feat(M7): electron-builder packaging (MSI + NSIS) + electron-updater

- electron-builder.yml: msi(fixed upgradeCode)+nsis x64, asarUnpack node-pty/ssh2, npmRebuild off, publish generic for latest.yml
- updater: packaged-only, OT_UPDATE_URL/OT_UPDATE_TOKEN env, ready+5s check, warn-only failures; auto-update channel is NSIS (MSI not supported by electron-updater)
- scripts dist/dist:dir; win-unpacked smoke verified (native modules load)

electron-builder.yml

@@ -0,0 +1,50 @@
+appId: site.codingplan.openterminal
+productName: OpenTerminal
+
+directories:
+  output: release
+
+files:
+  - out/**
+  - package.json
+
+asar: true
+asarUnpack:
+  - "**/node_modules/@lydell/node-pty/**"
+  - "**/node_modules/ssh2/**"
+
+# @lydell/node-pty ships prebuilt binaries; do not trigger a rebuild.
+npmRebuild: false
+
+# Electron-updater only supports NSIS auto-updates (MSI has no update channel).
+# The NSIS .exe + latest.yml get uploaded together; MSI is manual/enterprise only.
+win:
+  target:
+    - target: msi
+    - target: nsis
+
+msi:
+  oneClick: false
+  # Fixed upgrade code keeps the upgrade chain consistent across releases.
+  upgradeCode: "{5ab9f79e-e4eb-4052-9df6-3af3a301ab0a}"
+  artifactName: ${productName}-${version}-setup.${ext}
+  # No build/icon.ico exists. The WiX template only emits <Icon> when an icon is
+  # set, but the shortcut elements still reference Icon=<iconId>, so MSI linking
+  # fails with LGHT0094. Disabling MSI shortcuts drops the dangling reference.
+  # NSIS still creates its shortcuts independently.
+  createDesktopShortcut: false
+  createStartMenuShortcut: false
+
+nsis:
+  oneClick: false
+  allowToChangeInstallationDirectory: true
+  perMachine: false
+  artifactName: ${productName}-${version}-setup.${ext}
+
+# Declaring a publish provider makes electron-builder emit the update-info file
+# (latest.yml) into directories.output for upload. No token is stored here; the
+# main agent handles feed authentication during upload. Build runs with the
+# default publish policy, so nothing is uploaded from this script.
+publish:
+  provider: generic
+  url: https://git.codingplan.site/api/packages/admin/generic/openterminal-update/stable/

package.json

@@ -1,7 +1,7 @@
 {
   "name": "open-terminal",
   "productName": "OpenTerminal",
-  "version": "0.1.0",
+  "version": "0.7.0",
   "description": "Terminal with split panes, themes and fonts (XTerminal-inspired)",
   "main": "out/main/index.js",
   "author": "Bill",
@@ -10,7 +10,9 @@
     "dev": "electron-vite dev",
     "build": "electron-vite build",
     "preview": "electron-vite preview",
-    "typecheck": "tsc --noEmit -p tsconfig.node.json && tsc --noEmit -p tsconfig.web.json"
+    "typecheck": "tsc --noEmit -p tsconfig.node.json && tsc --noEmit -p tsconfig.web.json",
+    "dist": "electron-vite build && electron-builder --win msi nsis",
+    "dist:dir": "electron-vite build && electron-builder --win --dir"
   },
   "dependencies": {
     "@lydell/node-pty": "^1.2.0-beta.15",

src/main/index.ts

@@ -3,6 +3,7 @@ import { join } from 'path'
 import { registerIpc } from './ipc'
 import { killAllPtys } from './pty'
 import { applyStartupSystemSettings, loadSettings } from './settingsStore'
+import { configureAutoUpdater } from './updater'
 
 function createWindow(): void {
   const win = new BrowserWindow({
@@ -54,6 +55,7 @@ app.whenReady().then(() => {
   // settings dialog is never opened this run.
   applyStartupSystemSettings(loadSettings())
   createWindow()
+  configureAutoUpdater()
 
   app.on('activate', () => {
     if (BrowserWindow.getAllWindows().length === 0) createWindow()

src/main/updater.ts

@@ -0,0 +1,54 @@
+import { app } from 'electron'
+import { autoUpdater } from 'electron-updater'
+
+/**
+ * Default update feed (generic provider). The main agent uploads latest.yml and
+ * the NSIS installer to this stable path.
+ *
+ * KNOWN LIMITATION: electron-updater does NOT support MSI auto-updates. The
+ * update channel always runs through the NSIS .exe (latest.yml + .exe are
+ * uploaded together). MSI is manual/enterprise distribution only.
+ */
+const DEFAULT_FEED_URL =
+  'https://git.codingplan.site/api/packages/admin/generic/openterminal-update/stable/'
+
+export function configureAutoUpdater(): void {
+  // Update checks only run in packaged builds; no-op during development.
+  if (!app.isPackaged) {
+    return
+  }
+
+  const url = process.env.OT_UPDATE_URL || DEFAULT_FEED_URL
+  const token = process.env.OT_UPDATE_TOKEN
+
+  autoUpdater.setFeedURL({
+    provider: 'generic',
+    url,
+    ...(token ? { requestHeaders: { Authorization: `token ${token}` } } : {})
+  })
+
+  autoUpdater.logger = console
+  autoUpdater.autoDownload = true
+  autoUpdater.autoInstallOnAppQuit = true
+
+  // Check shortly after startup; log errors without crashing the app.
+  const timer = setTimeout(() => {
+    autoUpdater
+      .checkForUpdatesAndNotify()
+      .catch((err) => console.warn('[updater] checkForUpdates failed:', err))
+  }, 5000)
+  timer.unref?.()
+}
+
+/** Public entry point for later UI wiring (not connected this milestone). */
+export function checkForUpdates(): Promise<void> {
+  if (!app.isPackaged) {
+    return Promise.resolve()
+  }
+  return autoUpdater
+    .checkForUpdates()
+    .then(() => {})
+    .catch((err) => {
+      console.warn('[updater] checkForUpdates failed:', err)
+    })
+}