feat(desktop): ts-ify everything

apps/desktop/scripts/bundle-electron-main.mjs

@@ -0,0 +1,60 @@
+#!/usr/bin/env node
+// bundle-electron-main.mjs — bundles electron/main.ts and electron/preload.ts
+// into self-contained js files in dist/ so the packaged app doesn't need
+// node_modules/ or tsx at runtime.
+//
+// Output:
+//   dist/electron-main.mjs    (MJS bundle — entry point for packaged app)
+//   dist/electron-preload.js (CJS bundle — loaded via BrowserWindow preload)
+//
+// `electron` and `node-pty` are external (provided by the runtime / staged
+// separately via stage-native-deps).
+import { build } from 'esbuild'
+import { resolve, dirname } from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { mkdirSync } from 'node:fs'
+
+const here = dirname(fileURLToPath(import.meta.url))
+const root = resolve(here, '..')
+const distDir = resolve(root, 'dist')
+mkdirSync(distDir, { recursive: true })
+
+const mainEntry = resolve(root, 'electron/main.ts')
+const mainOut = resolve(distDir, 'electron-main.mjs')
+const preloadEntry = resolve(root, 'electron/preload.ts')
+const preloadOut = resolve(distDir, 'electron-preload.js')
+
+const external = ['electron', 'node-pty', 'fs']
+  const define = {
+    'process.env.HERMES_DESKTOP_IS_PACKAGED': JSON.stringify(true)
+  }
+// Bundle main.ts → dist/electron-main.mjs
+await build({
+  entryPoints: [mainEntry],
+  bundle: true,
+  platform: 'node',
+  format: 'esm',
+  target: 'node20',
+  outfile: mainOut,
+  external,
+  banner:  {
+    js: "import { createRequire } from 'module'; const require = createRequire(import.meta.url);",
+  },
+  define,
+  logLevel: 'info',
+})
+console.log(`bundled ${mainOut}`)
+
+// Bundle preload.ts → dist/electron-preload.cjs
+await build({
+  entryPoints: [preloadEntry],
+  bundle: true,
+  platform: 'node',
+  format: 'cjs',
+  target: 'node20',
+  outfile: preloadOut,
+  external,
+  define,
+  logLevel: 'info',
+})
+console.log(`bundled ${preloadOut}`)