Add Chromium-only Blender WebEngine parity work

tools/web/check-collapse-ratios.mjs

@@ -0,0 +1,19 @@
+import { execFileSync } from "node:child_process";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+
+const root = path.resolve(path.dirname(fileURLToPath(import.meta.url)), "../..");
+const probe = path.join(root, "tools/web/probe-collapse-ratio.mjs");
+const ratios = [1, 0.9, 0.8, 0.75, 0.7, 0.65, 0.5, 0.25];
+const results = [];
+
+for (const ratio of ratios) {
+  const output = execFileSync(process.execPath, [probe, String(ratio)], { cwd: root, encoding: "utf8" }).trim();
+  const result = JSON.parse(output.split("\n").at(-1) ?? "{}");
+  if (result.result !== 0 || !result.output || result.output.triangleCount <= 0) {
+    throw new Error(`Collapse ratio ${ratio} failed: ${output}`);
+  }
+  results.push({ ratio, triangles: result.output.triangleCount, vertices: result.output.vertexCount });
+}
+
+console.log(`collapse-ratios-ok ${JSON.stringify(results)}`);