Fix print page vendor load + persist authored scene across deploys

public/anchors-print.html

@@ -66,7 +66,12 @@
 
   <div id="sheet"><div id="empty">Loading anchors…</div></div>
 
-  <!-- vendored ArUco dictionary for the exact bit patterns -->
+  <!-- js-aruco chain (order matters): cv -> svd -> posit -> aruco -> dictionary.
+       The dictionary file references AR from aruco.js; loading it alone throws. -->
+  <script src="vendor/cv.js"></script>
+  <script src="vendor/svd.js"></script>
+  <script src="vendor/posit1.js"></script>
+  <script src="vendor/aruco.js"></script>
   <script src="vendor/dictionaries/aruco_4x4_1000.js"></script>
   <script>
   (function () {
@@ -80,11 +85,9 @@
     // Build a 6x6 bit grid (0=black,1=white) for an ArUco 4x4 id.
     // Outer ring is the quiet border (all black); inner 4x4 = the code bits.
     function grid6(id) {
-      const dict = (window.AR && AR.DICTIONARIES && AR.DICTIONARIES.ARUCO_4X4_1000)
-        ? AR.DICTIONARIES.ARUCO_4X4_1000 : null;
-      // js-aruco exposes the dictionary via AR.Dictionary; build one to read codeList
+      // Full js-aruco chain is loaded, so AR.Dictionary is available.
       const d = new AR.Dictionary('ARUCO_4X4_1000');
-      const code = d.codeList[id];
+      const code = d.codeList[id];        // 16-char bit string, e.g. "1011..."
       if (!code) return null;
       const g = [];
       for (let y = -1; y <= 4; y++) {