docs/build: update README + compiled dist for list-modes/set-mode features

README:
  - set_display_layout: note idempotent behavior (no flicker if already in state)
  - add list_display_modes and set_display_mode rows to bridge table
  - add list-modes and set-mode to Option B test commands

dist/: compiled output from tsc (system_handlers, preload, index)

dist/main/index.js

@@ -50,8 +50,8 @@ async function createWindow() {
         cachedFullConfig = await (0, api_client_1.fetchFullConfig)(cachedSeed);
     }
     mainWindow = new electron_1.BrowserWindow({
-        width: 1600,
-        height: 900,
+        width: 1280,
+        height: 800,
         title: 'OSIT Aether Launcher (Native)',
         webPreferences: {
             preload: path.join(__dirname, '../preload/index.js'),
@@ -59,6 +59,9 @@ async function createWindow() {
             nodeIntegration: false,
         },
     });
+    // Let the native window manager maximize — more reliable than using screen.workArea,
+    // which Electron under-reports on KDE and other Linux DEs.
+    mainWindow.maximize();
     let targetUrl = 'http://demo.localhost:5173';
     if (cachedFullConfig && cachedFullConfig.native_device) {
         const device = cachedFullConfig.native_device;
@@ -82,15 +85,29 @@ async function createWindow() {
 (0, shell_handlers_1.registerShellHandlers)();
 (0, file_handlers_1.registerFileHandlers)();
 (0, system_handlers_1.registerSystemHandlers)();
-electron_1.app.on('ready', createWindow);
-electron_1.app.on('window-all-closed', () => {
-    if (process.platform !== 'darwin')
-        electron_1.app.quit();
-});
-electron_1.app.on('activate', () => {
-    if (mainWindow === null)
-        createWindow();
-});
+// Single instance lock — if another instance is already running, focus it and quit.
+const gotTheLock = electron_1.app.requestSingleInstanceLock();
+if (!gotTheLock) {
+    electron_1.app.quit();
+}
+else {
+    electron_1.app.on('second-instance', () => {
+        if (mainWindow) {
+            if (mainWindow.isMinimized())
+                mainWindow.restore();
+            mainWindow.focus();
+        }
+    });
+    electron_1.app.on('ready', createWindow);
+    electron_1.app.on('window-all-closed', () => {
+        if (process.platform !== 'darwin')
+            electron_1.app.quit();
+    });
+    electron_1.app.on('activate', () => {
+        if (mainWindow === null)
+            createWindow();
+    });
+}
 electron_1.ipcMain.handle('get-seed-config', async () => cachedSeed || await (0, config_loader_1.loadSeedConfig)());
 electron_1.ipcMain.handle('get-device-config', async () => cachedFullConfig);
 electron_1.ipcMain.handle('get-jwt', async () => null);