fix: make Windows updater helper launch reliable

src/main/update-service.cjs

@@ -33,6 +33,18 @@ function resolveWindowsPowerShellPath(environment = process.env) {
   return "powershell.exe";
 }
 
+function windowsUpdaterSpawnOptions(cwd) {
+  return {
+    // A detached hidden PowerShell child can exit successfully on Windows
+    // without ever executing its -File script. Normal Windows children survive
+    // their parent; unref() below releases the event-loop reference instead.
+    detached: false,
+    stdio: "ignore",
+    windowsHide: true,
+    cwd,
+  };
+}
+
 async function readJsonFile(filePath) {
   try {
     return JSON.parse(await fs.readFile(filePath, "utf8"));
@@ -450,12 +462,11 @@ class UpdateService {
     const childState = { exited: false, code: null, error: null };
     let child;
     try {
-      child = this.spawnProcess(executable, args, {
-        detached: true,
-        stdio: "ignore",
-        windowsHide: true,
-        cwd: this.sourcePath,
-      });
+      child = this.spawnProcess(
+        executable,
+        args,
+        windowsUpdaterSpawnOptions(this.sourcePath),
+      );
     } catch (error) {
       error.code ||= "UPDATE_HELPER_SPAWN_FAILED";
       throw error;
@@ -591,12 +602,11 @@ class UpdateService {
       "-UpdateId",
       updateId,
     ];
-    const child = this.spawnProcess(executable, args, {
-      detached: true,
-      stdio: "ignore",
-      windowsHide: true,
-      cwd: this.updateDirectory,
-    });
+    const child = this.spawnProcess(
+      executable,
+      args,
+      windowsUpdaterSpawnOptions(this.updateDirectory),
+    );
     const childState = { exited: false, code: null, error: null };
     child.once?.("error", (error) => {
       childState.error = error;
@@ -700,6 +710,7 @@ module.exports = {
   UpdateService,
   safeRepositoryPart,
   resolveWindowsPowerShellPath,
+  windowsUpdaterSpawnOptions,
   waitForUpdaterStarted,
   readJsonFile,
   readLogTail,

src/renderer/mock-repository-bridge.js

@@ -5,7 +5,7 @@ function createMockRepositoryBridge(context) {
       await wait(80);
       snapshot();
       return {
-        appVersion: "0.10.5-demo",
+        appVersion: "0.10.6-demo",
         platform: "win32",
         state: clone(state),
         git: { available: true, version: "git version 2.47.3" },