Complete M16 action select lasso parity

tools/web/check-generated-gap.mjs

@@ -2193,6 +2193,46 @@ if (task === "M16-GAP-00137") {
   process.stdout.write(`generated-gap-ok task=${task} action=${animation.id} selectedFrame=3 channels=${animation.channels.length} desktop=exact saveReopen=exact next=${report.nextTask}\n`);
   process.exit(0);
 }
+if (task === "M16-GAP-00138") {
+  const fixture = path.join(root, "tests/files/web/generated/M16-GAP-00138-operator-action.select_lasso.blend");
+  const desktopPath = path.join(root, "tests/golden/M16-GAP-00138/action-select-lasso-desktop-report.json");
+  fs.mkdirSync(path.dirname(desktopPath), { recursive: true });
+  const run = spawnSync(process.env.BLENDER_BIN ?? path.join(root, "build_blender_5.2.0/bin/blender"), ["-b", "--factory-startup", "--python", path.join(root, "tools/web/check-action-select-lasso-desktop.py"), "--", fixture, desktopPath], { cwd: root, encoding: "utf8", maxBuffer: 8 * 1024 * 1024 });
+  assert.equal(run.status, 0, `${run.stdout ?? ""}\n${run.stderr ?? ""}`);
+  const desktop = JSON.parse(fs.readFileSync(desktopPath, "utf8"));
+  assert.equal(desktop.saveReopen, "EXACT");
+  const engine = await factory({ wasmBinary });
+  const handle = engine._web_engine_create();
+  open(engine, handle, fs.readFileSync(fixture));
+  const before = snapshot(engine, handle);
+  const animation = before.animations?.find((value) => value.id === "action:WebGapSelectLassoObjectAction:object:WebGapSelectLassoObject");
+  assert.ok(animation);
+  assert.equal(animation.channels.length, desktop.action.channels.length);
+  for (const [index, channel] of animation.channels.entries()) {
+    const expected = desktop.action.channels[index];
+    assert.equal(channel.path.replace(/\[\d+\]$/, ""), expected.path);
+    assert.deepEqual(channel.keyframes.map((value) => value.frame), expected.frames);
+    assert.deepEqual(channel.keyframes.map((value) => value.selected), expected.selected);
+  }
+  assert.deepEqual(animation.channels.map((channel) => channel.keyframes.filter((value) => value.selected).map((value) => value.frame)), [[3], [3], [3]]);
+  const saved = output(engine, handle, engine._web_engine_save_blend, true);
+  const reopened = engine._web_engine_create();
+  open(engine, reopened, saved);
+  assert.deepEqual(snapshot(engine, reopened).animations, before.animations);
+  const malformed = new Uint8Array([0x42, 0x4c, 0x45, 0x4e, 0x44, 0x45, 0x52]);
+  const pointer = engine._malloc(malformed.byteLength);
+  let result;
+  try { engine.HEAPU8.set(malformed, pointer); result = engine._web_engine_open_blend(handle, pointer, malformed.byteLength); } finally { engine._free(pointer); }
+  assert.notEqual(result, 0);
+  assert.deepEqual(snapshot(engine, handle).animations, before.animations);
+  engine._web_engine_destroy(handle);
+  engine._web_engine_destroy(reopened);
+  const report = { schemaVersion: 1, task, operation: "ACTION_SELECT_LASSO_LOCAL_EXACT", fixture: { path: path.relative(root, fixture).replaceAll(path.sep, "/"), sha256: desktop.fixtureSha256 }, desktop: { status: "EXACT", report: path.relative(root, desktopPath).replaceAll(path.sep, "/"), saveReopen: desktop.saveReopen }, wasm: { status: "EXACT", actionId: animation.id, selectedFrame: 3, selectedPerChannel: animation.channels.map((channel) => channel.keyframes.filter((value) => value.selected).map((value) => value.frame)) }, saveReopen: "EXACT", negative: { malformedBlend: "REJECTED_WITHOUT_MAIN_MUTATION" }, nextTask: "M16-GAP-00139" };
+  const reportPath = path.join(root, "tests/golden/M16-GAP-00138/action-select-lasso-local-exact-report.json");
+  fs.writeFileSync(reportPath, `${JSON.stringify(report, null, 2)}\n`);
+  process.stdout.write(`generated-gap-ok task=${task} action=${animation.id} selectedFrame=3 channels=${animation.channels.length} desktop=exact saveReopen=exact next=${report.nextTask}\n`);
+  process.exit(0);
+}
 if (task === "M16-GAP-00027") {
   const fixture = path.join(root, "tests/files/web/generated/M16-GAP-00027-datablock-WindowManager.blend");
   const desktopPath = path.join(root, "tests/golden/M16-GAP-00027/window-manager-desktop-report.json");