + browser-ext
- Simplify root package.json scripts to delegate to web/
- Update turbo.json for new workspace structure
- Remove obsolete root config files (vite, tsconfig, etc.)
- Add .nvmrc, .editorconfig for consistent dev environment
- Update CI workflow to remove references to deleted packages
- Add missing dependencies (@tailwindcss/vite, tailwindcss) to web
- Add test and lint scripts to web package
- Verify pnpm install, build, and dev work correctly

test-ws-maxpayload.js

@@ -1,44 +0,0 @@
-const { WebSocketServer } = require('ws');
-const { createServer } = require('http');
-
-// Test WebSocket maxPayload parameter
-const httpServer = createServer();
-const wss = new WebSocketServer({
-  port: 0,
-  maxPayload: 65536, // 64KB
-});
-
-let testPassed = false;
-
-wss.on('connection', (ws) => {
-  console.log('Client connected');
-  
-  // Send message larger than 64KB
-  const oversized = 'x'.repeat(70000);
-  
-  console.log('Sending 70KB message...');
-  ws.send(oversized, (err) => {
-    if (err) {
-      console.log('✓ Error received (expected):', err.message);
-      testPassed = true;
-    } else {
-      console.log('✗ No error - maxPayload NOT enforced!');
-    }
-    
-    ws.close();
-    httpServer.close();
-    wss.close();
-    
-    if (testPassed) {
-      console.log('✅ TEST PASSED: maxPayload (64KB) is enforced');
-      process.exit(0);
-    } else {
-      console.log('❌ TEST FAILED');
-      process.exit(1);
-    }
-  });
-});
-
-httpServer.listen(0, () => {
-  console.log('Server listening on port', httpServer.address().port);
-});