Add sync error logging, extend error flash, fix unload saves

- Log workforce sync errors to backend stdout so they appear in docker logs
- Extend error flash from 5s to 15s so errors are readable
- Replace sendBeacon (POST-only) with keepalive fetch (PUT) on unload —
  sendBeacon was hitting 404s on all three unload saves

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/a.js

@@ -0,0 +1,20 @@
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export default async function(f) {
+  self.postMessage(f());
+}
+
+export function someValue() {
+  return self.String("a");
+}

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/b.js

@@ -0,0 +1,20 @@
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Import for side-effects (of which there are none)
+// to make sure that a.js gets its own chunk.
+import {someValue} from "./a.js";
+
+export default function() {
+  return someValue();
+}

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/build/b-8d8ba280.js

@@ -0,0 +1,20 @@
+import { s as someValue } from './worker-50885fe8.js';
+
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+function b() {
+  return someValue();
+}
+
+export { b as default };

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/build/b-ZxqdL95j.js

@@ -0,0 +1,21 @@
+import { s as someValue } from './worker-DWbjHYfx.js';
+
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+function b() {
+  return someValue();
+}
+
+export { b as default };

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/build/b-f6cfc895.js

@@ -0,0 +1,21 @@
+import { s as someValue } from './worker-9fb0618d.js';
+
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+function b() {
+  return someValue();
+}
+
+export { b as default };

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/build/entry.js

@@ -0,0 +1,17 @@
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const w = new Worker(new URL("worker-DWbjHYfx.js", import.meta.url), { type: "module" });
+w.addEventListener("message", ev => {
+  window.parent.postMessage(ev.data, "*");
+});

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/build/runner.html

@@ -0,0 +1,15 @@
+<!--
+Copyright 2018 Google Inc. All Rights Reserved.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+-->
+
+<!doctype html>
+<script src="entry.js" type="module"></script>

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/build/worker-41a1c649.js

@@ -0,0 +1 @@
+import './worker-50885fe8.js';

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/build/worker-50885fe8.js

@@ -0,0 +1,38 @@
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+async function a(f) {
+  self.postMessage(f());
+}
+
+function someValue() {
+  return self.String("a");
+}
+
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import('./b-8d8ba280.js').then(({default: f}) => {
+  a(f);
+});
+
+export { someValue as s };

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/build/worker-9fb0618d.js

@@ -0,0 +1,39 @@
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+async function a(f) {
+  self.postMessage(f());
+}
+
+function someValue() {
+  return self.String("a");
+}
+
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import('./b-f6cfc895.js').then(({default: f}) => {
+  a(f);
+});
+
+export { someValue as s };

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/build/worker-DWbjHYfx.js

@@ -0,0 +1,39 @@
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+async function a(f) {
+  self.postMessage(f());
+}
+
+function someValue() {
+  return self.String("a");
+}
+
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import('./b-ZxqdL95j.js').then(({default: f}) => {
+  a(f);
+});
+
+export { someValue as s };

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/entry.js

@@ -0,0 +1,17 @@
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const w = new Worker("./worker.js", { type: "module" });
+w.addEventListener("message", ev => {
+  window.parent.postMessage(ev.data, "*");
+});

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/rollup.config.js

@@ -0,0 +1,4 @@
+module.exports = (config, outputOptions, omt) => {
+  outputOptions.format = "esm";
+  config.plugins = [omt()];
+};

frontend/node_modules/@trickfilm400/rollup-plugin-off-main-thread/tests/fixtures/module-worker/worker.js

@@ -0,0 +1,17 @@
+/**
+ * Copyright 2018 Google Inc. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import a from "./a.js";
+import("./b.js").then(({default: f}) => {
+  a(f);
+})