feat: Dashboard stats from OCM API, fix module warnings (v0.10.1)

- Rename postcss.config.js/tailwind.config.js to .cjs to fix ESM warning
- Replace Stats Summary placeholder with real OCM /api/stats data
- Handle loading, error, and offline states gracefully
- Bump version to 0.10.1

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

preload.js

@@ -4,7 +4,7 @@ const { contextBridge, ipcRenderer } = require('electron');
 
 contextBridge.exposeInMainWorld('odo', {
   platform: process.platform,
-  version: '0.10.0',
+  version: '0.10.1',
   isElectron: true,
 
   gateway: {