feat: unified 0 and 90 degree PDF envelope and category descriptors

app/src/lib/webgl-detect.ts

@@ -0,0 +1,18 @@
+let _webglSupported: boolean | null = null;
+
+export function isWebGLSupported(): boolean {
+  if (_webglSupported !== null) return _webglSupported;
+
+  try {
+    const canvas = document.createElement('canvas');
+    const gl =
+      canvas.getContext('webgl2') ??
+      canvas.getContext('webgl') ??
+      canvas.getContext('experimental-webgl');
+    _webglSupported = gl !== null;
+  } catch {
+    _webglSupported = false;
+  }
+
+  return _webglSupported;
+}