feat: initial commit — odo v0.9.4 Electron desktop app for OpenClaw management

- Electron main process with tray icon and IPC setup
- openclaw-manager.js server bridge
- Architecture design document (ODO_ARCHITECTURE.md)
- preload.js for renderer context bridge

preload.js

@@ -0,0 +1,12 @@
+'use strict';
+
+// Preload script — runs in renderer before page loads
+// Currently minimal; will be expanded for IPC bridge in future phases
+
+const { contextBridge } = require('electron');
+
+contextBridge.exposeInMainWorld('odo', {
+  platform: process.platform,
+  version: '0.9.4',
+  isElectron: true
+});