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Root cause of "the fix works on mobile but not on desktop/web": nothing was wrong with the code — the desktop app now CLOSES TO TRAY, so it can run for weeks on the page it loaded on day one and never re-fetch after a deploy. There was also no way to force it off a stale page (no menu bar → no reload accelerator). - Server: GET /api/build returns home.html's __BUILD marker. - Client: polls it (boot, on focus/visibility, every 10 min); when the server's build differs from the running one, shows a branded "A new version is available — Refresh" banner. Settings gains an always-available "Refresh app" with the current build shown. - hardReloadApp(): in the browser it unregisters service workers + clears CacheStorage then reloads cache-busted; in the shell it calls the native hard reload. - Desktop: hard-reload IPC (clears the session HTTP cache + reloadIgnoringCache), wired to Ctrl+R (reload), Ctrl+Shift+R / F5 (hard reload), and a "Refresh app (get latest)" tray item. Previously there was literally no way to clear the cache from the app. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>