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

tests/e2e/e2e-global-setup.ts

@@ -1,4 +1,5 @@
 import { execFileSync } from "node:child_process";
+import { createElectronLaunchEnv } from "./launch";
 
 /**
  * Playwright globalSetup: build the Electron app from source before E2E tests.
@@ -9,6 +10,7 @@ export default function globalSetup() {
     stdio: "inherit",
     cwd: process.cwd(),
     timeout: 120_000,
+    env: createElectronLaunchEnv({}),
     shell: process.platform === "win32",
   });
 }