web interface

.vscode/launch.json

@@ -1,10 +1,19 @@
 {
   // Built-in JS debugger (no extensions needed).
+  // - "Composer (live)"  : F5 default — starts the dev server + opens the layered composer.
   // - "Open built plate" : zero-setup, rebuilds + opens the single file. Great for quick visual checks.
   // - "Debug source"     : breakpoints in src/*.js via a dev server (the real source-level debug).
   // - Node configs        : breakpoint straight into the generation logic — no browser involved.
   "version": "0.2.0",
   "configurations": [
+    {
+      "type": "chrome",
+      "request": "launch",
+      "name": "Composer (live)",
+      "url": "http://localhost:8000/composer.html",
+      "webRoot": "${workspaceFolder}",
+      "preLaunchTask": "serve"
+    },
     {
       "type": "chrome",
       "request": "launch",