feat(runner): pass sceneInfoJson to Rust CLI for enhanced template rendering

frontend/scene-generator/generator-runner.js

@@ -2,7 +2,7 @@ const { spawn } = require("child_process");
 const path = require("path");
 
 function runGenerator(params, sseWriter, projectRoot) {
-  const { sourceDir, sceneId, sceneName, sceneKind, targetUrl, outputRoot, lessons } = params;
+  const { sourceDir, sceneId, sceneName, sceneKind, targetUrl, outputRoot, lessons, sceneInfoJson } = params;
 
   const normalize = (p) => p.replace(/\\/g, "/");
 
@@ -35,6 +35,11 @@ function runGenerator(params, sseWriter, projectRoot) {
     args.push("--lessons", normalize(lessons));
   }
 
+  // Pass scene info JSON if available
+  if (sceneInfoJson) {
+    args.push("--scene-info-json", sceneInfoJson);
+  }
+
   return new Promise((resolve, reject) => {
     sseWriter.write(
       `event: status\ndata: ${JSON.stringify({