Build the current workspace snapshot on native CI runners

This branch snapshots the in-progress desktop workspace so GitHub-hosted Windows and Linux runners can package the same source tree that already passes local verification on macOS.

Constraint: Local Apple Silicon Docker/Wine packaging crashes before Windows artifacts are produced
Rejected: Publish from the incomplete base repo state | remote typecheck failed because current source additions were missing
Confidence: medium
Scope-risk: broad
Directive: Treat this branch as a build snapshot only; do not merge it without reviewing the unrelated workspace changes it contains
Tested: local typecheck, lint, workspace typecheck, unit tests, integration tests, e2e smoke, macOS signed release upload
Not-tested: Native Windows/Linux artifacts before this CI run

scripts/run-vitest.mjs

@@ -0,0 +1,32 @@
+import { spawn } from "node:child_process";
+import { resolve } from "node:path";
+
+const vitestEntrypoint = resolve(process.cwd(), "node_modules/vitest/vitest.mjs");
+const args = process.argv.slice(2);
+const warningFlag = "--disable-warning=ExperimentalWarning";
+const env = { ...process.env };
+const existingNodeOptions = env.NODE_OPTIONS?.trim();
+
+if (!existingNodeOptions) {
+  env.NODE_OPTIONS = warningFlag;
+} else if (!existingNodeOptions.includes(warningFlag)) {
+  env.NODE_OPTIONS = `${existingNodeOptions} ${warningFlag}`;
+}
+
+const child = spawn(process.execPath, ["--disable-warning=ExperimentalWarning", vitestEntrypoint, ...args], {
+  stdio: "inherit",
+  env,
+});
+
+child.on("exit", (code, signal) => {
+  if (signal) {
+    process.kill(process.pid, signal);
+    return;
+  }
+  process.exit(code ?? 1);
+});
+
+child.on("error", (error) => {
+  console.error(error);
+  process.exit(1);
+});