feat(rc3): Crumbblocks UI Mission & Smart Routing 🎨✨

crumbblocks/mock_ws_server.js

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+// Minimal WebSocket echo server for testing Painter stream
+// Usage: npm i ws; node mock_ws_server.js
+const WebSocket = require('ws');
+const wss = new WebSocket.Server({ port: 9980 });
+console.log('WS server on ws://localhost:9980');
+wss.on('connection', (ws)=>{
+  console.log('client connected');
+  ws.on('message', (msg)=>{
+    try{
+      const obj = JSON.parse(msg);
+      // log only essentials to keep console tidy
+      if(obj.type==='point'){
+        process.stdout.write(`• point ${obj.p.x.toFixed(1)},${obj.p.y.toFixed(1)}\r`);
+      }else{
+        console.log(obj.type);
+      }
+    }catch(e){}
+    // optionally echo back
+    // ws.send(msg);
+  });
+  ws.on('close', ()=>console.log('client closed'));
+});