feat: 31 languages + disk safety panel + electron auto-updater + VM uninstall

i18n:
- Expanded from 6 to 31 languages (no Hebrew per policy)
- Added: pt, ru, ja, ko, hi, tr, it, nl, pl, sv, id, uk, th, vi, fa, cs, ms, ro, el, bn, hu, fi, da, no, ur
- RTL support for ar, fa, ur
- Language selector dropdown wired into dashboard navbar

Disk Safety:
- New backend route /api/v1/disk-settings (GET/POST/cleanup)
- Frontend modal with sliders for health interval, max entries, retention days
- Clean Up Now button triggers immediate cleanup
- Wired into dashboard navbar

Desktop Auto-Updater (from timed-out subagent):
- electron-updater installed and configured
- Checks get.dashcaddy.net/release/ for updates
- Publish config added to package.json

VM Uninstall:
- Wizard calls vmDestroy before regular uninstall
- Cleans up VM/disk sandbox on uninstall

Cleanup:
- Recursive data nesting guard (nesting-guard.js)
- Removed 242MB of data/data/data/ duplicates

dashcaddy-api/src/app.js

@@ -94,6 +94,7 @@ const eventsRoutes = require('../routes/events');
 const workflowsRoutes = require('../routes/workflows');
 const dependenciesRoutes = require('../routes/dependencies');
 const securityRoutes = require('../routes/security');
+const diskSettingsRoutes = require('../routes/disk-settings');
 const logInsightsRoutes = require('../routes/log-insights');
 const billingRoutes = require('../routes/billing');
 const DependencyManager = require('./managers/dependency-manager');
@@ -757,6 +758,7 @@ async function createApp() {
   }));
 
   // Log Insights — plain English activity summary + safe log disposal
+  apiRouter.use('/disk-settings', diskSettingsRoutes);
   apiRouter.use(logInsightsRoutes({
     asyncHandler: ctx.asyncHandler,
     ok: ctx.ok,