feat: Arch Linux packaging with Electron frontend, systemd backend service, and Windows exe build

- Add Electron wrapper (main.cjs, preload.cjs) for desktop frontend
- Add systemd service unit, env config, and sysusers for backend API
- Add PKGBUILD and .install for Arch package (makepkg -si)
- Add desktop entry, SVG/PNG icon, and wrapper scripts
- Add bin/build-pkg, bin/install-pkg, bin/windows-pkg scripts
- Make API port configurable via PORT env var (default 3000, prod 18390)
- Add electron-builder config for Windows exe cross-compilation
- Set vite base to './' for Electron file:// loading

2 files changed, 40 insertions, 0 deletions

diff --git a/packages/frontend/electron/main.cjs b/packages/frontend/electron/main.cjs
new file mode 100644
index 0000000..2d947da
--- /dev/null
+++ b/packages/frontend/electron/main.cjs
@@ -0,0 +1,33 @@
+const { app, BrowserWindow } = require('electron');
+const path = require('path');
+
+function createWindow() {
+	const win = new BrowserWindow({
+		width: 1280,
+		height: 800,
+		title: 'Dispatch',
+		webPreferences: {
+			nodeIntegration: false,
+			contextIsolation: true,
+			preload: path.join(__dirname, 'preload.cjs'),
+		},
+	});
+
+	win.loadFile(path.join(__dirname, '../dist/index.html'));
+}
+
+app.whenReady().then(() => {
+	createWindow();
+
+	app.on('activate', () => {
+		if (BrowserWindow.getAllWindows().length === 0) {
+			createWindow();
+		}
+	});
+});
+
+app.on('window-all-closed', () => {
+	if (process.platform !== 'darwin') {
+		app.quit();
+	}
+});
diff --git a/packages/frontend/electron/preload.cjs b/packages/frontend/electron/preload.cjs
new file mode 100644
index 0000000..c254892
--- /dev/null
+++ b/packages/frontend/electron/preload.cjs
@@ -0,0 +1,7 @@
+const { contextBridge } = require('electron');
+
+contextBridge.exposeInMainWorld('versions', {
+	electron: process.versions.electron,
+	node: process.versions.node,
+	chrome: process.versions.chrome,
+});