Use electron-vite's ?modulePath instead of tsx for workers

electron-vite has a `?modulePath` vite plugin that compiles the
import and returns an absolute path, so we don't need to use tsx
to compile and execute the typescript directly.

Vanilla vite has a `?worker` plugin but that's only for webworkers;
support for node workers is stalled
(vitejs/vite#3932).

Author: legoktm

app/package.json

@@ -63,7 +63,6 @@
     "jsdom": "^26.1.0",
     "prettier": "3.6.0",
     "testcontainers": "^11.2.1",
-    "tsx": "^4.20.5",
     "typescript": "~5.8.3",
     "typescript-eslint": "^8.35.0",
     "vite": "^7.0.0",

app/pnpm-lock.yaml

@@ -20,6 +20,7 @@ import type {
   SyncMetadataRequest,
 } from "../types";
 import { syncMetadata } from "./sync";
+import workerPath from "./fetch/worker?modulePath";
 
 const db = new DB();
 
@@ -59,16 +60,7 @@ function createWindow(): void {
 }
 
 function spawnFetchWorker(): Worker {
-  const scriptPath = join(
-    app.getAppPath(),
-    "src",
-    "main",
-    "fetch",
-    "worker.ts",
-  );
-  const worker = new Worker(scriptPath, {
-    execArgv: ["--require", "tsx"],
-  });
+  const worker = new Worker(workerPath);
 
   worker.on("message", (result) => {
     console.log("Result from worker: ", result);